Originally posted by Digitalis I never said split screen focusing aids were not good enough. I said they aren't designed for lenses this fast, there is a difference.
In your original post you said:
Quote: I'm using the stock K10D screen
while bitching about how hard it was to nail focus with the 50/1.2.
To that I replied:
Quote: With a monster like 1.2, shouldn't you invest in a split prism focus screen?
To which, you answered (I'm assuming this was in reply to my post):
Quote: I'll also point out that split prism focusing aids usually aren't designed to be used with f/1.2 lenses - even Leica rangefinders aren't really designed to focus the noctilux f/1.0
Now, correctly me if I'm wrong, but I interpreted that to mean that you haven't gotten a split prism focus screen because it's not good enough for you (or, at least, the 50/1.2). That's what I don't understand.... you have this monster bright lens, mounted on a camera that has (I'm sorry, but my K20D had one, too) an UTTER CRAP screen for manual focusing anything faster than f2.8, and that's why I suggested a split prism screen.
Can it nail focus with a Noctilux? Probably not; but what are your options on a K10D and a K50/1.2? Bracket focus? Sure, but you'll have much better precision if you do a "rough" focus with a split prism screen first.
Quote: but they are terrible for situations where extreme precision is needed.
And that's why you're sticking with the K10D stock screen????
I'm sorry, but I can't see any scenario where the stock screen will be better... or even remotely close to being as good as my KatzEye with OptiBright doing manual focus.
I guess what I'm trying to say is this: I got a KatzEye so that it'll
help me manual focus all my fast-ish primes (Super-Tak 50/1.4, Flektogon 35/2.4 and everything in between), and it has served me well. It may not be the be-all and end-all solution, but I am
always better off with it using my fast primes than without.
I see all the reasons for getting a split prism screen for primes f1.4~2.8 also apply to a 50/1.2 prime (even if it meant you have to stop down to f1.4 when nailing focus under time constraints is crucial). So why won't you consider it?