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the last word

Photography meets digital computer technology. Photography wins -- most of the time.

You are here: Home / Archives for a9

Sony a9 write speed

June 13, 2017 JimK 7 Comments

This is the 24th in a series of posts on the Sony a9. The series starts here. When it comes to SD cards for the a9, there are two kinds of fast: On the right, a card that used to be the state of the art when it came to SD card speed. It’s rated… [Read More]

a9

Worst-case Sony a9 self heating

June 11, 2017 JimK 1 Comment

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]

a9, The Last Word

Worst-case Sony a9 battery draw

June 10, 2017 JimK 10 Comments

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]

a9, The Last Word

Sony a9 battery drain vs display mode

June 10, 2017 JimK Leave a Comment

This is the 21st in a series of posts on the Sony a9. The series starts here. I’ve had some questions about how the display mode on the a9 affects the drain on the battery. In the a9, as in the a7x cameras, there are 3 display modes. The default mode is for the camera… [Read More]

a9, The Last Word

More on Sony a9 battery draw

June 9, 2017 JimK 1 Comment

This is the 20th in a series of posts on the Sony a9. The series starts here. Let’s take a look at the current draw for a complete power up to power save mode, with the power save timer set to 10 seconds: The vertical scale is about 200 ma/division. At the left, the camera… [Read More]

a9, The Last Word

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