Information telescope visual terrestrie (1 Viewer)

[Ladegast]

Hola a todos, amigos de Birdforum,
antes que nada por favor perdonad mi inglés, se traduce automáticamente, así que tened paciencia.
Soy nuevo en este foro, me llamo Angel y mi apodo es 'Ladegast', un constructor de órganos alemanes del siglo XIX.
Tengo 61 años. Me gusta la astronomía y la observación terrestre. Tengo una buena colección de binoculares de potencia fija y variable, pero me seduce la idea de tener un buen equipo de alta potencia para telescopios terrestres.

From Google Translate: Hello everyone, friends of Birdforum, First of all please forgive my English, it is automatically translated, so be patient. I'm new to this forum, my name is Angel and my nickname is 'Ladegast', a 19th century German organ builder. I am 61 years old. I like astronomy and earth observation. I have a good collection of fixed and variable power binoculars, but I am seduced by the idea of having good high-power equipment for ground-based telescopes.

Suelo configurar un Mavsutov Orion Chino 90mm/1250mm de focal, adapta el Binowiever Auriga al foco primario en línea recta y oculares, 24mm, 18mm, 15mm, 10mm, varía en campos de 60°, 65°, 68° y más rango de pares de oculares...
Busca un equipo potente con buenas lentes ED o APO. o un Sporting Scope, estaba pensando en dos equipos "Celestron c5, un Smith-Cassegrain luminoso y un Mavsutov 127mm oscuro pero con muy buena potencia para observación de (barcos en alta mar, aviones, montaña, ornitológico, y selectivo en barridos generalizados) .

From Google Translate:
I usually configure a Mavsutov Orion Chinese 90mm/1250mm focal, adapt the Binowiever Auriga to the primary focus in a straight line and eyepieces, 24mm, 18mm, 15mm, 10mm, vary in fields of 60°, 65°, 68° and more range of pairs of eyepieces... Look for a powerful device with good ED or APO lenses. or a Sporting Scope, I was thinking of two "Celestron c5" equipment, a luminous Smith-Cassegrain and a dark Mavsutov 127mm but with very good power for observation of (ships on the high seas, planes, mountain, ornithology, and selective in generalized sweeps)

Tengo buenas monturas y trípodes de alta gama.
Que telescopios me podrían recomendar... para terrestres, todos con posibilidad de adaptación con Binowiever... Con dos ojos estoy muy adaptado incluso en astronomía a este campo de observación, ¿O algún monocular? ? de gama decente??.
Si tenéis algún enlace o recomendación será muy bienvenido. Sin más preámbulos un saludo a todos.

From Google Translate: I have good high-end mounts and tripods. What telescopes could you recommend... for terrestrials, all with the possibility of adaptation with Binowiever... With two eyes I am very adapted even in astronomy to this field of observation, or any monocular? Decent range??. If you have any links or recommendations it will be very welcome. Without further ado, greetings to all.

 

[delia todd]

Hi Ladegast and a warm welcome to you from all the Staff and Moderators. I have translated your message as all posts should be in English. And in view of your questions have moved your post to the Telescope forum.

I'm sure you will enjoy it here and I look forward to hearing your news.

From Google Translate: Hola Ladegast y una cálida bienvenida de parte de todo el personal y los moderadores. He traducido tu mensaje ya que todas las publicaciones deben estar en inglés. Y en vista de tus preguntas he trasladado tu post al foro del Telescopio. Estoy seguro de que lo disfrutarán aquí y espero con ansias escuchar sus noticias.

 

[Binastro]

Hi Ladegast and welcome.

There is at least one large telescope on Tenerife that an amateur has and maybe rents out.

There may also be one on La Palma.

There are frequent visits from astro groups to both these islands.

You could ask at the professional observatory on Tenerife, but be careful, I almost fell in the Caldera on a pitch black night.

It helps to be high up for astro work but for terrestrial views not so important.

I used a Celeston C5 SCT there but a 127mm Maksutov Cassegrain would work, but they both vary in quality.

Personally I used a custom built 150mm Maksutov with oversize primary.
There are 150mm and maybe 180mm Skywatcher Maksutov Cassegrains but the big one can take a long time to cool.
Some have fans.

Depending on your budget a 120mm ED or 150mm ED refractor would perform best.
There are two or three element objective versions.
Although it has chromatic aberration the 150mm f/8 doublet non ED Skywatcher refractor works quite well and is inexpensive.
Two of these have been made into binocular telescopes.

I also used y 317mm custom Dall Kirkham on a very large tripod.

A Celestron C8, C9.25, C11 or C14 would work well.
The C9.25 is usually optically better as it has a longer f ratio.
My friend used an old Criterion US made 8 inch Schmidt Cassegrain telescope terrestrially for viewing islands 2kms or 3kms away with good results.
I think most of the above can be used with binoviewers, although I preferred one eye use.

Another friend uses a 420mm f/17? windowed Dall Kirkham with thin edge mirror for amazing astro work. He always uses a binoviewer This would also work terrestrially.

It depends on your budget and whether you view from a fixed location or want to move about.

It also depends on the magnification you want to use.
Some of the above are not so good at low magnification.
It also depends how good the Seeing or atmospheric quality is from your viewing position.
It helps to look downwards from a high position.

Regards,
B.

 

[Binastro]

For aircraft I use a Canon 18x50 IS or a 10x25 binocular.
I also used a 73mm f/14 refractor on a wooden tripod at 53x and 80x and a 25-40 x55 drawtube refractor hand held at 25x.
I have followed aircraft for over 320km from overhead to near Scotland when they were flying at 55,000ft height.

For ships up to 30km and all nearer objects I used the 150mm Maksutov f/10 at 95x with a Porroprism erector.
I got excellent results looking at islands up to 5km away.
Usually at 20km to 30km there were mirages with an upside down ship above the actual ship.
A very heavy ex gov tripod was used that could support 75kg.

I could sometimes see land 60km to 70km distant.

Sicily has been seen from Malta and vice versa at 110km. With church steeples and car headlights seen.
Using a 65mm refractor.

Regards,
B.

 

[Ladegast]

Hola Ladegast y bienvenido.

En Tenerife hay al menos un gran telescopio que un aficionado tiene y quizás alquila.

También puede haber uno en La Palma.

Hay visitas frecuentes de grupos astronómicos a ambas islas.

Podrías preguntar en el observatorio profesional de Tenerife, pero cuidado, casi me caigo en la Caldera en una noche muy oscura.

Estar en altura es útil para el trabajo astronómico, pero para las vistas terrestres no es tan importante.

Allí utilicé un Celeston C5 SCT, pero funcionaría un Maksutov Cassegrain de 127 mm, aunque ambos varían en calidad.

Personalmente utilicé un Maksutov de 150 mm construido a medida con cañón primario de gran tamaño.
Hay telescopios Maksutov Cassegrain Skywatcher de 150 mm y quizás de 180 mm, pero el más grande puede tardar mucho tiempo en enfriarse.
Algunos tienen fans.

Dependiendo de su presupuesto, un refractor ED de 120 mm o ED de 150 mm funcionará mejor.
Hay versiones objetivas de dos o tres elementos.
Aunque tiene aberración cromática, el refractor Skywatcher doblete no ED de 150 mm f/8 funciona bastante bien y es económico.
Dos de ellos se han convertido en telescopios binoculares.

También utilicé un objetivo Dall Kirkham personalizado de 317 mm sobre un trípode muy grande.

Un Celestron C8, C9.25, C11 o C14 funcionaría bien.
El C9.25 suele ser ópticamente mejor porque tiene una relación más larga.
Mi amigo usó un viejo telescopio Schmidt Cassegrain Criterion de 8 pulgadas, fabricado en EE. UU. UU. UU., en tierra para observar islas a 2 o 3 km de distancia con buenos resultados.
Creo que la mayor parte de lo mencionado anteriormente se puede utilizar con binoculares, aunque prefiero usarlos con un solo ojo.

Otro amigo usa un telescopio Dall Kirkham de 420 mm f/17 con ventana y espejo de borde fino para realizar trabajos astronómicos increíbles. Utilice siempre un binocular con visera. Esto también funcionaría en tierra.

Depende de tu presupuesto y de si quieres ver desde una ubicación fija o si deseas moverte.

También depende del aumento que quieras utilizar.
Algunos de los anteriores no son tan buenos con aumentos bajos.
También depende de qué tan buena sea la visibilidad o la calidad atmosférica desde su posición de visualización.
Ayuda a mirar hacia abajo desde una posición alta.

Saludos,
B.

For aircraft I use a Canon 18x50 IS or a 10x25 binocular.
I also used a 73mm f/14 refractor on a wooden tripod at 53x and 80x and a 25-40 x55 drawtube refractor hand held at 25x.
I have followed aircraft for over 320km from overhead to near Scotland when they were flying at 55,000ft height.

For ships up to 30km and all nearer objects I used the 150mm Maksutov f/10 at 95x with a Porroprism erector.
I got excellent results looking at islands up to 5km away.
Usually at 20km to 30km there were mirages with an upside down ship above the actual ship.
A very heavy ex gov tripod was used that could support 75kg.

I could sometimes see land 60km to 70km distant.

Sicily has been seen from Malta and vice versa at 110km. With church steeples and car headlights seen.
Using a 65mm refractor.

Regards,
B.

Hola Binastro.
Gracias por tus respuestas a mis demandas en cuanto a adquisición de un telescopio terrestre.....
Cierto, Binastro, Magnificos telescopios en las Islas de Tenerife y La Palma y muchos acantilados..., si hay que tener cuidado...y curvas , y también grupos de rutas en materia de astronomía, podría preguntar... .
Si,en el campo de astronomía en las Islas tenemos el factor altura, aquí en las Islas tenemos muy buenas cotas de alturay eso es predominante y crucial en astronomía no tanto en terrestre que también.. que es lo que estoy buscando... , yo resido la isla de Gran Canaria la más masificada y turística un desastre! en cuanto contaminación lumínica,por otro lado las nubes o mar de nubes se estanca a 1500m en la zona norte, así que zona Sur-Oeste es magnífica zona para observación astronómica y bortlet 3.
En mi caso yo trabajo y resido en zona Bortlet 7 es mediocre pero se puede obtener infinidad de objetos de "cielo profundo" cuando la madre naturaleza nos da tregua... (seeing-trasparencia, turbulencia atmosférica se da la cábala perfecta) , yo estoy en un punto de ubicación de márgenes de casas con luz parásita pero diseminado no uniforme , para astronomía, suelo utilizar y trabajo con equipos el sistema solar, (luna y planetas con un Mavsutov90mm y 180mm) y para barridos de cumulos globulares y abiertos y nebulosas y estrellas dobles de cielo profundo con binoculares. 30mm, 42mm, 50mm, 60mm, 65mm, 70mm,80mm,85mm, de potencias fijas a diferentes aumentos de bajo, medio y alto aumento,
Y BT APM 100mm semi-apo 45°
Y BT APM 120mm semi-apo 45°, de oculares intercambiables, estos dos últimos equipos son increíbles! a bajos y medios aumentos,las estrellas son puntiagudas y puntiforme me encanta estos equipos en Bortlet 7 jugar con estrellas dobles es magnífico y rinde muy bien en cielo y terrestre, mejor el 100m en este campo en terrestre con 2,8° de campo de visión. Pero el 120 se merienda al 100mm en cielo profundo.
En un futuro..próximo... 2025 o 2026 tengo una configuración para mi edad..., adquirir una montura AyoDigi2 altazimuthal con un 6"Refractor ED f/8 APM con Binowiever para estrellas dobles y objetos de cielo profundo en visual, ahora hay que ahorrar dinero hasta que llegue su momento... Para estos "Equipos de ataque rápido en visual" en montaje... y desmontaje... mi edad me pasa factura. Gozar.... Pasarlo bien...
Pero a lo que busco ahora, es que voy a un equipo de telescopio en terrestre.... , podría rondar un coste los 700 o 800 euros nada más que en el tubo óptico para adaptarlo a un binowiever y por cierto estaré ubicado en casa,y salidas o desplazamientos serán muy puntuales, tengo buen campo de observación en casa a 7 km la costa y se ve la mar magnifica y una generosa panorámica de montañas , hoy mismo desde mi casa he visto la isla de Fuerteventura con el equipo de foto que he subido al hilo, las condiciones no eran idóneas, en cuanto a turbulencia atmósferica.. pero si jugaba un papel idóneo la transparencia.
Estoy viendo dos equipos portátiles y para casa como un Celestron c5 y el Mavsutov 127mm para terrestre por supuesto también optaría para campo astronómico, pero quiero jugar en profundidad con estas focales con algún reductor focal que ganaría en grados de campo pero no creo que en luminosidad en cuanto a un Mavsutov, no se el Smith - Cassegrain.
Bueno Binoastro gracias por todas tus respuestas y Magnificos equipos.. que me haz comentado y nombrado son señores telescopios esas aberturas y diámetros y calidades ópticas.
Un saludo

Ladegast

 

[Binastro]

Perhaps someone can help me with a Google translate of the reply, as I don't understand it properly and don't know how to Google translate.

I understand perhaps half.

Regards,
B.

 

[Binastro]

Thank you to who ever provided the translator possibility.

I would think that your refractors would be good for terrestrial viewing.

A 150mm APM refractor would be good also.

Also the 180mm Maksutov Cassegrain.

I am much older than you and here it is much worse than Bortle 9.

Although when I was younger things were much better.

I am not sure a 127mm Maksutov or SCT would be that great unless you find a really excellent example.

Enjoy your viewing.

Regards,
B.

 

[Ladegast]

Thank you to who ever provided the translator possibility.

I would think that your refractors would be good for terrestrial viewing.

A 150mm APM refractor would be good also.

Also the 180mm Maksutov Cassegrain.

I am much older than you and here it is much worse than Bortle 9.

Although when I was younger things were much better.

I am not sure a 127mm Maksutov or SCT would be that great unless you find a really excellent example.

Enjoy your viewing.

Regards,
B.

Thank you very much Binoastro, for your advice and experiences, and for feeling my machine English.
All the best.

 

[wllmspd]

Are you looking for lightweight and easy to carry? What sort of magnification are you looking for? How fixed on binocular viewing are you?

No commercial spotting scope is likely to have enough focus travel for adding a binoviewer.

As you know astronomy refractors can give good optical quality for lower prices than spotting scopes and let you choose your eyepieces. You could add a binoviewer, though you might need the magnifying adapter to reach focus that would limit the minimum magnification. Compared to spotting scopes they are also heavy and less fun to carry around the place.
I swapped an 80mm ED refractor (3.5kg) for an Opticron mm60ed (1kg), I lose some magnification and apparent field of view, but I could carry it around with a lighter tripod all day long more easily.

A 15x image stabilised binocular might work, though you will not be able to change the magnification.
If you want a two eyes view- I see you have several large binoscopes which must give great view - have the 70mm APM binoscope, which is light enough to carry around for very nice spotting views, though it still weighs about as much as the 80mm refractor or 127mm Mak.

Readily available high quality translation is such a useful tool, to remove language as a barrier between people of similar interests. Sounds like you like in a great place to make use of your scopes and binoculars.

Peter

 

[Ladegast]

Are you looking for lightweight and easy to carry? What sort of magnification are you looking for? How fixed on binocular viewing are you?

No commercial spotting scope is likely to have enough focus travel for adding a binoviewer.

As you know astronomy refractors can give good optical quality for lower prices than spotting scopes and let you choose your eyepieces. You could add a binoviewer, though you might need the magnifying adapter to reach focus that would limit the minimum magnification. Compared to spotting scopes they are also heavy and less fun to carry around the place.
I swapped an 80mm ED refractor (3.5kg) for an Opticron mm60ed (1kg), I lose some magnification and apparent field of view, but I could carry it around with a lighter tripod all day long more easily.

A 15x image stabilised binocular might work, though you will not be able to change the magnification.
If you want a two eyes view- I see you have several large binoscopes which must give great view - have the 70mm APM binoscope, which is light enough to carry around for very nice spotting views, though it still weighs about as much as the 80mm refractor or 127mm Mak.

Readily available high quality translation is such a useful tool, to remove language as a barrier between people of similar interests. Sounds like you like in a great place to make use of your scopes and binoculars.

Peter

Hi Peter, thanks for your answers.
True, I'm looking for an affordable terrestrial telescope for a fixed point at home, and some stealthy outings.
And what about magnification? with capacity for high magnifications without losing much image quality, although it is known that with more magnifications there is less light, but I am used to working at 83x or 125x with my small Mavsutov 90mm and binowiever, but with good atmospheric quality you can make large sweeps in the mountains or sea and "you don't lose much contrast but you do lose light" and some "field of vision".
Are you asking me if I am very used to a binowiever?
The truth is that with two eyes there is an optical balance and relaxed on land. It would be ideal. Although you could see opting for a monocular.
True Peter, a refractor is very good and cheaper than a terrestrial telescope, but it is longer and not very fun for the future, and for home it is fine, but for outings you have to go with a mount and tripod.
I have never had an image-stabilized binocular, they are very good for astronomy, but you cannot change magnification, I have heard very good things about these devices.
If a 70mm binocular with good quality lenses is a very versatile device, of course I like the mount and tripod very much at 15x and 20x for terrestrial and dark skies and 11x for black skies.
I am hesitating between these two devices, the Celestron c5 and a Mavsutov 127mm. Here you can play well... and you can adapt a binowiever and a 6.3 focal reducer from Celestron. In the case of the Celestron and the Mavsutov you can adapt an "adapter ring" to attach a focal reducer. You would gain some field of view but not light. OK, could it be a light high-power device? I have a doubt... Smith - Cassegrain or Gregory Mavsutov?
True, Peter, the translation should be better.
Yes, I am in a privileged place as far as nature is concerned. This morning I got up early to see the sunrise and I went to a town in the north of the island and the transparency was brutal! The sea was a pool and not a single wave. I took an APM 12x50 ED-Apo binocular to observe. The island of Tenerife, which is 80 km away, looked sharp with intense contrast to the naked eye and the houses and mountains were magical with the binoculars. I can't complain. This afternoon it was filled with clouds. The islands have many contrasts. I can't complain.

 

[Binastro]

Hi Ladegast,

My best magnification with a very good Skywatcher 90mm Maksutov is 135x for viewing at 120 metres. The detail in a crow's eye was amazing.
I don't use a binoviewer, although I have one.

At 3 a.m. terrestrially I used 3 identical 120mm refractors at 250x at 7.5km distance. I could resolve the one arcsecond marks on a clock tower.
On many mornings of good Seeing.
This is over parks and houses.
My vantage point is 10m above the ground and the clock tower 25m above the ground.
I open the bathroom window for one or two hours before viewing to stabilise the temperature and have no heat currents and wear a lot of clothes, an anorak and a scarf around my face so my body heat does not affect the image.

I used 20x60, 20x70 and 20x80 binoculars, all selected from several samples.
My main binoculars were 12x45 and 12x50.
Now I use Canon 18x50 IS and Canon 10x42L IS.

The 317mm windowed thin edge Dall Kirkham was used at 265x and 400x for planets and 600x for Jupiter's moons.

The 127mm Maksutov Cassegrains vary in quality. The actual aperture is about 118mm and it helps to put black material in the drawtube.
The Celestron 5 also varies. It might have a bigger secondary, but both lose light and resolution because of the secondary.

If you have a 100mm ED refractor that should be as good or better than these 127mm mirror scopes.
If you have a 120mm ED refractor definitely better.
So viewing from home I would use the refractors in the daytime.

If you want to move around then a really good 127mm Maksutov or SCT would work on a good tripod.
It depends if you use a car to travel or walk.
I used my 150mm Maksutov on a very heavy tripod but carried it in the car.
The bottom of the tripod legs were secured with a very strong long chain.

If you have a 100mm ED refractor that may work for travel from your home.

My 127mm Maksutov and 127mm Celestron are not very good optically, but some people have good samples.

The 150mm Maksutov f/10 is good at 95x. I have seen Enceladus from a city balcony.
The 150mm f/15 Maksutov is good at 250x.

The Pentax 100mm f/12 demonstrator refractor was very good at 300x and tested well at 400x.

Regards,
B.

 

[Binastro]

As Peter says, a light weight spotting scope may be the answer if you are walking.

My most used telescope is a custom made Jaegers 123mm rich field telescope.
It has a 3 inch drawtube.
At 16x the field is 4.7 degrees.
My most used magnification is 80x with an RKE eyepiece.
20x Erfle 2 inch fit 3 plus degrees.
35x 2 degrees 6 element eyepiece.
100x ortho eyepiece.
145x 4.3mm Swift ortho.

At 100x it showed 13.1 magnitude stars from a city suburb in the 1970s.

210x with a 3mm Clave is too high.

It is on a wooden one piece legs garden tripod and is light weight but cannot be carried very far because of the size of the tripod.

Regards,
B.

 

[Ladegast]

As Peter says, a light weight spotting scope may be the answer if you are walking.

My most used telescope is a custom made Jaegers 123mm rich field telescope.
It has a 3 inch drawtube.
At 16x the field is 4.7 degrees.
My most used magnification is 80x with an RKE eyepiece.
20x Erfle 2 inch fit 3 plus degrees.
35x 2 degrees 6 element eyepiece.
100x ortho eyepiece.
145x 4.3mm Swift ortho.

At 100x it showed 13.1 magnitude stars from a city suburb in the 1970s.

As Peter says, a light weight spotting scope may be the answer if you are walking.

My most used telescope is a custom made Jaegers 123mm rich field telescope.
It has a 3 inch drawtube.
At 16x the field is 4.7 degrees.
My most used magnification is 80x with an RKE eyepiece.
20x Erfle 2 inch fit 3 plus degrees.
35x 2 degrees 6 element eyepiece.
100x ortho eyepiece.
145x 4.3mm Swift ortho.

At 100x it showed 13.1 magnitude stars from a city suburb in the 1970s.

210x with a 3mm Clave is too high.

It is on a wooden one piece legs garden tripod and is light weight but cannot be carried very far because of the size of the tripod.

Regards,
B.

Hello Binoastro.
Very interesting all your experiences..... With all these astronomical equipment that you have mentioned, the Mavsutov Skywatcher 90mm at 135x for your optics, "that is an eagle's eye to hunt the crow's eye" you will have to infiltrate some astronomy house like ENS-optics UK or others in Europe to see if there is any Gregory Mavsutov Meade ETX125mm or 100mm Etx equipment with good optics or the old Intes Mavsutov 5", these small Russian tanks have excellent optics are revealing... to know the views with the Mavsutov 150mm at 95x from the balcony are very good, quite an odyssey... , the Mavsutov 150 f/15 is another story at 250x, I could investigate the "Maksutov MC 140/2000 OMC Carbon Deluxe from Orion Optics UK they have very good reviews. I am also rethinking, as you speak very well of me, a 100mm ED Refractor from my hideout could be an option... and also for outings... the free light generated by these refractors and the best optical quality are for greater achievements... They are immaculate, if mother nature helps us... in a diamond time, to be able to obtain achievements.
You speak to me of the Jaegers 123mm refractors, I don't know their focal length..., but if they are rich in fields they will be short, a lot of benefit can be obtained with low and medium magnifications, I don't know how it will go at high magnifications... There is one that could be a candidate TS-Optics 152mm f5 9, but I already have my BT APM 120mm semi-apo 660mm binoculars that at low and medium magnifications works wonderfully, making wonderful sweeps. I remember a couple of months ago seeing the Mu draconis doubles in Draco, it was spectacular "two lighthouses in time" or Cadwell 64 in Scorpio, a jeweler! And the doubles in Capricorn all the objects in Sagittarius and Scorpio this summer were luxurious wide field with APM eyepieces 24mm 65°=27.5x,
18mm 65°=36.6x
15mm 65°=44x
12.5mm 84°=52.8x
10mm 60°=66x
The truth is that a good quality refractor can generate one of the best options, I have in mind in 1 year and a half or two years maximum the acquisition of the "AyoDigi2" mount for two optical tubes in line or one for binoculars and optical tube so I will be considering a 100ED and of course a 150 mmf/8 for doubles and weak and open globular clusters, they are amazing... They are quick to assemble and disassemble.
And a 100 ED or 110 can be mounted on Manfrotto tripods that I have with ball heads and it could work wonderfully of course to see how the Mass = tube length behaves so that it has good damping and image stabilization at high magnifications and I'll leave now because it's getting dark in my city and the sky with light clouds and clearings will let me see the constellation of Cassiopeia and Perseus for 2 hours. I'm going to get a TS-Optics 15x85mm binocular, a bright kit that I love.
And at 10:15 in Morpheus' dream tomorrow we'll have to work.
Have a good night Binoastro and thanks for all this information, I'm learning a lot.
Regards.

Ladegast

 

[Binastro]

Hi Ladegast,

The Russian and Soviet Maksutovs are heavy but can be very good optically.

I have a small one around 65mm or 70mm. Astele?

But the c.1950 or 1955 100mm Soviet Maksutov has the best optics I have seen. It is unbelievably good.
It has a very low serial number with one digit and must have been made by a master optician.
It is perhaps equalled by the Pentax 100mm f/12 refractor or Horace Dall's 8 inch Maksutov and his 108mm f/30 Camera Obscura corrected for four colours.

I have also a Mirador 70mm Maksutov with 30-120 zoom or 1.25 inch eyepieces. It is also extremely good.

The UK Orion Maksutovs are well respected and I think you can get enhanced coatings.

If you go by car or even bicycle or motor bike a good 100mm ED refractor will probably outperform the 127mm Maksutovs, which are only 118mm.
Maksutovs need oversize primaries. The front diameter isn't the true aperture and they can be vignetted inside also.

You have several options.

At home you can use heavy optics and heavy mounts.

If you travel you have to think about weight, size and how you travel and also about five or ten years time and whether they are light weight.

Also IS binoculars are very good for astro or terrestrial observation if you get a good example.
They aren't perfect, but nothing is.

Regards,
B.

 

[Ladegast]

Hi Ladegast,

The Russian and Soviet Maksutovs are heavy but can be very good optically.

I have a small one around 65mm or 70mm. Astele?

But the c.1950 or 1955 100mm Soviet Maksutov has the best optics I have seen. It is unbelievably good.
It has a very low serial number with one digit and must have been made by a master optician.
It is perhaps equalled by the Pentax 100mm f/12 refractor or Horace Dall's 8 inch Maksutov and his 108mm f/30 Camera Obscura corrected for four colours.

I have also a Mirador 70mm Maksutov with 30-120 zoom or 1.25 inch eyepieces. It is also extremely good.

The UK Orion Maksutovs are well respected and I think you can get enhanced coatings.

If you go by car or even bicycle or motor bike a good 100mm ED refractor will probably outperform the 127mm Maksutovs, which are only 118mm.
Maksutovs need oversize primaries. The front diameter isn't the true aperture and they can be vignetted inside also.

You have several options.

At home you can use heavy optics and heavy mounts.

If you travel you have to think about weight, size and how you travel and also about five or ten years time and whether they are light weight.

Also IS binoculars are very good for astro or terrestrial observation if you get a good example.
They aren't perfect, but nothing is.

Regards,
B.

Hello Binoastro.

True, the Russian and Soviet equipment are of exquisite optics and built like tanks for visual, these Mavsutov Klevtsov systems like the Maksutov-Cassegrain 8" TAL-200K f/10 speak very well of them for visual, now very heavy.., or the Tal 100 RS refractors or 5" TAL-125R Refractor Double achromatic telescope but with very fine optics and warm vision and also in its APO version, so they are still made in one of the Russian plants that now works for the army in "RUSOPTICS (Alatyr Ltd)".

Yes, the Astele were not seen in Spain but they were full of a lot of reputation for their optical quality, the truth is that I do not know which is the Soviet Mavsutov 100mm Telescope from 1950-55, that is really hitting the bull's eye with those optics! Given the low numbering, it would have to be a magnificent Optical Master, what a luxury.

I am almost in the market for a 100mm ED or 110mmED refractor with focal lengths of 7.8 or 11. I have seen a TS-Optics 102mm f11 ED with very good reviews and a binowiever can be attached to it. I will study the subject. There are usually some offers coming soon for the holidays and it may be the option. I will apply the advice you have recommended.
Have a nice day.