InFocus2014 wrote:
A question about the Function Ring on the GM 300mm f2.8:
I just received my GM 300mm and cannot figure-out how to program the Function Ring; or for that matter, what it even does.
The Sony instructions are not helpful. I have performed Google searches on the subject and the only thing I can find is that it only works with the A9III(??).
I sold my A1, and having pre-ordered the A1 II on Nov 28, it appears that I might be waiting until mid-March before receiving it. In the mean time, I just have the A7RV to utilize.
Can anyone shed any light on the Function Ring?
Thank you!
Jeff
PS: This lens is amazing! I wonder if I will ever use my 200-600, again.
It is very limited on the A7RV (same as A1 on pre-2.0 FW).
Either FF/APS-C switching or Power Zoom in video.
On the newer cameras it can also be used for Preset Focus 6 set and recall. But I don't think the A7RV ever got this update via FW. The A1 got it in 2.0 FW. The A9III and A1II will have it.
With that function you turn and hold the dial for a few seconds to register and then do a quick turn and release to recall.
With a lens like 400GM or 600GM that have a dedicated focus present button on the lens then I think the ring can recall that focus preset even on the older cameras like A7RV. But the 300GM doesn't have that dedicated button on the lens.
Jan 23, 2025 at 09:39 AM
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