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Hi All,

 

I have the Canon rf 35mm 1.8 stm macro which I have put on a uv filter. Earlier today, I accidentally bumped the lens whereby its lens cap (front) was stucked. I eventually got to remove it after doing an online search. The lens itself works fine and there seems to be no issue with its performance. Having said that, I noticed that the lens doesn't seem to retract by about 2 mm or so as it used to when switching the camera off; upon inspection, it seems that the UV filter prevents it from doing so. The UV filter does not appear to be in the 'front element' of the lens. This may be an optical illusion created due to the non-retraction of the lens 'below' by about 2 mm. I took the lens to a local camera store and the gent who assisted me said that it shouldn't really be an issue because macro lens have somewhat different design (not the actual words but this is what he was alluding to). He did say however that the placement of the uv filter on the lens is strange. (Please see photos.)

 

As mentioned, I have not seen anything different with the lens' performance from the limited test shots I did; however, I am weary that there might be something wrong. Also, I am uncertain now how to remove the filter with its current 'positioning'. Any thoughts feedback from the group will be appreciated. Thanks in advance.

 

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The thing screwed on in front of the UV filter looks like the metal ring part of a lens hood with the rubber shade part removed. Perhaps it will just unscrew? But don't use excessive force or the lens might be damaged. If the lens is performing OK you could just leave it on.
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The thing screwed on in front of the UV filter looks like the metal ring part of a lens hood with the rubber shade part removed. Perhaps it will just unscrew? But don't use excessive force or the lens might be damaged. If the lens is performing OK you could just leave it on.

 

Oh yes, how could I be oblivious of the metal of the lens rubber hood?:) First time to use one and have not really paid attention to it. You're right. LOL, was paranoid, many thanks for your post. The lens is working fine.

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  • 2 weeks later...
The problem with filter wrenches is that if excessive force is used to free up a stuck filter, there's a risk of damaging the lens, particularly with modern plastic bodied lenses. I've occasionally done it by carefully cutting partly through the filter ring with a small hacksaw, then either removing or breaking the glass, when the ring can be twisted off with pliers. Sounds brutal ...
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The problem with filter wrenches is that if excessive force is used to free up a stuck filter, there's a risk of damaging the lens, particularly with modern plastic bodied lenses. I've occasionally done it by carefully cutting partly through the filter ring with a small hacksaw, then either removing or breaking the glass, when the ring can be twisted off with pliers. Sounds brutal ...

 

I had to do that with one of the lenses at school.

The filter took a hit and the filter glass shattered. The filter ring was bent just enough to lock it in place.

I had to partially cut the filter ring in 2 places, then use a plier to bend the 2 segments in, to releive the pressure of the filter ring on the lens.

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