"Needless to say, you could also just let your camera hang from a neck strap while you change lenses. Not everyone likes using those straps, however."
Why? "Needless to say" I've never met anyone else with a disability of using such basic common sense, until I read this article.
Bas Klein Bog
Photographers have a third hand, it´s called a strap. Also if you have lenses at hand you probably have a camera bag as well. Use that to prop the camera while changing lenses if you feel a strap is not for you.
never had a problem changing lenses on a Canon EOS with only 2 hands without the strap. Only need one hand on the body, and one on the lens...
so... what's the point?
Joris van den Heuvel
SpaceBagles: I'm an reasonably experienced photographer, and I hate straps with a passion, for several reasons. A) People can grab it and start running. B) It gets in the way, especially when shooting with a portrait grip. C) Straps can catch onto things, causing more problems than they solve. D) The weight of a gripped SLR body and 70-200 lens causes neck pain. E) The camera dangles when you walk, requiring you to hold it anyway.
I use a Spider holster.
Back on topic: I would never trust the weight of a f/2.8 zoom to a little magnet.
Bob Fately
I think it's a nice idea, but agree with Joris that a magnet powerful enough to hold a 2+ pound lens would be either hard to use or hard to trust. And no doubt those lens caps will cost quite a bit more than the non-magnetic ones.
Iván Imhof
Well, for the usual lenses it's not a big deal to change them with one hand, even the cap I could remove and put it back... Of course, it's a bit risky, if I loose the grip on it, but I have never dropped it.
Christopher Miller
I dont think the magnet supports the lens at all. it holds the cap. you hold the lens to the cap, twist, and pull away. now you have a capped lens with one hand.
James Davis
The billing here isn't quite accurate. The Backer Capper only assists with one step in a lens changing process - attaching and removing the end cap. Well that can make a difference for most of us I'm sure. It could be a super-convenient little device that can easily be added to existing straps (bags, holsters, belts, etc.) and I would probably use it. Now that being said, I am still left to deal with the lens itself. That bit is not addressed with this little device. The introductory video appears however to try and sell you on the fact that this will make your entire lens changing process much more effortless. This really isn't the point of the system. This little device should be introduced as only part of a lens changing process or system. And for that it seems to do ok.
This is ancient history.
Back in early 70s Canon had a very innovative design for their F series cameras. The mounting ring could be turned to release the lens from camera and it would click into open position. The lens simply had to be pressed against the rear cap which released the spring loaded mounting ring on the lens to turn and hold the cap in place.
Charles Slavens
Why not just use a flat head screw to attach a rear lens cap to a camera strap, belt, etc.? Beats the heck out of trusting a little magnet to hold your expensive lens.