I have the Op/Tech straps on a lot of my gear. In fact I have the short connecting straps on most gear, and a couple of the padded shoulder strap bits which I swap around.
There are two important types of the connecting straps (which Op/Tech refers to as "System Connectors"):
- 3/8" strap
This is a standard nylon webbing type. - Pro loop
This has the thinner flexible loop attachment.
There are some other types of connector, but these are the ones I recommend.
I have the 3/8" connectors on my CP-E3 flash power pack, and on the left side of my camera bodies. I have the Pro Loop connectors on the right side of my cameras (they don't get in the way of the shutter when I'm flipping the camera).
You can connect these System Connectors together to form a hand strap, or attach your choice of shoulder pad. Some examples:
- Classic (I have a couple of these)
- Super Classic (I have one of these) which has rubber studs for better grip
- Pro (which I think was the one branded as D70Users)
- Super Pro
Some people (including some copywriters at B&H!) have got confused with the "Pro" name for the shoulder strap and the "Pro Loop" name for the connectors because you can buy them packaged as the "Pro Loop shoulder strap". But you can get components individually, and swap them around as required.
Highly recommended as a system! I just wish they gripped your shoulder as well as the
UpStrap.