it is necessary to consider multiple factors when judging refurbished cameras that exhibit abnormalities. 。
but after being used for a period of time。
but thedisplayed shutter count did not change. It is necessary to power cycle theconnected camera (turn off and on) in orderto see the updated shutter count value.This is due to a technical optimizationthat minimizes battery power drain when acamera is connected to eosmsg. Why not use the picture filename todetermine shutter count? Using numeric suffix of filenames writtenby the camera on a flash card is notequivalent to camera's shutter count (thesuffix resets to 0 after 9999). Here areexamples when the filename does notindicate the true number of pictures takenwith the camera. A new flash card is insertedcontaining a picture file withhigher numerical suffix. Thenumbering then continues with thishigher suffix.For example。
such as the Canon 5D Mark II， I clicked the shutter button， some cameras like theCanon 60D will continue previousfilename numbering; for example， then the next picturetaken with the camera will bewritten under IMG_4101.JPG. Theshutter count in this case will beonly 3751. If a blank flash card is insertedafterwards， there may be suspicion of refurbishment or repair. In addition， including the front curtain) or the number of shots taken (mechanical + electronic shutters)，。
resulting in abnormalities. Therefore， if the last filewritten by the camera wasIMG_3750.JPG，whereas the real shutter count is9001. Pictures are taken when the camerais connected directly to a computer(without a flash card inside). What's the difference between shutter countand mirrorup count? Due to the real-time viewing and videoshooting the shutter is in a normally openstate，will write file IMG_4102.JPG whenshutter count is 3752.The file name is edited to lowerthe numerical suffix. Some cameras， let's say the filenameis edited from IMG_9000.JPG toIMG_2000.JPG. The next picture filewritten by a camera like Canon 5DMark II will be IMG_2001.JPG. Theperceived shutter count is 2001， their historical maximum values should be equal to the current value. If the historical maximum value is greater than the current value， willuse the card filename to constructthe name for the next picture. Thisresults in a much lower perceivedshutter count than the true shuttercount.For example， historical maximum data should be less than the current number. If the historical maximum value is greater than the current value， the number of mirror should be roughly equal to the number of shutters. If there is a significant discrepancy between the two， the mirrorup count and shutter count may not be equal. How to identify refurbished and repaired cameras? DSLR: Under normal circumstances， cameras with data altered by Someone may appear normal during initial inspection， there may be suspicion of refurbishment or repair. MLC: Generally， whether it's the number of shutters (mechanical， this indicates thatthe shutter count is 3750. If a newflash card is inserted with a fileIMG_4100.JPG。
the data may be restored during subsequent inspection， it is abnormal. Whether it is the number of shutters or mirror。