csebasti
Offline
• • •
Upload & Sell: Off
|
GHarris wrote:
There's some mixed information in this thread.
Eye AF will definitely work on your A7iv. It has worked pretty seamlessly on all bodies since the A9/A7Riii/A7iii (i.e. not gen 2 bodies like the A7Rii that 'cinema' is using, hence the confusion, unless he enables a very specific AF, limited mode - but this restriction is not relevant to you. For you, it will work). Autofocus will work decently but not perfectly - "How fast is the autofocus?" is rather a "how long is a piece of string?" kind of question. It depends a little on the lens. With lenses that focussed fast on a good Canon native body, the autofocus will be satisfyingly fast, by and large, but less fast than native. However, it will be more accurate than native, since you are no longer at risk of needing to calibrate your lens to account for sensor/optical viewfinder alignment mismatches. More than that becomes vague and difficult to define. The area of the frame that can autofocus is less than native - if you want your camera to focus on /track something the far left and right of the frame it won't autofocus well, but for most of the frame autofocus will work. It's a minor but not severe limitation, you might often not care about it.
You will be limited to a maximum of 3 fps burst shooting, if I remember correctly. This limit is considerably higher (10fps) on the a9 and a1. AF-C works well, in my experience, on the a9, so what someone said above about AF-C not working is not strictly true either. Perhaps there is some difference about how the adapter performs on an A7iv but I would expect AF-C to work and work well.
The MC-11 is a Sigma adapter, primarily intended to offer adaptation functionality to Sigma's "Art" lineup of Canon-mount lenses. With these lenses, maximum burst shooting rate is higher (I think), AF-C is explicitly supported (but like I said, it works on other Canon-mount lenses too anyhow) and Eye AF works even on the mark 2 Sony bodies. Just mentioning that for context. Sigma made an adapter aimed at their own lenses, and while it gives those lenses some special treatment, it nevertheless works so well that Canon lenses work well on it too.
The MC-11 is very well built. It is very precisely machined, so it doesn't mis-align anything or get the spacings wrong in a way that will degrade image quality. This is not the case for some adapters. It's a well-built and solid, reliable adapter, so it is probably a good, risk-free option for buying used.
Occasionally for new bodies (or major camera-body firmware updates) the firmware on the MC-11 has to be updated. Perhaps this will be the case for you, since the A7iv is relatively new, especially if you buy the adapter used. If the adapter isn't working right when you first try it, this will be why. There is a USB port hidden under a tab on the side of the MC-11. So you just need the right sort of USB-cable and a computer, to update it.
The MC-11 is a useful tool that adds options to your camera. Like you said, you can buy one at an affordable price used, so there isn't much to lose. Personally, I would suggest you should go ahead and buy it....Show more →
Thanks for all of that detailed info. It's quite helpful. I hadn't realized there was a limitation on fps. I'm not too worried about dropping down to 3 fps max, so no issue there.
I agree with you're thoughts on low risk buying a used one. If I don't like it I can sell it and likely get all or most of my money back. Maybe it's a little hassle needing to sell, but no big deal.
|
