I've wondered about this from time to time, and now I have a situation where I need to know whether the difference in tensile strength matters.
I'm setting up a Pocket 4K with an Easrig Minimax. I plan to use an Easyrig Quick Release, which comes with both 1/4" and 3/8" studs. The first photo shows a Minimax + Quick Release in use. The second photo, borrowed from a post by Mark Wyatt, shows a Quick Release stud on a top handle.
Easyrig has designed its Quick Release for use with all Easyrig models, one of which supports a maximum load of 32kg (70lbs). The Minimax supports up to 7kg (15.5lbs). I expect my camera, lens and accessories to weigh no more than 4.5kg (10lbs).
My question is whether it makes any practical difference whether I use a 1/4" stud and socket or a 3/8" stud and socket. I should note that I plan to try the Quick Release mounted directly to a socket on my 8Sinn camera cage as well as on a top handle. I'm satisfied that the cage and top handle sockets, and my top handle mount, are themselves strong enough. If I can use a 1/4" socket, I have more options for attaching the Minimax.
A quick search, by no means exhaustive, on the difference in tensile strength between these two sizes of fastener suggests that it doesn't matter whether I use 1/4"-20 or 3/8"-16.
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- Easyrig Photo.jpg (247.83 KiB) Viewed 3095 times
- Mark Wyatt Photo.jpg (259.46 KiB) Viewed 3095 times