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Gary Friedman on LA-EAx convertors update

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stiuskr View Drop Down
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Post Options Post Options   Quote stiuskr Quote  Post ReplyReply Direct Link To This Post Topic: Gary Friedman on LA-EAx convertors update
    Posted: 29 August 2019 at 19:15
Originally posted by Gary Friedman Gary Friedman wrote:

This is a continuation of Gary Friedman's video explaining the nuanced behavior of the LA-EAx adapters for Sony's E-mount cameras. (The original video appears here: https://www.youtube.com/watch?v=mXsV3... )

This video explores "Yes, but how do the odd-numbered adapters (LA-EA1 and LA-EA3) behave when you're shooting video?" The answer is "it depends on your camera body - it will either focusing using really bad CD-AF or not at all."

On the plus side, when taking stills, all the great features such as subject tracking and Eye AF work just as well as if a native E-mount lens were used.

This video references an earlier video showing just how difficult it is for a camera to focus with the f/stop closed down (a theoretical problem that Sony has since overcome). The video is still worth watching just so you can understand how hard the problem was: https://youtu.be/QlBWL_UVUS8


https://www.youtube.com/watch?time_continue=1&v=5FvusonVmmM
Rob Suits Jr.
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QuietOC View Drop Down
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 29 August 2019 at 19:51
Sony also removed the "AF System" "Contrast-Detect" option on the A9 and A6400. The disappearance of the shutter activated AF-S with the LA-EA3 while video recording could be related to that. The lack of video AF is consistent with AF-C only being supported at lower frame rates.

If the A9 can only focus the latest A-mount lenses at 10 FPS in stills mode, why expect it to focus them at 24+ FPS in video mode?
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