Thursday, February 28, 2013

Blackmagic Solves Infinity Focus Issue with Cinema Camera, Will Require Hardware Fix


This is a brief excerpt from NoFilmSchool




There have been a number of reports regarding the Blackmagic Cinema Camera and getting proper infinity focus with quite a few lenses. Earlier in the month we showed you a few videos documenting the issue, and Blackmagic so far has been very responsive, telling us at that point that they were looking into the issue. We now have a solution straight from the company, and it looks like it’s going to be a hardware fix if your camera has already been delivered.

Here was the issue, along with one of the worst offenders so far, the Tokina 11-16mm lens:


This was posted by Krisitan Lam in the Blackmagic Forum:

I want to give you an update about this issue.

The cameras are all shimmed and calibrated to 44mm as per the reported focal flange depth of EF mount. I use the term “reported” as Canon does not publish the specifications officially so the exact expected tolerances are not known.

When checked against a collimated cine lens, we expect the Blackmagic Cinema Camera to get accurate focus according to the witness marks on the lens. For example, at focus chart placed 6 ft from the camera sensor plane will be …



By: Joe Marine


Continued… click here!







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