10-17-2014, 09:35 AM
pRICE cUBE wrote:
The previous lens was a work necessity. This other lens would be more for the enjoyment of photography without haling around a 9 lb. lens.
Thank you.
I'm pretty good in the Long Lens category, but I could really use a fast Wide-Angle.
The Quality ones aren't cheap. But they aren't in the Mac Pro pRICE category either.
Geometric Distortions are easy to deal with now, but I can't abide Chromatic Aberration. This is just due to the historically bad designs.
The Perkin-Elmers Cats that I mentioned earlier, at least the good NASA green wrinkle-finish ones, and not the flat black Vivitars, were APO lenses. It wasn't so much color that we were concerned with; we shot B&W. But CA leads to smearing, especially at the peripheries. This could be bad. We wanted precision at the peripheries. (We also used Rodenstock APO Process Lenses. They had a flatter field, but with a loss of one stop in speed. There were times that every Photon counted.)
Bevatron Beam 26 Streamer Chamber. Rodenstock APO 760mm F13 Lens. 8x12 Tri-X film.
You mention not hauling around a 9 pound lens. But Fast, Long, and Light is a specialized field. A field relegated to the Catadioptrics in the past.
But maybe I am drawing conclusions. Maybe you, just for fun, may be looking into Astrophotography, Microphotography, Spectral Analysis, Kerr Cells, or something even more exotic.
It is easy to blow ~$3K on just a good Evaporated Nickel Diffraction Grating.
(I'm just having some fun, this early Friday morning. No offense intended.)
My Best to You, pRICE cUBE.
¬Eustace