I purchased my Horseman 450 used, Mint condition but used non the less, and I'm wondering, how do I know if I have a fresenl lens. Does it replace the gg, or i s it on the rear standard in addition to the gg. I can focus fine with the gg n ow, as it is. But the visibility changes with the angle that I look at it with.
Any thoughts would be appreciated.
Clark
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