Archives for August 2015

I’ve had a couple of questions about the long exposure noise reduction (LENR, aka dark-frame subtraction) in the a7RII. I’ve had to do some research, since I never have used this function in any alpha 7 camera. It’s not that LENR is useless, just that its usefulness is limited, and that the kind of photography… [Read More]

The Sony alpha 7 R Mark II (a7RII) has a new autofocus system that combines contrast-detection and phase autofocus with about 400 (the mind reels — how do they cover these up in the raw files?) phase detection autofocus points. The new system has eye detection added to the old face detection, which I never… [Read More]

In this post, we saw a pronounced self heating effect in the dark noise of successive 30-second exposures with the Sony a7RII. I repeated the test with the predecessor camera, the a7R, and found far less effect. A reader postulated that the difference might be lower thermal conductivity between the sensor and the camera chassis… [Read More]

In the previous post, we saw a pronounced self heating effect in the dark noise of successive 30-second exposures with the Sony a7RII. I repeated the test with the predecessor camera, the a7R. I set the camera’s shutter speed to 30 seconds, which is as long as it will go. I set the shutter mode… [Read More]