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The ProMaster Write On Rear Lens Cap is a great way to keep track of your lenses and quickly identify them in fast paced shooting situations when the light is changing. Or they can be used to keep notes about a specific lens and how you want to filter it, shoot it, etc... A grease pencil is included for your convenience. Or use a dry erase marker or wet erase marker. Write On lens caps work over and over again..
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