Here is a quick question, how many lenses do you have? More than 1? Great. How do you match each lens with its front and rear lens caps?
I used to put the name of the lens on the cap with a tape (both on the front and the rear ends) but after watching this move from DSLR Video Shooter I think I am going to change to their method.
The problem is simple, if you have several lenses, they are all nice and neat when you start shooting, but by the end of the day, there are lens caps all over the place. Or if you are a bit neater, all the caps are accounted for, they just don’t match their lenses.
The solution is simple, remove some info from each label: instead of writing the brand, focal length and max aperture, just write the lens filter thread, this automatically increases the cap-to-lens-match ratio. Of course, you would lose the ability to identify a lens by the label, but most lenses are different enough to tell them apart anyways.
The same goes for the back caps, Just put a small label to mark the brand: say ‘N’ for Nikon, ‘C’ for Canon and ‘FE’ for Sony FE. You get the idea.
Then you can go ahead and do the same for the body caps.
Of course, if you are shooting video on the lenses there is a good change that all your lenses are stepped up to 77mm anyways to save on filter and mounting adapters, which makes this even easier.
[How to Label Lens Caps | DSLR Video Shooter]