I have recently bought a Sigma 600mm mirror lens for my Eos 10D. I am mainly interested in nature photography and sea life (dolphins, whales). As my budget was limited I didn’t go for “big glass” preferring to have longer reach with a small package. Are there any tips out there for using a mirror lens and how to increase contrast, the single largest problem of this type of lens? I know all the usuals (tripod, mirror lock up, shoot early etc) for image stability so am looking for some real secrets here on how to get maximum image quality from maximum budget telephoto! Any info would be appreciated… Also, any experience form other users of mirror lenses would be great.
Try my sharpening/contrast enhancement actions at http://visual-vacations.com/Photography/PhotoshopGoodies.htm
Convert the image to 16-bit RGB, adjust the levels and color balance as desired, then run the Midtone Sharpen 16 LAB
action. The first time the USM dialog appears, adjust the amount to get the desired level of contrast. The remaining times, adjust the amount to get the desired amount of sharpening. Don't change the radius or threshold values.