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A1 ISO limits

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crysania View Drop Down
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Post Options Post Options   Quote crysania Quote  Post ReplyReply Direct Link To This Post Topic: A1 ISO limits
    Posted: 16 June 2023 at 17:09
I currently shoot with the a9ii and I'm capped at ISO 25,600 when using electronic shutter.

Does the a1 have that same limitation? I can't seem to find the info anywhere.

And before anyone asks...yes...I need that high of ISO for my work.
 



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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 16 June 2023 at 17:42
You work with Swiss cheese, I assume

Maybe one of the owners of the A1 can chime in, but Ken Rockwell mentions the limitation on his Sony A9 page and mentions nothing on his Sony A1 page.
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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 16 June 2023 at 18:11
Looking further on Ken Rockwell's site, I noticed the A7r4 and A7r5 don't have a limited ISO range with the electronic shutter. But depending on your usecase, rolling shutter might be a problem.
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crysania View Drop Down
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Post Options Post Options   Quote crysania Quote  Post ReplyReply Direct Link To This Post Posted: 16 June 2023 at 18:28
The rolling shutter COULD be a potential issue. The bigger issue is large file size and the limits of the electronic shutter (10fps just doesn't cut it).

I love EVERYTHING about the a9ii but the ISO capabilities. Which is becoming a big deal in what I shoot.
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Dopol View Drop Down
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Post Options Post Options   Quote Dopol Quote  Post ReplyReply Direct Link To This Post Posted: 16 June 2023 at 19:50
I did an extremely short experiment with my A1.

ISO102.400 and shutter speed 1/32.000s
It photographed
But I can say it's a little noisy

And another experiment, the same ISO but a shutter speed of 1/640s
Still a little noisy

But it functions

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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 16 June 2023 at 20:25
Originally posted by crysania crysania wrote:

The rolling shutter COULD be a potential issue. The bigger issue is large file size and the limits of the electronic shutter (10fps just doesn't cut it).

I love EVERYTHING about the a9ii but the ISO capabilities. Which is becoming a big deal in what I shoot.
60mp is not that much more then 50mp, but 20fps is double 10fps.

There is a rumour that there will be a new A9iii within the next couple of months.

@Domien:
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TomV View Drop Down
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Post Options Post Options   Quote TomV Quote  Post ReplyReply Direct Link To This Post Posted: 16 June 2023 at 21:41
I just checked and I have Elec Shutter and am allowed to crank up to 102400.
TomV - a1, Sony 200-600, 100-400, 400 f/2.8, Tamron 17-28, 28-200, 70-180, Rokinon 24 f/1.8
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