Making abstraction of the 10% brightness difference between a 4.2 mm and 4 mm exit pupil for dawn or dusk observations (i.e. your eye pupil being larger than 4.2 mm) you should keep in mind that the 10x42 view may not look brighter than that of the 8x32, but you will nevertheless have better...
I have the Kowa BD 8x25. I think they're nice binoculars giving a good image, and with just the right size and shape for comfortable handling despite being small and light. Quite good build quality. Nice compact pouch too that makes them easy to stow away in a bag or large coat pocket.
There's a Conquest 8x50 that's been on eBay since forever.
I know about the narrower FOV and the lower light transmission compared to later Zeiss binoculars, but other than that, how would this one rate compared to current 8x42 binoculars in the €1K price range?
Nice report, and a very interesting comparison.
There isn't anymore the need for guessing the eye relief now that Pinac has objectively measured them all:
16 mm for the 8x42 SF : https://binocular.ch/zeiss-victory-sf-8x42/
14 mm for the 10x54 HT : https://binocular.ch/zeiss-victory-ht-10x54/
I never had the Dialyts but a friend at university bought one, end '80s. I was green with envy ;-) Very peculiar instrument, I often think about that first viewing session with it. It had massive angular magnification distortion; I'd never seen that before.
It would very much surprise me if the Absam Ring has anything to do with a wavefront error on one of the optical elements. It is just unlikely that there would be a localised gross grinding/polishing error.
More likely in my opinion is that it is an interaction between spherical curvature of...
In 44 years of using various binoculars, I've never seen a perfect single circle as the combined FOV. My right eye has a different correction than the left eye, as I found out in my early 40's when I suddenly needed reading glasses. But I still don't use glasses when looking through binoculars.
All true, but the OP asked about dark hours and then, given his young age, it is the exit pupil that counts. The 8x56 will be twice as bright, give or take the few % difference in transmission. This assumes an eye pupil size of at least 7 mm in the dark.