Originally posted by ll_coffee_lP Can I be so bold as to ask what you plan to shoot at this resolution? I'm very curious in what you are hoping to achieve.
Well. I am a curious person. I think one has to keep an open eye at any scale to get some good shots. The level of magnification I am talking about means subjects which pass unnoticed to the unaided eye. Unlike 1:1 macro subjects which you would identify as good subjects.
So, I do not yet know what I will discover.
What I am hoping to achieve is photography which is novel (to a certain extent at least). Besides technique, this means searching for new subjects as well.
Originally posted by troyz Have you tried using a lens with a shorter focal length (e.g. reverse a really good 20mm-ish lens onto your 300) to get a greater magnification (instead of optimizing the resolution at the lower magnification)? [...]non-retrofocus rangefinder lens
No, but maybe it is a good idea. I didn't limit my quest to SLR lenses. Physically, it's resolution which matters -- only. The focal length is irrelevant. Of course, a larger magnification means an even smaller field of view not making things easier
Which is why shorter focal length should be accompanied by better resolution as otherwise, you only get more blur.
E.g., the 24mm Canon lens was remarkable. But the 35mm Zeiss even more and at equal resolution, the Zeiss would enable better photography.
Following your suggestion, I have looked at some of those, e.g., the Leica Elmarit-M 21mm f/2.8. (f/4 lenses cannot be as sharp as the 35mm Zeiss which is sharper at f/2.8 than at f/4!). Leica publishes MTF figures and to my disappointment, the 40 lp/mm MTF isn't better at f/2.8 than at f/5.6. Still no competitor to the 35mm Zeiss.
Zeiss itself claims that their SLR lenses resolve up to 300 lp/mm and their rangefinder lenses (ZM series) up to 400 lp/mm. So, they are somewhat better indeed. But which of the ZM lenses is the top performer? Maybe, the Biogon T* 2,8/21 ZM?
Any concrete lens suggestion?