10X plan apo
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10X plan apo
I'm looking for a 10X plan apo to do some photography of crystals. Ideally it should be 160 mm tube length infinity objective. I've looked around on ebay but haven't found what I'm looking for. Any suggestions?
Don Parsons
For minerals I would try to have a long working distance and therefore use a 10x Mitutoyo plan apo.
For infinity the tube lens changes the magnification and the image circel. If you use Mitutoyo m plan apo 10x with a 200 mm tube lens focused at infinity you have 10x on sensor and aprox. 30 mm diameter good image circel on sensor. With 160 mm tube lens you have aprox. (160/200)*10 = 0.8*10 = 8x on sensor and 0.8 * 30 = 24 mm good image circel.
Hope this helps
Best regards
Jörgen Hellberg
For infinity the tube lens changes the magnification and the image circel. If you use Mitutoyo m plan apo 10x with a 200 mm tube lens focused at infinity you have 10x on sensor and aprox. 30 mm diameter good image circel on sensor. With 160 mm tube lens you have aprox. (160/200)*10 = 0.8*10 = 8x on sensor and 0.8 * 30 = 24 mm good image circel.
Hope this helps
Best regards
Jörgen Hellberg
Jörgen Hellberg, my webbsite www.hellberg.photo