3/14/2021 0 Comments Sigma Serial Number Date Check
Three bytes support 16.8M unique numbers. Canon has produced a lot more lenses than that since they started coding this number into their lenses.It just seems to me that the OP is making a simple task difficult for no reason.
Labels can also become worn down so that they become unreadable. Also, if it can be confirmed that particular equipment saves serial numbers in image metadata, it can be used to track stolen equipment if the new owner uploads any images. Canons own Digital Photo Professional does not display the lens ID number, either. The 5D Mark III I use regularly also includes the internal lens serial number in the EXIF info. My older Canon EOS 7D and Canon EOS 5D Mark II do not include the field, even when the same lenses are used on both sets of cameras. When an older lens model that does not communicate an internal lens ID to the camera is used on one of the newer cameras, the field is reported as 0000000000 (ten consecutive zeros). This is even the case with a newly made copy of an older lens design. The Canon EOS 5D Mark III reports the internal Lens serial number as 0000000000. It is presumed by many to be a number that is uniquely assigned to only one lens ever made by Canon. At the very least, it is almost certainly a number that is unique for all copies of that particular lens model. Canon probably uses a separate internal serial number in order to standardize the format for all of their various lens lines, which can vary significantly in terms of the number of digits included in the external lens serial number. There also seems to be at least some cases where the same external serial numbers have been used for two different lenses in two different model lines. As has been the case several other times, Canon started silently making half of a system with compatibility for a feature to be introduced in the other half a couple of years later. Canon appears to have started including the internal serial number in lenses sometime around 2004-2005 before introducing the camera bodies that could use the information in 2007. No one, other than those on the inside at Canon, had a clue the bodies they already owned included this ability until the first IS lens was introduced in 1995 and Canon released a list of existing models that already had compatibility with IS built in. Another example: For several years before the release of the 470EX-AI, Canon bodies as early as the EOS 7D Mark II introduced in late 2014 included the needed firmware to control the new self aiming bounce feature of the flash that was introduced in early 2018. Canon made no public announcement about the ability included in these camera bodies (7DII, 1D X II, 5Ds5DsR, 5DIV, 6DII, Rebel T6i750D, Rebel T6s760D, Rebel T7i800D, 80D, 77D) until they announced the new 470EX-AI flash in early 2018. It does seem quite likely that, since Canon seems to have only started programming internal serial numbers into the firmware of their lenses about 15 years ago, and based on the 10 digit length that uses both numbers and letters (for 36 potential characters for each digit - thus there are 3610 available numbers), that they have not remotely approached using all of the 3.6 quadrillion available combinations. Over the past 4-5 years, Canon has celebrated a 10 million lens milestone each year. Sigma Date Check Full Set OfAt the current production rate of 10M per year, a full set of 10-digit serial numbers with 36-characters available per digit will be exhausted about 365 million years in the future. But I dont think Canon actually uses it for globally unique numbers. The examples I have seen all seem to use three bytes or less. Canon has produced a lot more lenses than that since they started coding this number into their lenses.
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