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Message: <blockquote data-quote="Brian" data-source="post: 254336" data-attributes="member: 17621"><p>I have not noticed any shutter capping issues on mine, which is one of the first 2000 or so made. I've taken maybe 1000 pictures with it, ISO from 100 to 20,000. I usually go for a higher shutter speed, a lot at 1/4000th at low ISO. The shutter is microcontroller-controlled electro/mechanical. If it caps only at High ISO then the problem is firmware based. If the problem is on the mechanical side, then it is the shutter itself and it should not matter what the ISO is set to. I've also used the camera in 5Farenheit, no problems with the 55/1.2 wide-open shooting pictures of ice covered trees. I've had shutter capping problems on several cameras, mostly those from the 1930's through the 1960's using horizontal travel cloth shutters. If the Df starts capping, back to Nikon. If my SP started capping, I have the service manual and would adjust it myself.</p></blockquote><p></p>