In order to compare the a7R and the D800E’s sensor-level shutter release blur, I combined some of raw images from the last three posts into two images that show both camera’s performance with the same vertical and horizontal scales. To review, the two setups were: Zeiss 135mm f/2 APO Sonnar ZF.2 on a Nikon D800E,… [Read More]
D800E shutter & mirror slap testing with an oscilloscope, part 2
Yesterday, I reported on camera vibration with the Zeiss 135mm f/2 APO Sonnar ZF.2 on a Nikon D800E in landscape orientation. See that post for details on the test setup. Today I show results with the camera in portrait orientation, flipped on its left side using the RRS L-bracket. The direction of the oscilloscope trace… [Read More]
D800E shutter & mirror slap testing with an oscilloscope
I set up this gear: Zeiss 135mm f/2 APO Sonnar ZF.2 on a Nikon D800E, RRS D800 L-bracket, Arca Swiss C1 Cube, RRS TVC-44 legs. Release with electrical contact closure from Cognisys rail controller. ISO 100, lens set halfway between f5/6 and f/8. The resultant images were processed in Lightroom with default settings except for… [Read More]
More oscilloscope a7R shutter slap testing
I’ve improved my “flying spot” shutter slap testing setup by adding a mirror. The technique involved mounting a camera on a tripod and photographing a distant oscilloscope set up with its vertical input grounded, and the horizontal time base set to a value that gave four to eight divisions of movement in the time that… [Read More]
A plea for leaf shutters
Iliah Borg’s comment to one of yesterday’s posts got me thinking. After saying that a firmware fix for the a7R’s shutter slap didn’t look likely, he made a passing remark: “Maybe this type of camera needs a leaf shutter.” The more I think about it, the better the idea sounds. Leaf shutters are quiet. Leaf… [Read More]
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