prinzflex auto 2x converter
hope somebody can help me i just bought a cheap prinzflex auto 2x converter off ebay it is a PK fitment, my understanding was i would connect it to my KR attach my 200mm lens and hey presto i would have an instant 400mm lens, but no i attached it and my lens but when i switch on there are no F numbers and when i take a photo it is just blank, i have put the camera in manual mode but can't select the aperture is there a setting i need to adjust in order to make this work
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