tale #69

[richardHaw]

https://imaging.nikon.com/history/story/0069/index.htm?fbclid=IwAR0py-HQfFgtaczNzc6Cd71T2kVw7dXW6Al9MVNvEUhGhuqzvtl-Fo-YSag

shared by mr Sato himself on our FB group. 

that's where I pester him to make lenses that I like such as an AF Sonnar for the Z 

[chambeshi]

Great. Thanks very much 

Glad to learn Sato San is still doing what he excels at!

[Birna Rørslett]

Fortunately, it's possible to decouple the mechanism that closes down the aperture as the magnification increases. This avoids the problem of being stuck with f/32 nominal at 1:1 and the quality loss that the small opening entails. In order to be able to set aperture in this case, the lens has to be CPU-modified ('chipped') with the CPU in G mode. One can still use the ring flash feature.

I have a Medical 120 modified in this manner and I believe there are a couple others floating around as I have delivered CPUs for several projects. Erik [Lund] might have one too.

[Roland Vink]

Thank you, that is very interesting. The AI 200/4 micro from the same time would seem to be a similar concept - a telephoto lens for closeups with inner focusing - but the optical designs are quite different.