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Are lens caps compatible between Nikon/Canon?

Photography Asked on November 2, 2021

I need a 52 mm lens cap for Nikon 35mm lens. When I checked the store for 52 mm diameter lens caps, the Nikon lens cap costs twice as much as the Canon lens cap, but they look roughly the same. They both fit in the filter thread.

Is there any reason I should buy the Nikon one, or is it OK to go with the cheap Canon one?

3 Answers

Usually fitting the filter thread is all that is required. One special exception I know about are the Sony DSC-H1/DSC-H2/DSC-H5: here the lens cap fits on the camera which has something like 55.8mm lens barrel threads. You could not mount filters there since they would interfere with the lens extending but you can screw in an extension adapter tube that has 58mm threads at its front. The lens cap also fits on the end of that tube in case you want to have it permanently mounted. When the cap is on the naked camera, it has a deep rim that will actuate a switch that causes the camera to flash a "lens cap attached" message when switching the camera on without removing lens cap.

You can use a generic 58mm lens cap on the adapter tube, and you can use a generic 55mm lens cap on the camera (and on the adapter tube if you keep an 58mm–55mm step-down ring in it by default), but in case of the 55mm cap on the bare camera, switching the camera on will push the lens against the cap, resulting either in a grating noise and the camera giving up eventually, or the cap popping out.

That's the exception I encountered: here the "native" cap is considerably more useful than a generic cap. But most cameras should be fine with a generic cap of the right filter thread size.

Answered by user92986 on November 2, 2021

For the vast majority of lenses, i.e. almost all lenses, a general lens cap would fit, as long as long as it had the right diameter.

There are a few exceptions, e.g. ultra wide angle lenses that have a protruding front element, as e.g. in this question where you need a special lens cap compatible with the lens, but those are really special cases.

Answered by Pete on November 2, 2021

If the lens caps weren't compatible, filters also wouldn't be compatible.

So yes, the thread specs are the same between lens manufacturers. Only the diameter of the filter mount / lens cap varies.

Answered by Warren Young on November 2, 2021

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