macdonaldz Posted May 10, 2013 Share Posted May 10, 2013 picked up this guy on ebay a few weeks ago. glass is in immaculate condition. super lightweight. no focusing helicoid - 2 separable optics and a set screw to retain them. came with a mounting bracket that i epoxied a 67-58 stepdown onto and screwed a 52-67 step up onto it and the plastic 50 canon. maintaining alignment is a pain but can create some cool mesmerizer effects. no focus marks. minimum seems to be about 4'8" words from tony - "one they did had a grove cut out so you could move the 2 optics closer together or apart. losen the screw and push in or pull out.. you will then have to orientate the front optic so it is sharp very fiddly but quite good glass on some of them [...] they made many different sizes it was made in a fot shop in south london in the 1970s so kind of hand made nothing was standard" pic of setup 2 flare tests charts w/o petra on canon plastic 50mm 1.8 w/ petra - taking lens must be focused closer - may have some kind of built in diopter as it doesn't see to like infinity that much Quote Link to comment Share on other sites More sharing options...
highres Posted May 24, 2013 Share Posted May 24, 2013 Hi Zach, did you ever shoot any video with it? I see one for sale on ebay now, I can only find one video on vimeo but it's not HD. Makes it hard to judge sharpness or overall characteristics. Quote Link to comment Share on other sites More sharing options...
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