gym Loc: Athens, Georgia

A while back, I purchased a Fotodiox Pro Lens collar for my 100mm Canon macro lens. Though it works, it doesn't tighten down enough to prevent slippage and I find myself constantly having to adjust it. I thought about removing the collar and putting some tape inside it so that it would naturally be tighter when it closes, but I'm not sure what to use.

Anyone else have a similar problem with third party collars?

Grahame Loc: Fiji

Rather than tape you could simply use paper or thin card. No gunge.

jdubu Loc: San Jose, CA

Or get some foam sheeting from a craft store for a couple of bucks and make an inner sleeve, single or double wrapped.

JimH123 Loc: Morgan Hill, CA

I used tape, and it has worked well. You can likely find tape the same color as the collar. Mine was black and I used electrical tape.

jdubu Loc: San Jose, CA

Tape will probably do the trick. But, unless it's gaffer's tape, you run a big risk of tape residue left on your lens or collar. Depending on which you apply the tape.

AndyH Loc: Massachusetts and New Hampshire

I would apply gaffer's tape to the inside of the collar, not the lens itself.... If you don't have gaffer's tape easily available, you can get it on Amazon.

Andy

gym Loc: Athens, Georgia

Thanks everyone. I'm going to give gaffer's tape a try. I'll let you know the results.

rook2c4 Loc: Philadelphia, PA USA

A piece of rubber band should work well too.

John N Loc: HP14 3QF Stokenchurch, UK

Yes, I got an EBAY job for around 20% the cost of the CANON product for my 70 - 300 'L' series zoom. It was a little more difficult to fit and the locking thread is not so smooth.

I also have a 400mm 'L' series prime (given to me by my sister) with what I believe to be an original CANON lens mount. It is superior in every way - the lens revolves in it easier, the thread is a smooth action that never loosens etc.

I'd get the EBAY one for next lens - I can't justify the 5x price incremental for the better CANON one - though I'd certainly pay 50% - 2x more.

I would be very wary of fitting tape inside the collar. Think big end shells on a car and sleeve it with newspaper first. If you still have 'old' type newsprint (the kind that turns paper round boys black or does an ace job on windscreens) it'll also lubricate the surfaces. Any kind of tape will inhibit intentional revolutionary movement, by which I mean going from landscape to portrait within the fitting.

If the newspaper works, you can probably replace it with a slighly more robust paper such as the anti-corrosion papers packed with new tools etc.

CO

Tape is probably going to be much too thick. I'm a machinist. At work, we have shim stock. Some is brass, some is steel. The shop has it in different thicknesses from .001 to .02 inch. I would get some .002" brass shim stock. (Even some .001" shim stock may be thick enough). It's not going to take much to take up the space needed to tighten the collar. It's made to precisely fit the lens barrel.

Manglesphoto Loc: 70 miles south of St.Louis

I just read all of the suggestions posted. While many will work for awhile , what happens when the collar stretches and reaches the breaking?
I would just bite the bullet and buy the O.E.M. collar.

Jrhoffman75 Loc: Conway, New Hampshire

When I had that problem I used a piece of thin Teflon sheet. Low friction and no residue.

foathog Loc: Greensboro, NC

Don't you mean "TURD" party? LOL

boberic Loc: Quiet Corner, Connecticut. Ex long Islander

Difference in price for the fotodiox vs Canon lens collars is about $100. If you can't afford 100 bucks to put an OEM attachment on an expensive L glass lens, get another hobby. Third party collars just might scape up the finish on that lens to make it hard to sell if you ever want to sell it.

lamiaceae Loc: San Luis Obispo County, CA