Does anyone have any first hand experience with putting an A7RIV or A7RV into the A7SIII housing? Dimensions and layout all look very very close, but obvioulsy these things are a game of mm's.

Asking because like everyone, I would prefer to keep my housing and A7SIII for video and then just chuck in the A7RIV or V for stills.

Cheers,

Dave

1 hour ago, DPT Scuba said:

Does anyone have any first hand experience with putting an A7RIV or A7RV into the A7SIII housing? Dimensions and layout all look very very close, but obvioulsy these things are a game of mm's.

Asking because like everyone, I would prefer to keep my housing and A7SIII for video and then just chuck in the A7RIV or V for stills.

Cheers,

Dave

Hi, Dave,

It appears the Sony a1 (v1) would be a better still camera for the NA-a7sIII housing.

There is a camera plate for the NA-a1 housing that allows the a7sIII to be used inside. Perhaps there is a similar option that allows the a1 to be used inside the NA-a7sIII housing. Worth checking.

Cheers,

Chip

Thanks Chip,

I was hoping not to spend that much more money if I'm honest! There are some good deals on the A7RIV and V at the moment so I was hoping to take advantage of one of those deals.

I'll see if I can get my hands on one and actually put it in the housing and see.

Edited October 15Oct 15 by DPT Scuba

On 10/15/2025 at 10:47 PM, DPT Scuba said:

Thanks Chip,

I was hoping not to spend that much more money if I'm honest! There are some good deals on the A7RIV and V at the moment so I was hoping to take advantage of one of those deals.

I'll see if I can get my hands on one and actually put it in the housing and see.

this site allows side by side comparisons so you can compare models:

https://cameradecision.com/compare/Sony-Alpha-A7S-III-vs-Sony-Alpha-A7R-V

They have to be very close not only in layout but items like body depth from front to back so the buttons can engage with housing controls and dial grips will work. There have been posts where people have modified the camera plates to allow similar models to work.

If you take the pice from camera comparison you can cut and paste one on top of the other to get something like this:

You can see the controls are out a little while the Sony A1 vs A7SIII are a perfect match apart from the top panel dials to left of the viewfinder on the A1:

The camera plate change is needed to deal with the change in camera depth front to back with these models.

Hi @DPT Scuba

As a reference, I tried installing a7rV in my a1 housing. (Basically same as your sIII housing) It is not a good fit and most of the control buttons do not line up. It’s not a practical option for normal usage.

Picking up a pre-owned a1 (v1) and the appropriate new camera mount plate would be the least expensive option as compared to buying a completely separate housing.

I also owned an a7rIV. The a1 or a7rV are substantial improvements in just about all areas over the a7rIV.

Good luck!

Chip

Edited October 19Oct 19 by ChipBPhoto

Thanks for the assistance here guys, it is most appreciated.
I didn't realise how close the A1 and S3 were. However I'm thinking that the s3 fits in the A1 housing as it doesn't have the dial on the top left, but I'm not sure if there is space in my S3 housing for the extra dials on the A1. I'll see if I can find someone local with an A1.