How do I get a stuck screw filter off of my lens?
There is a UV-filter screwed on my Canon 16-35mm. For some reason, I'm not able to get it off the lens. Does anyone has a simple but safe trick?
You can try this guys: http://vimeo.com/24834472 ;) but you need to go to Montenegro - Friend of mine dropped lens with UV filter on it... filter went to hell - lens survived :)
Use graphite from a pencil to lube the filter if you want to reuse it and fear getting it stuck again.
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Use a hacksaw and hammer. No seriously, look here. http://fstoppers.com/canons-terrifying-recommended-way-remove-stuck-filter
Buy one of these in the appropriate size https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F19084910325
I carry a jar lid gripper around in my kit which has always done the trick for me when I need a little extra, well, grip.
The other 'trick' that I have learned over the years is that most people's default reaction to a stuck filter is to get a really good grip on the filter and just try to torque it off. The problem with this approach is that the filter glass is rarely a snug fit inside the metal filter rim. Because of this, gripping the filter firmly often results in the metal filter rim flexing ever-so slightly... Which binds it to the lens even more tightly. With such tiny threads a flexed filter might as well have lock-tite in there!
So it seems paradoxical, but often I've found that by loosening my grip and very gently turning the filter mostly using pressure on the top of the filter, rather than on the sides (which can cause it to flex) I can get it to turn.
If you're out and about and this happens then carry a couple of elastic bands! These allow you to get a proper grip on the slim sides of the filter so you can remove it. Often they are stuck not because they are jammed on but because you cannot get enough of a grip to apply enough pressure to start turning them.
A very simply, cheap, and more importantly small, solution that works quite well :)
I use an elastic band too. Also make sure you apply pressure evenly around the rim of the filter and not just on two sides else the filter distorts and jams. If future remember that you don't need a filter to screw on tight. I always leave them just a little loose on the thread.
Hours after posting this answer I found the following jar opener free on a magazine ... http://www.trudeaucorp.com/us/products/kitchen-tools-gadgets/p--0999025.html ... small enough to easily carry and should provide even pressure around the filter.
You can buy lens filter wrenches -- if you don't think they'd be something you'd use all the time (and thus, buy), you might find that your local camera shop has one you could use.
When separating a stuck filters that are correctly screwed together the key is to be gentle and persistent. The filters got stuck because of the repetitive motion of turning the polarizer, they will get unstuck the same way.
What happens is that when you use force you bend the ring so the filters jam together more.
To get more grip, take a pair of thick rubber bands and put one arround each filter, that will help grip the very thin part of the polarizer that has the knurling. Gently twist the filters, grabbing at different parts of the ring to even out the distortion. A little push in and out (not rotation) can help wear down / dislodge any grit.
Illustration of undesired action:
Many times my polarizer gets stuck on my lenses for PRECISELY the reason you give. The filter isn't stuck in reality, it's just hard to remove because the force of gripping the filter causes it to tighten. I've found that using the lightest of light touches allows the filter to be removed with ease. As soon as the gorilla grip comes out, the filter acts like its welded to the lens.
You can get filter wrenches for exactly this sort of situation - just as you can for stuck tops on jam jars.
They can come in incredibly useful if you have a stubborn stuck filter. They are usually quite cheap and come in a range of sizes to suit the filter thread size you need...
Try putting the lens in the freezer for a few minutes (or more). The filter probably expanded due to heat and should contract more than the lens as it cools down. Then wait that your lens is above freezing temperature before using it.
Wait not until it is above freezing temp, but until it is at room temp and any condensation has evaporated.
One thing that has always worked for me in the field is to screw another filter on top of the stuck one. Screw it in pretty hard. This provides an extension of the outer surface of the stuck filter, enabling a much better grip with the fingers (or with a tool, which I have never had to use). Perhaps it also evens out small eccentricities in the stuck filter, helping it turn better within the lens's threads. The two filters together are also a much stronger assembly than a single filter, so there is less risk of cracking or deforming it. Once this pair of filters comes off the lens, it can be a little troublesome to separate the two filters again, but they tend not to be stuck as hard as the original filter was. A little patience always gets them apart. If not, you can work with it in the shop if you like without risking your lens; and your lens is back in service in the meantime.