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DPChallenge Forums >> Hardware and Software >> Would my lens cap snap onto the UV filter?
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Showing posts 1 - 8 of 8, (reverse)
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 10/09/2008 09:24:15 PM · #1
It may be a silly question, so bear with me please.

I have a 28-105mm Canon lens, for which I am contemplating to get a cheap Canon UV haze filter for outdoor use.

I am now confused as to whether my existing lens cap will snap on to this filter? Or will I need a different cap that would fit onto the filter ring?

Thanks in advance!!!

Message edited by author 2008-10-09 21:24:51.
 10/09/2008 09:33:53 PM · #2
My general experience is that the lens caps do fit into most filters just fine (no experience with Canon, specifically, though). Unless you get a "low profile" filter with a really thin ring. I also think most folks get such a filter as a matter of course for each lens, as they are cheaply replaced if scratched, so are a cheap bit of protection for the lens element. In fact, I am not sure that they really serve any other purpose than protection in the digital world. In the film world, the emulsion chemistry was very sensitive to uv, so they made a visual difference. I just dont know if the digital sensors are likewise as sensitive.

I think only once in 30 years or so did I end up with a filter/cap combo that would not quite hold tightly.

10/09/2008 09:37:02 PM · #3
Since most filters are threaded inside (typically) for stacking they resemble the inside threads of the lense, so yes it should fit with no problem. The only change to that would be possibly on a thin filter with the threads not being deep enough for the lense cap to grab the threads.
 10/09/2008 09:56:24 PM · #4
Good question.

It makes me wonder how many folks actually ever have a scratched lens.

I put the cap on after every use... so I never buy a filter.

And I've never had a scratched lens... dust? Yep. Lots of it. *sigh*

Is there a real benefit to a filter?
 10/09/2008 10:06:10 PM · #5
Originally posted by Prash:
I am now confused as to whether my existing lens cap will snap on to this filter?

Most likely, but note that you will be adding another layer of average glass to an already average lens.
 10/09/2008 10:09:19 PM · #6
Originally posted by LydiaToo:
Is there a real benefit to a filter?

I've had objects strike the filter and leave a mark that would have otherwise been on the lens itself and I've also dropped a lens that shattered the filter, but left the lens unscathed, so it does offer some protection. A good filter (especially circular polarizers) can improve image quality, too.
 10/09/2008 11:10:25 PM · #7
I've got filters on most of my lenses. On my last trip to Cape Cod I lost my lens cap for my 28-135mm because it did not fit properly with the UV filter on the lens. I guess I'd rather buy a cap than a whole lens in the event of a scratch.
 10/09/2008 11:29:41 PM · #8
Thank you all for the advice, really appreciated.

I am actually not too sure how much good I will be doing by getting a cheap $15 filter.. I am just concerned that the lens's front element will wear out its coating if I keep rubbing it with a microfiber cloth.. call me paranoid;-)

I actually do not think a cheap filter will provide a benefit that will outweigh the deterioration it will cause to the image quality... but I just want to try once.

Thanks again!

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