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p.1 #1 · p.1 #1 · Zeiss, Infinite focus play, their response | |
To settle any question about Zeiss infinity focus play, at least for their 35/2, here's the response. I decided to make a new thread in case someone does a search in the future.
First, my quesiton to Zeiss on my 35/2 infinity "slop":
I just received my Zeiss 35mm f/2 lens in Canon EOS mount. I have it attached to a 5D mark II camera. Everything works wonderfully except infinity focus.
Although the distance marker stops at the infinity symbol, it appears long-range focus moves PAST infinity - I must back off the lens about 1-2 mm to achieve sharp focus at infinite targets, and I have verified this using 10x magnified live view.
Is this normal?
The response:
Dear Customer,
Thank you for your inquiry to Carl Zeiss.
Some play in the focus ring at infinity and beyond is possible. This avoid problems with the infinity adjustment when tolerances of the flange focal distance of the camera body are to high. 1mm sounds ok 2mm is probably to much. But when you don`t have an application where you need a reliable stop at infinity (eg aerial photography) this doesn`t matter at all. If you like to have an alternate adjustment we would need camera and lens to do this kind of service. Then we could change the flange focal distance in a way that the focus ring stops at infinity.
Hoping to be of service to you we kindly ask you to contact us again should you need further assistance.
Sincerely,
Andreas Bogenschuetz
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