Is it really safe to do this? Do you think the fog created from our breath might introduce oil or something?
I never dared to breath onto the lens for that reason.
|Has anyone ever used the 50mm f1.4 AI? is it just as sharp as the AF version?
I have the AI-S version. But in general (unless you get a dud copy, but as far as I remember, I never heard anyone got a dud copy of 50mm 1.4 before), 50mm 1.4 is a sharper lens compared to 50mm 1.8
From my own experience, the 1.4 within the range of f/1.4 to at least f/5.6 is sharper compared to 50mm 1.8 (and maybe a bit more contrast)
Some people said that from half the aperture onwards until it's fully stopped down, the 1.8 is sharper, but I very rarely shoot large apertures.
But whatever version is, if you don't mind spending a bit more, 1.4 is worth it.
Okay, since I'm not at work today and got nothing to do, I did a quick sample test for you. I'm not really a brick or chart shooter, and don't really like to do sample tests, but here goes: (I know the result will be more accurate if I shoot text or chart, but I prefer apples
All shots done with tripod (duh!), focusing was on the little red apple picture on the sticker. No apples were harmed during the shot (well at least not yet).
I didn't touch anything but had to resize them and did "save for web" so they won't take so much space.
And this is the 100% crop of the focus area. Again, might not be as obvious as charts, but apples are good for you. (probably the difference is a bit more obvious if I didn't compress the file)
You can see from the picture, even at 1.4, it still gives you enough sharpness. What I notice more if you increase the aperture a notch (F/2), the contrast increases quite a lot.
But if you really wanna "bring up" what 1.4 can do, you won't worry so much about extra sharpness or additional contrast.
I personally think the key potential of 1.4 is the ability to create a "dreamy" feeling in a picture, not to shoot charts or apples.
Well, I can actually make dreamy apple shots but I'm too lazy at the moment.