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LA-EAx shutter lag when stopped down

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ab012 View Drop Down
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Post Options Post Options   Quote ab012 Quote  Post ReplyReply Direct Link To This Post Topic: LA-EAx shutter lag when stopped down
    Posted: 27 November 2019 at 05:26
Hi everyone

I have been looking at using the LAEA3 adaptor as a bridge between my a mount (a99+tons of lenses) and e mount (recently got a 6500 and a few primes) - including potentially a9 or a7rx down the track. I already purchased the LAEA3 (and actually the LAEA1 a long time ago...)

However one thing that is driving me crazy is the shutter-lag when stopped down with the LAEA adaptors. In summary - wide open, everything is great, but when stopped down there is a noticeable shutter lag even when only 1 stop down, and the lag increases as it is stopped further down...

Google shows a few rare postings about this, but surprisingly few. It seems that it is due to the slow speed of aperture closing ;(

Anyhow - I thought to ask here what the current situation with this lag is - and in particular, is this issue merely due tot he a6xxx series (and hopefully resolved for the a7r3/4 and a9?)

Advice welcome!
Bernard

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Snegren View Drop Down
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Post Options Post Options   Quote Snegren Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2019 at 08:03
I use the LA-EA3 on A7 and A7Rii with same result. Lag is the property of the adapter. When using native FE lenses on A7x cameras the lens will be electronically stopped down to the adjusted f-value when the camera is switched on, so the aperture does not move when the shutter is pressed and aperture lag is completely removed from the response time.

Edited by Snegren - 27 November 2019 at 08:10
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rovhazman View Drop Down
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Post Options Post Options   Quote rovhazman Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2019 at 10:01
Same issue here with the a7RII. Very annoying! You may add to that the fact that both LA-EA3 and LA-EA4 do not support A-mount tele-converters (you cannot even adjust the aperture!).
It seems that Sony tries to force E-mount users to buy the new native lenses in stead of using the old A-mount lenses, but still get positive PR for providing the adapter (they use always publish that you can use A-mount lenses on your E-mount body). I don't see any technical reason for that, but maybe I am wrong.
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Snegren View Drop Down
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Post Options Post Options   Quote Snegren Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2019 at 11:41
Sony could do many things to improve the performance of the A->E adapters. Provide a motor for screw drive lenses, make use the the on-sensor phase detecting AF sensors, stop down the A-mount lens as the A7x cameras do on native lenses. The screwdriver is a complete re-design, that may be asking too much, but the rest would be just firmware upgrade.
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 27 November 2019 at 11:45
I've heard Sony has changed the aperture behavior with native lenses on the latest bodies and introduced some aperture lag--more than people are used to the SLRs. The DPReview editor(s) made some comments about how this behavior was something they requested, but they were also surprised.by the amount of lag. I can't find the discussion right now.

The LA-EA aperture mechanism(s) are not as good as those on A-mount bodies. They open fully whenever stopping down any additional amount while video recording.

I've wondered if the larger battery improves the LA-EA performance. I made the mistake the other day of going out with 50% battery while using the LA-EA4 for the 500mn Reflex and was only able to take about 5 pictures. The adapters might be current limited.

Edited by QuietOC - 27 November 2019 at 11:50
Sony A7II A6000 A77II LA-EA3 LA-EA4 MC-11 MD-NEX KR-NEX DA-NEX
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8 8.5/1.9
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