Rashkh wrote in post #16313806
The Zeiss is a 1:2 lens, which will be a hindrance when taking pictures of really small flowers.
Did not know that, thanks. I will bear that in mind when making suggestions.
jefzor wrote in post #16313487
They should all be ridiculously sharp. Especially when you use them at F8 or F11, assuming you want to have any DoF whatsoever.
So this hit's a nerve with me. Not the comment, but at least an issue I have with the 100L. The fact is this lens looses sharpness as you stop down by quite a bit, and a lot more than I'd expect from just diffraction effects. It's still sharp at f8, but I 'feel' like it could/should be sharper.
I wonder if the design was to make the lens sharp at f2.8, which it is, and it sharpens up a bit as you stop down to f4, but then starts to loose sharpness. This is fine for those who want to use it as a portrait lens as well, but for a macro I think you do want it optimized for f8-f11. I don't know much about lens design, so I don't know what it would do to the sharpness wide open, but still. It almost seems like an f5.6 Macro, that was sharpest at f8 would be better, but all the macro lenses are pretty fast.
I don't know if an f5.6 macro would be sharper at f8 than an f2 macro, but I just get the feeling that these lenses are not really optimized for f8 at macro magnifications. I could be wrong though, and it might be that for the price these lenses are about as sharp as can be made at f8.
Having said all that, macro lenses do tend to be pretty darn sharp overall.