I've been thinking about getting a new Arca Swiss compatible plate to replace my Calumet one for a while now but I can't seem to settle on one I like so would like to hear from others as to what experience they've had with the various makes (Wimberely, Kirk, Benro etc) and how they rate as the best particularly for ease of taking on and off the tripod collar and overall security of fit to the head base plate.
The one thing I know for sure that I want from another plate is that it has the same specific design as my Calumet QR plate in that it has a notch so that the QR plate has two points of contact with the base plate (see picture). I don't know which of the makes fulfil this criteria as it's hard to work out from the smallish pictures on their websites which also tend to view them from above.
Hope everyone understands that lot. Cheers. B

Adam
I know exactly what you mean about trying to work things out from small thumbnails on the net. You can't beat trying out in person, but here lies the problem for most of us, especially now that we are losing more and more camera stores that actually keep stuff in stock.
The difficulty for us though, is that we don't know what clamp you have, so instead I'll relay my own experiences with the arca system.
Having owned a number of different heads/q/r systems over the years, from Manfrotto, Giottos, Slick, Culllman etc, it became apparent that I needed a decent system that would replece all of the above, and the more I read, the more I realized that the Arca system was the answer. This was especially obvious after I started using a DSLR, with various different bodies/lenses. Arca clamps are generally the best in quality, and importantly, they allow you to balance your rig, which is important for camera/lenses as well as digiscoping.
However, as you have learned, not all Arca clamps/plates are the same, even though they follow the same basic standard. The first I tried was from Giottos, but I quickly found that these didn't work for most other Arca pattern plates! They work ok for their own brand of plates which have a different safety stop mechanism to most others, but when I bought 2 Wimberley plates (which use tiny grub screws at each end to stop your gear inadvertently falling out of the clamp should you forget to tighten them up) I discovered that I couldn't slide them in from the end of the clamp, because of these very studs! To make matters worse, the Giottos clamps don't open wide enough to drop the plate in from the top. Useless!
In the end I bit the bullet and bought a Wimberley C-12 clamp, which is simple but brilliant. So far all other Arca type plates I've tried fit into the clamp, which is half the battle! though some have very slightly different dimensions. Even the studs (like the ones that are causing you problems) vary slightly in size/shape, but essentially they all work. Be aware though, that some of the newer flip-lock clamps (that work like a bicycle Q/R) will not work so well because of these slight variations in size. If you opt for one of these, make sure all of your plates are identical.
Sorry if this was a bit long-winded, but it's worth asking yourself if you do need a new plate? or indeed a better clamp! Personally I don't like the way yours is being 'distorted' in the picture. The Wimberley ones don't do that, presumably because their tolerances are closer. I would feel much safer with a better quality clamp/cheaper plate combo than the other way around, as clamps by Wimberley, Kirk, Really Right Stuff etc are tried and tested with much heavier gear than I use. I'm not sure that can also be said of some of the cheaper ones I've seen on Ebay etc.
btw, I've found that these plates are of decent quality, are cheap, and fit fine in the Wimberley clamp
http://www.amazon.co.uk/s/ref=nb_sb...s+plate&rh=i:aps,k:kiwifotos+lens+plate&ajr=0
Wimberley clamps and plates are available from here (watch the video):
http://www.bobrigby.com/wimberley/wimberley_c12clamp.html
Most other decent stuff has to be bought in from abroad as far as I know, though Kirk stuff is available from Warehouse Express. Never tried them though.