谜一样的老K

晨枫

东湖珞珈 发表于 2016-5-11 09:57
我叛变PENTAX很久很久了，虽然曾经非常满意他家的SMC镀膜，非常满意他家的客服。曾经因为一点小破事，我写 ...

叛徒东湖现在有机会回归革命队伍了。

pcb

包子 发表于 2016-5-12 01:08
那120的由来是胶片宽度20mm?

120卷的宽度是60mm

至于为毛叫120
from wiki
Who gave 120 film the name "120" and why?
Kodak did, and the number was arbitrary: they started with 101, and it was the 20th film size they'd introduced.