Recent content by martim

Hi, thanks for your answer... a reduction of the sharpness is not a problem... A question: why a negative lens? I though about two solutions (but maybe the are not the best choice...) 1. a positive lens (diam. 6 - 10 mm) with a focal as shot as possible... few millimeters, posizioned...

Hi, i have a simple optical system composed of: 1. objective with 50 mm focal lenght 2. CCD camera that can not be mounted behind the objective, for mechanical reasons... it can only be mounted 1-2 cm far behind the objective. So i need to "translate" the focal point of the objective 1-2 cm...