Hi folks,
Recently, a K 50 f/1.2 fell into my lap (love that Craigslist!). And I'm wondering about the unmarked half (?) stop between f/1.2 and f/2.
In the Forum Lens Reviews I see references to this stop as being f/1.4. Can anyone confirm this? How do you know for sure? Is it documented somewhere?
In the lens booklet / user manual that came with my lens, it mentions unmarked half stops for "lenses with a non-standard maximum aperture", but doesn't include the 50 f/1.2. For example, on a K 135 f/2.5, the stop between f/2.5 and and f/4 is f/3.4. And on K lenses with a maximum f/3.5 aperture, the next click is f/4.8.
Based that info, I'd think the f/1.2's next stop would be closer to f/1.7..?
Anyhow, yes, as a practical matter it makes very little difference one way or the other. But, the lens geek in me needs to know!
Thanks,
Tim
Last edited by .a.t.; 03-22-2011 at 05:48 PM.
Reason: clarity