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mixiユーザー(id:22801157)

2020年02月17日12:34

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Transplantation old lens Hexanon 49/1.9

50 years old Hexanon 48mm/f1.9 was removed from a silver salt film period camera Konica S2 model successfully. Hexanon 49mm/f2 lens has been already transplanted on SONY E-mount few days ago and the concept at that time was smaller and lighter as possible. Following that all the unnecessary parts had been removed except iris control and helicoid mechanism, but the moving is not straight but rotating.
The performance of 49mm Gaussian 6 elemnt 4 group lens is enough to satisfy my requirement with surprise. It's potential is above words, probably it is level or exceeds same size Leitz M-Summicron 50mm/2.
Very cheap priced at 500 yen exhibition Konica S3 model in Yahoo Auction obliged me to try 2nd attempt, these are why I determined to proceed inter-plantation with similar lens.
This time I'll try to keep an original figure as much as possible, so shutter charging lever and lens shutter mechanism and outer case would be remained as it is, helicoid rotating angle would be increased for more close up shooting.
Original flange back 28mm depth, that of SONY E-mount 20mm and utilizing body cap thickness 7mm allows me relatively easy way on physical relations, it means the tolerance and adjusting area is remained 1mm.
As the first step has cleared, next is fixation of helicoid outer ring on body cap flange with establishing infinity lens module position. Much consideration would be required to hold straight moving helicoid holding guide pin construction?
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