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60mm performance

Started Feb 13, 2020 | Discussions thread
TangoMan Senior Member • Posts: 1,885
Re: 60mm performance

Resoman wrote:

I bought a used 50mm f2.4 a few years ago, and it's always worked fine. I'm embarking on a project where I'll be copying b/w negatives and will be using the lens near its closest focus distance.

My results today weren't encouraging: good sharpness in the center, poor at the edges. I put my extension tubes on my 50mm f2 and got results that were just as good, but not any better.

I'm pretty familiar with copy work; I spent thirty years as an art museum photographer and realize the importance of alignment in an application like mine.

I"m wondering if my copy of the 60mm isn't quite right. Has anyone on the forum used the 60 in the kind of application I'm describing? How did it do?

If you need absolute optimal sharpness and don't mind a little bit more work, you could take two shots form even closer to the film, one of the left part of the negative and one of the right part and then combine them in software. You would get much higher resolution than anything possible in one shot.

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