I currently have a few (ok... five) lenses that are uncorrected for chromatic abberations and which, of course, make focusing quite difficult. I am aware of the focusing correcting meant to remedy this persistent problem, but it's still a bit of a crap-shoot, even on the Puyo lenses with the focusing scale (although they definitely help). Somewhere, I seem to remember hearing that using a yellow (I think) filter can bring the chemical and visual focus together.
The science here is somewhat over my head and I was hoping that someone (anyone) with any experience could share with me the best way to go about using colored filters to help save me some film (oh, I should mention that I'm using x ray and l ortho lith film).
Thanks everyone!
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