On the a7S, the silent shutter completes an exposure faster when you set the camera to APS-C mode. How about the a7RII in the same mode? If the following graph makes no sense to you, look here. 10 milliseconds/division. I count 5 divisions. That’s 50 milliseconds, or 1/20 second. About half again as fast. That’s… [Read More]
Archives for August 10, 2015
How fast is the Sony a7RII silent shutter?
The Sony alpha 7 Mark II (aka a7RII) has a silent shutter mode. When running silent, the mechanical shutter is on vacation: the sensor does all the work. The mechanical shutter is a rabbit, completing an exposure in 1/250 second (for shutter speeds faster than that, a slit moves across the sensor, but it takes… [Read More]
Sony a7RII lowpass filtering in various shutter modes
I received a request to look at what, if any, lowpass filtering the a7RII performs on dark-field images at ISO 100. Dark field images are mostly Gaussian noise at higher ISOs, although they can contain low-frequency energy do to pattern variations. A standard technique to remove the pattern variations is to subtract two dark frames… [Read More]
Sony a7RII EFCS & silent shutter sharpness
The data in yesterday’s post was pretty noisy, but it seemed to indicate that somehow the silent shutter mode on the Sony alpha 7 R Mark II (a7RII) might produce images that were slightly less sharp than the electronic first curtain shutter (EFCS) mode. I foolishly speculated that the reduced bit depth of silent shutter… [Read More]