This is a continuation of a series of posts on the Sony a7III. You should be able to find all the posts about that camera in the Category List on the right sidebar, below the Articles widget. There’s a drop-down menu there that you can use to get to all the posts in this series; just look for “a7III”.
SONY Alpha shutter/image counter This tool will provide the number of shutter actuations that the camera has made up to the file in question. ONLY ORIGINAL JPG or ARW files STRAIGHT from the camera will work. SONY A7III Body + SONY FE 50mm F1.8 Lens + HOYA PRO1 UV Filter + SONY Camera Bag. Excellent Condition, Like New. No Scratches or Dent. The Shutter Count for this Camera is 258.
In the past, I’ve measured the scan time of electronic shutters by photographing an analog oscilloscope trace of the output from a function generator. That was effective, but it took a while to set up and was a difficult experiment for some people to understand. So when I tested the scan time for the a7III this morning, I used a quick-and-dirty method: photographing light from an LED that’s modulated at 120 Hz. I used single shot compressed raw.
Because the light is modulated at 120 Hz, the stripes are 8.33 milliseconds apart. We can count them and see that there are a bit more than seven stripe intervals from the bottom to the top. So, the scan time is a bit over 60 milliseconds or about 1/16 second.
We saw in yesterday’s testing that the precision drops in compressed raw when the shutter is set to continuous high drive mode. That’s a downside, so there must be an upside. Does the shutter scan faster in that mode?
Indeed it does. Now there are a hair over 4 stripes. Call it 35 milliseconds, or 1/28 of a second.
There’s some slop in this measurement technique. I would guess that the scan times would be a factor of two apart, so maybe they’re really 1/15 and 1/30 second.
A simple tool to check Sony A7iii shutter life
The easiest way to find the shutter count on the Sony A7iii camera is by using the free tool Exiftool. This command line utility works on both Windows and MacOS computers. First, download either the Windows executable or MacOS package from Phil Harvey’s website. Then follow the instruction on the site to setup the tool. Next, take a photo with your A7iii and copy it to your computer. On a Windows command prompt or a Mac terminal window, run the exiftool command and pass the name of your image to it. For example, on a windows command prompt, it will look like this:
As you can see, the tool extracts information from an image file taken with the Sony A7iii. About two third of the way down, you will see a line with the keyword “Image Count”, as seen on the following screen shot:
The camera used to take this example image has a shutter count of 1392. You may have notice that there are 2 other rows with the “Image Count” keyword, and they all display the same shutter count value. To my knowledge they always show identical values.
Any alternative and free tools?
Shutter Count For Sony
Another free tool for checking Sony camera shutter count is picmeta. I have have seen it working on previous Sony cameras such as the A7ii and A6300. It is a Windows based visual tool and it is even easier to use than exiftool. Unfortunately it does not report shutter count for the A7iii - it displays zeros all the time. Call of duty ghosts directx 10 patch.