Matt_1193
26-Aug-2000, 17:10
Some time ago I posted questions regarding mounting a set of Congo 180mm lens ce lls in a shutter. I was able to get a response from Yamasaki Optical regarding t his. The following was their response:
"Thank you for your inquiry. If the lens elements were mounted on a Copal NO.3 shutter, the distance between the front and rear flange is 28.6mm. The serial number record was already lost,we can't say which design was adopted for the lens but possibility is that the distance between the lenses facing a iris diafragm is 11.37mm.
Best regards Keizo Yamazaki Yamasaki Optical Co.,Ltd. congo@cosmonet.org "
Does anyone know why the distance between cells would be different for an iris ( barrel) vs a Copal #3 ? Or am I not understanding this?
Many thanks,
Matt
"Thank you for your inquiry. If the lens elements were mounted on a Copal NO.3 shutter, the distance between the front and rear flange is 28.6mm. The serial number record was already lost,we can't say which design was adopted for the lens but possibility is that the distance between the lenses facing a iris diafragm is 11.37mm.
Best regards Keizo Yamazaki Yamasaki Optical Co.,Ltd. congo@cosmonet.org "
Does anyone know why the distance between cells would be different for an iris ( barrel) vs a Copal #3 ? Or am I not understanding this?
Many thanks,
Matt