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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Recent content by agus_m

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    Wide flat field and edge sharpness an illusion?

    By the sweet spot I mean the percentage of the apparent field of view that is sharp. Normally the EII is like 60% of its field sharp, but stopped down, it was like 100%. It was like a dim NL Pure. Of course, because of this tiny exit pupil, proper eye placement becomes very important. If the ipd...
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    Wide flat field and edge sharpness an illusion?

    A couple of days ago I tried to stop down the objectives of my binoculars down to ~1cm to see if my IPD settings were fine (if you can't see with both eyes at the same time, it means the IPD is not properly set). I am aware that for my Nikon EII 8x30, the exit pupil of would be around 1.25mm...
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    Wide flat field and edge sharpness an illusion?

    I really wonder if back then (or even now), optical engineers took this into account when designing wide field eyepieces. Whenever you take a picture through the eyepiece (I tried with my Nikon EII and Aculon) all the field looks sharp and in focus when it is aligned with the optical axis...
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    Why do you need a wide field of view for birding?

    Wow, so the Habicht at 7x magnification has the same FOV as the NL Pure at 12x. Does the Habicht have so much more contrast than the NL to justify this sacrifice and the soft edges?
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    Mid-level 10x50 (Maven B6) vs Alpha 10x42 (Noctivid)

    I didn't get a couple of things: Why would you want a 10x50 Noctivid if you have never tried one? What is the problem with Zeiss and Swaro, and Abbe-Koenig prisms? Like the other people said, these sound like odd requisites and leave almost no options left. Perhaps if you could clarify the...
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    Hard case for MHG 10x42

    Hi again, this bino is the one I use the most, and I have it in my backpack all the time. I think the cordura case that comes with it is nice, but not super protective. Sometimes I am on the bus, crammed like sardines with other passengers, I also go trekking and hiking, and I have to carry a...
    • agus_m
    • Thread
    • 10x42 case hard case monarch hg
    • Replies: 1
    • Forum: Nikon
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    Brief comparison berween MHG VS EDG '8X42'

    Interesting observation, I wouldn't have expected that. I thought the SF was an improvement or equal to the FL, which has almost zero CA. Furthermore, the edg is quite smaller than the SF. But at the same time, the SF has less lenses in the objective, this could compromise the CA correction.
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    Visual effects in binoculars when used with polarisers

    The water reflections are partially polarised, sometimes it can be 100% polarised. Maybe when you rotate the binos, the prisms change the polarization.
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    Monarch M7 8x42 problem

    It doesn't really bother me when I watch a bird. I only notice it when reading text. Besides, it is hard to get the precise ipd setting, once set I never want to touch it again.
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    Comparing 10x32 NL with 8x42 NL, some (not ground breaking) thoughts...

    Okay, I think I now understand what you are saying. In another example, 8x42 vs 10x42, if our pupils are 2.5mm, the 10x bino would squeeze the light a bit more so it doesn't matter if both binos collect the same amount of light, with the 10x, a greater percetage of this light actually goes to...
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    Monarch M7 8x42 problem

    But the problem happens whenever you use both eyes right? I got a kind of similar situation with my Monarch HG 10x42. Whenever I look at something close like a few meters, it looks very good. However if I look at text at the same distance, it looks a bit blurry. When looking through each tube...
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    Vignetting in Binoculars

    Interesting discussion. Are we talking about a vignetting of the edges when looking at the center of the FOV, that we cannot detect? Or when we roll our eyeballs and look at the edges, or both? I assume this vignetting would only happen in dim lighting, otherwise in bright light our pupils would...
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    52mm NL Pure release date estimate?

    The wx's afov is considerable larger than the ISO calculated value of 76 degrees. The actual value was measured around 85 degrees, there is a recent thread about this discrepancy on cloudy nights.
  14. A

    Speculative 10x30/32 question

    That depends on the user, you also pay way less for 90% of the performance of an alpha. Some people are willing to pay 3x extra for that 5-10% difference. I remember another thread where you praised the subalphas like Trac Torics, according to you, why would someone spend $3000 for an alpha when...
  15. A

    Nikon EII general question- Zeiss or B&L framed bino?

    Very nice, do you have more of these xray images posted somewhere? I am curious to see other bino designs, it should be easier to do xray images rather than make binocular cutaways.
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