ProwlingBoy
Active member
Thank you, it seems fairly certain (based on reading)that with the exception of some of the very first units that the Kowas are a tiny bit sharper and with less CA. I keep reading about a field that is flat enough to cause rolling ball (not super concerning) and a wierd trick where it loses focus at around 70-90% out from the middle and snaps back into focus at the very edge. That would probably bother me a lot if it looked like rings in my view.
Have you observed either issue in the 10x33?
I can't help with rolling ball as I have yet to see it. I tried hard to induce it with a pair of Zeiss FL I tried without success. So I'm either immune to it or am compensating for it without realising it (if that's possible).
I haven't seen the weird trick you mention or observed any rings. But of course everyone's eyes (and brains) are different.
I'm sorry neither of these answers help much.