To understand the condition of a Canon DSLR camera you need to use its three counters: Shutter Count, Mirror Count, and Total Count with the Shutter / Mirror Replacement Histories. Together, they are the cameras odometer / mileage indicator.
Although there are 3rd party softwares that claim to read Shutter Counts, in our experience what they are reading is ‘Total Count’. This causes confusion for owners, sellers and buyers. The best way to verify the information of 3rd party software for a customer is to connect the camera to our Canon Service Adjustment Software and print the Camera FAX Report for them.
Our Canon Service Adjustment Software is the ‘ONLY’ software that can do a deep dive into the camera, read all three counts AND the Shutter and Mirror Replacement Histories. It is both simple and automatic!
Our Canon Serivce Software even imports this information into the Camera FAX! Just click ‘Camera FAX Report’ and print it as a pdf and email it to customers.
Shutter Count records the number of activations of the ‘current Shutter’.
DSLR owners shoot allot of pictures, so shutter replacement is a common service. Each time the Shutter is replaced the Shutter Count should be reset to make the count accurate for the new Shutter.
To change the Shutter Count:
- Type in the new count number … ‘0’.
- ‘Click’ Change and the new Shutter count will be written into the camera.
* If your camera records Shutter History, it will also record the Shutter replacement date.
Mirror Count records the number of activations of the ‘current Mirror Unit’.
Although less common, Mirror Unit replacement is a standard repair service, typically with professional users and serious photo buffs. Each time the Mirror Unit is replaced the Mirror Count should be reset to make the count accurate for the new Mirror Unit.
To change the Mirror Unit Count:
- Type in the new count … ‘0’.
- Click ‘Change’ and the new Mirror count will be written into the camera.
* If your camera records Mirror Unit History, it will now record the Mirror Unit replacement date.
Total Count records the number of activations for the camera.
The Total Count is a record on ‘All’ activations on that camera. If the Shutter or Mirror Unit have been replaced, the Total Count is different then the sum of Shutter + Mirror Counts.
With earlier Canon DSLRs displaying a different Total Count was the only way you would know that the Shutter or Mirror had been replaced. A little confusing and open to interpretation!
Later Canon DSLRs recorded both Shutter and Mirror Unit Replacements Histories and dates of replacement. This gives the owner, seller and buyer a full view of the camera - its Camera FAX Report.
Normally you should not change the Total Count! But if necessary use one of the following methods.
Cameras with a 'Change' Button next to the Total Count
To change the Total Count:
- Type in the new Total count.
- Click ‘Change’ and the new Total count will be written into the camera.
* These cameras will have a ‘Change’ button next to the Total Count.
Cameras without a 'Change' Button next to the Total Count
To change the Total Count:
- Reset the Shutter or Mirror Histories inside the Shutter Plugin
- Correct the Shutter or Mirror counts until all Counts are correct.
* These cameras will NOT have a ‘Change’ button next to the Total Count. They will have the Shutter and Mirror Histories records in the Shutter Plugin.