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  1. J

    Kowa announces 1.6x extender for small body scopes!

    Hi, yes, the tfov will have to be divided by 1.6 when using the extender, so 23m @ 1000m... Merry Xmas, Joachim
    • jring
    • Post #28
    • Forum: Kowa
  2. J

    Advice for a scope

    The MCII is the one giving 25-75x on the 82mm body... this is the one you want. There is also an older MC zoom giving 25-56x on the 82mm... See the following links for some the more current fieldscope classic EPs... https://imaging.nikon.com/sport-optics/lineup/scopes/mc/...
  3. J

    Advice for a scope

    Hi, on ebay no returns is kind of the norm... so you can only open a case with ebay if the item is not as described... like arrives broken or obvious stuff like a pair of bins out of collimation despite described as working... So you would have to rely on Nikons reputation to have delivered ok...
  4. J

    Lost collimation by disassembling binoculars

    Hi, first of all, welcome to BF! And yes, as has been pointed out, one of the ways to collimate binoculars is by eccentric rings holding the objectives... so it is a very good idea to mark their original position before unscrewing the objectives... which comes a bit late.. Good to hear your...
  5. J

    Advice for a scope

    Hi, if you cannot try before you buy, my would either want an online shop with a no questions asked return policy or maybe get a Nikon off ebay for their track record of being ok or better... not sure if we really had a Nikon lemon here... sure, some were just ok and not very good. This ED82...
  6. J

    What scope is this ?

    Hi, a wide angle zoom needs a wider mounting hole which the Nikon classic fieldscopes don't have. The so called field stop diameter in the eyepiece limits the true field of view of an instrument. Joachim
  7. J

    Fujinon scope

    Hi, first of all, welcome to BF - and congratulations to your adaption! I have some doubts about the 30x magnification with the 20mm 68deg EP though - that would mean a 600mm focal length which is kinda unusual for an 80mm scope. Those tend to be in 400-500mm range. So unless your scope body...
  8. J

    Newbie looking for some real world reviews/input

    Hi, seems to be a fairly new scope from Opticron, who are very well regarded here... If you get it, we would love to get some impressions... PS: There is a Zeiss diascope 85 with EP and stay-on-case in the classifieds for 599 quid... in Cornwall if you wanna try in person... which I would...
  9. J

    Newbie looking for some real world reviews/input

    Hi, not so many comments on Hawke on here... never have used one personally... I'd probably go full size used... and get some used CF legs and a 500AH head for the rest... and maybe a mulepack... https://www.lcegroup.co.uk/Used/Opticron-ES-80-GA-ED-SDL-Eyepiece_416853.html Joachim
  10. J

    Newbie looking for some real world reviews/input

    Hi Jack, first of all, welcome to BF! My advice for you is the following: - you want a scope with an ED element in the objective because of... physics.... If that is not an option, you want a fixed wide angle EP of around 30x magnification as that works best with plain glass achromats. -...
  11. J

    Tripod rest

    Hi, or use a mulepack... Joachim
  12. J

    Is 40x zoom enough

    Hi, I would disagree on this generalization... there might be circumstances where this is true... like bad seeing (heat haze), a not so great instrument or, as in the case of the 501, 40x being at the limit where a very fast plain-glass achromat will not get really sharp any more due to...
  13. J

    Kenko Greenfield 80... anybody know ?

    Hi, as you stated, very few infos to be found outside of Japan. From one product video found on google, it looked to be single coated, which does not help especially with the stack of glass called zoom eyepiece. It didn't say ED anywhere, so probably a plain glass achromat which will be best...
  14. J

    What to upgrade from Opticron MM4 60 : Leica, Swaro, Kowa?

    Hi, my general advice would be to test an example and buy exactly that example, if to your taste - either in a brick and mortar store, online with a no questions asked return policy or used in a face to face transaction. Either take an artificial star (DIY or bought), observe at 20-30m and do a...
  15. J

    This is true ? Noctivid have optical glass used on space program ?

    Hi, fact check, first of all, for an optical glass, the transmission in % depends on the thickness of the element. So without a thickness given, the 99.9% are kinda meaningless. I will assume 1mm here for an order of magnitude which fits lenses in binoculars. But they are also very easy to...
  16. J

    Would Swarovski agree to change the color of my armor

    Hi, first of all, welcome to BF! I can't think of a technical reason why they can't as the model seems to be available in both colors. If asked nicely, I could imagine that they will do this... but please keep us posted... Joachim
  17. J

    Kowa 66A Performance Observations & Questions

    Hi, yes, you might not be able to see whether it's crisp if the image is too dark, but observe the same object at the same range in better lighting conditions and it will look quite different. Joachim
  18. J

    Kowa 66A Performance Observations & Questions

    Hi, as has been mentioned, the minimum requirement for an ok example of an ED (or in your case fluorite crystal) scope is to deliver a crisp image at 60x or whatever is the max magnification of the zoom EP. Also there should be an easy to find point of best focus. All that in good seeing aka no...
  19. J

    Barlow lens for Nikon Fieldscope ED82A (also applies to ED82, ED78 etc.)

    Hi, first of all, welcome to birdforum! Unfortunately I am not aware of a barlow lens or 3.5mm EP fitting the Nikon fieldscope classic series and due to the narrow EP mount, adaptions are not easy. You could help by measuring the EP mount thread and protruding barrel diameter and length -...
  20. J

    8x32 Dilemma?

    Hi, had quick look at the usual suspects (Cleyspy, InFocus, London Camera Exchange and Ace Optics) for used 8x32... One up from the Trini HD... and this one is small and light... at the cost of eye relief, so best used w/o glasses...
  21. J

    8x32 Dilemma?

    Hi, first of all, welcome to birdforum! Two questions, before we start: - do you or your wife wear glasses while using the bins? If yes, we need to check for sufficient eye relief. - are used bins an option? In the UK there are quite a few reputable dealers that offer used glass at good...
  22. J

    Effect of Magnification on Light Output from a Binocular

    Hi, the simple argument makes sense to me and the measured results match it - a physicists dream... In this broad daylight scenario though, one of two things is going to happen in real life: the brain will be able to adapt to the different lighting conditions and make you perceive a perfectly...
  23. J

    Eyepiece 1.25" Wide angle?

    Hi David, I assume that most 100 deg EPs are used in your TMB as they're 2"? Or did you find a way to make them work ok on spotters with your adaptions? Joachim, who got a cheap ES 100 deg 9mm and the space window effect is nice... but truth be told the useful field is not a lot larger than a...
  24. J

    Choosing 10 x 42 Binoculars

    Hi, first of all, welcome to birdforum! In my opinion getting a 10x42 pair to complement an SFL 8x40 with a budget of 800 aussie dollars is kinda futile unless you are patient and lucky and manage to get a super cheap used SE 10x42 from somewhere for 500 USD or thereabouts... like me many...
  25. J

    A question about Fieldscope differences and pitfalls of shopping on eBay for used scopes.

    Hi, as for the seller doesn't want to take it back - one could try to use ebay buyer protection. I have used this maybe a handful of times for a few hundred ebay buys... and iirc all were successful. One example was actually a pair of bins, advertised as working and exhibiting a severe case of...
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