I think most people that will be mounting the camera to a tripod will not be using the grip. The grip adds no benefit to the camera when mounted onto a tripod. Just adds weight and bulk.
I currently use a 5d2 and do have a grip for it. When I plan on using the camera on a tripod, I always remove the grip. It serves no purpose in those conditions.
i always have a grip on all my other cameras and it stays there. weight isn't a problem as i have assistants
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the grip and the L-plate also has other reasons- not just for vertical shooting-
- as I'm always alternating from tripod to handheld quickly
- its like a roll cage for the camera so i can plonk it down on concrete, and also saves the day if i actually drop the camera (has happened).
- the camera itself really is far too small for me to hold. its a pain. I need a decent grip as the lenses are so large on it (see attached pic).
- L-bracket can have attachments added to hold the ables in. Especially with this camera with tiny plugs- mini hdmi, tiny usb, they just don't stay in.
- This camera is a bit of an embarrassment to shoot professionally - its just looks like a toy! Clients are often requesting that i use medium format (i have a contax /p65), but due to its limitations i can't use it much, and prefer the 5dmk3 often- but that can be a bit of a hard sell to them. I figure the sony a7r will be a even bigger problem to sell.
But if you don't see the need for one of these L-plates for the grip, thats cool - but please help me and send these guys an email so they think there is enough people needing them to warrant making them! I would really appreciate it.
paul