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A1 firmware 4.00

  
 
ronno
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p.2 #1A1 firmware 4.00
Does anyone know if it's possible to have the camera not write the XML files when shooting video? I have no use for them.
Dec 10, 2025 at 01:32 PM
RT--
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p.2 #2A1 firmware 4.00

deevee wrote:
since I may have to reprogram everything

Most settings remain unchanged, unless you're coming from an ancient version.
The only things I've had to adjust so far have been:
- "limit focus areas", because the new focus areas enable 10 new options
- enable deleting from both cards without extra steps
Dec 10, 2025 at 01:47 PM
RichP42
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p.2 #3A1 firmware 4.00
This firmware update is even more surprising than the one for the A7RV, given Sony's past record. This bodes well for the future! As with the A7RV update, I appreciate that the LCD display rotates from landscape to portrait format as you turn the camera. I also expect to use the XS spot and customizable focus areas a lot.

I wish, however, that Sony would add Full Time DMF to the A1. I find it hard to believe it's a hardware issue. I can understand them not including pre-capture, but that would also be nice!

Richard
Ottawa

Dec 10, 2025 at 06:50 PM
LiveShots
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p.2 #4A1 firmware 4.00
I'm excited to try the customizable focus areas.
Dec 10, 2025 at 08:01 PM
StoneCrop
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p.2 #5A1 firmware 4.00
Doesn’t it Have DMF on the left dial (the bottom one with all the focus types, below the shooting mode dial)?

RichP42 wrote:
This firmware update is even more surprising than the one for the A7RV, given Sony's past record. This bodes well for the future! As with the A7RV update, I appreciate that the LCD display rotates from landscape to portrait format as you turn the camera. I also expect to use the XS spot and customizable focus areas a lot.

I wish, however, that Sony would add Full Time DMF to the A1. I find it hard to believe it's a hardware issue. I can understand them not including pre-capture, but that would also be nice!

Richard
Ottawa


Dec 11, 2025 at 01:56 AM
RichP42
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p.2 #6A1 firmware 4.00
Yes, but DMF is not the same as "Full Time DMF". DMF is restricted to AF-S, whereas FT-DMF works in AF-S and more importantly, AF-C. It's a relatively recent addition to newer Sony cameras. e.g., the mark 2 alpha1 has it but the older mark 1 alpha1 does not. The terminology is definitely confusing.

Richard
Dec 11, 2025 at 08:36 AM
benjimouse
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p.2 #7A1 firmware 4.00
Has anyone else had the problem of 5 minute lockups after inserting a fresh battery with 3.x firmware? It's the biggest thing I hoping to have fixed in this update.



Dec 11, 2025 at 01:15 PM
ronno
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p.2 #8A1 firmware 4.00
4.0 is working well so far - camera start-up is faster than it’s ever been.

benjimouse wrote:
Has anyone else had the problem of 5 minute lockups after inserting a fresh battery with 3.x firmware? It's the biggest thing I hoping to have fixed in this update.


Dec 11, 2025 at 01:22 PM
MKRhodes
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p.2 #9A1 firmware 4.00
Whoa, no kidding, startup is now virtually instantaneous. Nice.
Dec 11, 2025 at 04:24 PM
Choderboy
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p.2 #10A1 firmware 4.00
Faster startup has been reported after previous firmware updates.
Also reported was that it does not last.

Dec 11, 2025 at 08:17 PM
 


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deevee
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p.2 #11A1 firmware 4.00
Is my A1 bricked?
I have the firmware running for more than 1 hour and the LED light is still flashing red?
I'm not seeing anything on the LCD yet
What to do next?
Dec 11, 2025 at 09:30 PM
MarcPec
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p.2 #12A1 firmware 4.00
Updated through the mobile app this morning, copied over in a minute or two, install once on the camera took around 2-3mins.

Not sure if it's placebo but the menus/buttons/start up subjectivity feel quicker.

I haven't had the time to test it out yet.
Dec 11, 2025 at 09:42 PM
ronno
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p.2 #13A1 firmware 4.00
So what happened?

deevee wrote:
Is my A1 bricked?
I have the firmware running for more than 1 hour and the LED light is still flashing red?
I'm not seeing anything on the LCD yet
What to do next?
Dec 11, 2025 at 11:32 PM
LiveShots
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p.2 #14A1 firmware 4.00
deevee wrote:
Is my A1 bricked?
I have the firmware running for more than 1 hour and the LED light is still flashing red?
I'm not seeing anything on the LCD yet
What to do next?

From the website:

If the access lamp repeats 5 long blinks (0.5-second cycle) and 6 short blinks (0.25-second cycle), or 7 long blinks (0.5-second cycle) and 7 short blinks (0.25-second cycle), it is possible you have not updated from Ver. 2.00 or later, or the system software may have been incorrectly copied to the memory card.

In this case, remove the battery and memory card from the camera, prepare another memory card, and then start over from the Saving the System Software Data to a Memory Card section of this article.

Dec 11, 2025 at 11:35 PM
deevee
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p.2 #15A1 firmware 4.00
Thanks, it turned out the first time I copied the firmware onto the card from my Mac , that copy was bad; tried twice but same result (an hour long LED blinking)
Luckily , the A1 came back alive with 3.0, but had to remove the battery
So I downloaded the firmware again via Creator's App and transferred to the A1 via Bluetooth
The 2nd copy successfully updated
Ah, this is 1 reason , I'm leery to upgrade unless the changes are significant
Case closed (but good lesson for anyone else who have not upgraded)
Dec 12, 2025 at 06:20 AM
arbitrage
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p.2 #16A1 firmware 4.00
Faster startup is seen after every FW update and every time it degrades over time. I don't know what is up with that.
Dec 12, 2025 at 06:24 AM
ronno
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p.2 #17A1 firmware 4.00
Does it actually degrade or do people just get used to the speed?

arbitrage wrote:
Faster startup is seen after every FW update and every time it degrades over time. I don't know what is up with that.

Dec 12, 2025 at 06:53 AM
Jonas B
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p.2 #18A1 firmware 4.00
arbitrage wrote:
Faster startup is seen after every FW update and every time it degrades over time. I don't know what is up with that.


ronno wrote:
Does it actually degrade or do people just get used to the speed?

Or, is there really any change at all? How slow didn't the camera start when released if every FW update made it speedier?

I have never seen anything on the topic except for "feeling" or "I think but I didn't time it". Maybe it is faster, maybe it's faster in some situations (as when having been turned off for days or for just an hour).

My A1 feels about the same as last week. Maybe a little faster. Lol.
Dec 12, 2025 at 08:16 AM
LBJ2
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p.2 #19A1 firmware 4.00
ronno wrote:
Does it actually degrade or do people just get used to the speed?

arbitrage wroteFaster startup is seen after every FW update and every time it degrades over time. I don't know what is up with that.

When the A1 was first introduced it did have a slow-ish startup time. However, Sony addressed that pretty quickly in one of their very early firmware updates some years back resulting in near instantaneous startup at that time. I've never noticed any sort of startup time degradation on my A1 since, even after all the other firmware updates that came afterwards. But I am just a test case of one 😎
Dec 12, 2025 at 08:33 AM
arbitrage
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p.2 #20A1 firmware 4.00
I've noticed that Sony startup times all the way back to my first Sony A9 vary based on some factor I've never been able to figure out.
I have noticed that if your eye is triggering the EVF sensor it starts faster. But other times it will start faster or slower when camera is just turned on and not up to your eye. I don't know if it is based on how long it has been shut off for or what??
I have always noticed very fast startup (without camera up to your eye) immediately after a new FW update. This has been on all my Sony cameras. After a short while it goes back to the unexplained variability...sometimes very fast, other times noticeably delayed.
Dec 12, 2025 at 09:01 AM


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