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.