Pinhole Lens

since: 2017/10/22
update: 2018/01/14
reference:
1. Skink Stainless Steel Pinhole Pancake PRO Kit for Contax / Yashica SLR
2.  Contax G ( G1 & G2 ) LaserDrilled Pinhole lens lomo rangefinder GK-B EX3000
3. Contax Yashica CY C/Y Laser Drilled pinhole Lens SLR LOMO
4. long exposure compensation charts

A. Contax G

   pinhole: 0.2mm(diameter)
   viewing angle: 69 degree
   equivalent lens for a 35mm camera: 28mm
   f stop: f160

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B. Contax Yashica CY

   pinhole: 0.3mm(diameter)
   viewing angle: 52 degree
   equivalent lens for a 35mm camera: 44mm
   f stop: f147