This is a bit of a trickier one to find and explain. If you have all zoom lenses, you will not find this on your lens. If you have a prime lens, especially an older model you may see an extra ring of numbers on your lens such as in the image below the numbers in the middle radiating out from the central orange line.
You use the hyperfocal distance scale to know which parts of your image will be in focus at different aperture settings. Notice the lens above is set to f16 and it is focused at 5m 15 ft. Now look at the middle scale and go to f16 on the left side of the orange line — that is indicating the closest point that will be sharp when focused at that distance, using that aperture — in this case it looks like about 2. So what we can tell from this is that at f16 we can get from about 9ft to infinity in focus, but the trick is to focus in the right spot.
When shooting with infrared film you actually had to focus at a different place than normal because the infrared spectrum of light is different than what we see with our eyes. The long, narrow Canon lens date code chart is shown on the right side of this page.
They have posted what they predict to be the future date codes for Canon lenses. Please keep in mind that this is a work in progress and may not yet be definitive. See the date code chart at TDP.
Search titles only. Search Advanced search…. Search Advanced…. Log in Register. Install the app. New media New comments Search media. Canon RF Lens Roadmap. Simply consult the table below to find out when it was made. The other letters indicate batch number, as well as the actual serial number of the lens in question. If you have a slightly older lens, or one that has not yet succumbed to the serial number phenomenon, you can also work out how old it is by looking at the marking on the black plastic by the lens mount.
Generally featuring a six digit combination of letters and numbers, the first letter indicates what factory it is made in U for Utsunomiya, Japan; F for Fukushima, Japan; O for Oita, Japan , while the next one is the year of manufacture. Again, please send us any discrepancies you find. Special thanks go out to the friends of the site that played a role in the development and maintenance of this chart.
Until phasing out the practice starting in , Canon included a date code beside the rear lens element of many but not all lenses note that some manufactured lenses still received this date code. The date code as seen below is in the form of " UR ". This code is also present on some other Canon products including camera bodies. The first letter, "U" , indicates that the lens was made in Canon's Utsunomiya, Japan factory.
Prior to , this letter is moved to the last position of the date code. The second letter, "R" , is a year code that indicates the year of manufacture.
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