I don’t enter many juried exhibitions but I make it a practice to enter one of the Center for Photographic Art exhibitions every year. I support the organization in many ways, and I do this to stay connected with them. I’ve been on the inside, and I’ve seen how arbitrary judging these things can be…. [Read More]
Sony a9 write speed & battery draw
This is the 25th in a series of posts on the Sony a9. The series starts here. There has been quite some controversy about the Sony a9 write speed with fast cards, with people having difficulty reproducing other’s results. Some of the problem has been with differences in methodology. I explained my current methodology in… [Read More]
Sony a7RII FW 4.0 star-eating
I interrupt the a9 experiments to bring you a special report on the new firmware release for the a7RII: 4.0. There have been several rumors floating around in cyber-space: The star-eating at exposures of 4 seconds and longer is fixed. The star eating is not fixed The star-eating is worse. The star-eating is now a… [Read More]
Worst-case Sony a9 self heating
This is the 23rd in a series of posts on the Sony a9. The series starts here. In this post, I tested a fairly severe a9 use case and found: A rise over ambient looked like it was going to get to about 17 or 18 degrees C above ambient. A time constant of about… [Read More]
Worst-case Sony a9 battery draw
This is the 22nd in a series of posts on the Sony a9. The series starts here. I set the integration time on the DMM as high as it would go and went in search of the worst-case battery drain conditions. I couldn’t find any mode that cause sustained drains of over an ampere. The… [Read More]
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