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SmallRig Camera Cage for Sony a7S III

BH #SM2999 • MFR #2999
SmallRig Camera Cage for Sony a7S III
Key Features
  • Formfitting Camera Cage for Sony a7S III
  • Maintains Access to Camera's Hot Shoe
  • 1/4"-20 & 3/8"-16 Accessory Threads
  • ARRI-Style Accessory Threads, NATO Rail
The lightweight Camera Cage from SmallRig provides accessory mounting and protection for your a7S III mirrorless camera. The camera mounts onto this formfitting aluminum cage with an integrated 1/4"-20 screw, and it incorporates an anti-twist design with padding on the base to protect the camera from scratching. It maintains access to the camera's controls and hot shoe, and it features a variety of mounting options.
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SmallRig 2999 Overview

The lightweight Camera Cage from SmallRig provides accessory mounting and protection for your a7S III mirrorless camera. The camera mounts onto this formfitting aluminum cage with an integrated 1/4"-20 screw, and it incorporates an anti-twist design with padding on the base to protect the camera from scratching. It maintains access to the camera's controls and hot shoe, and it features a variety of mounting options.

In addition to one integrated shoe mount and multiple 1/4"-20 and 3/8"-16 accessory threads, the cage features ARRI-style accessory threads for preventing accessories from twisting when mounted on the cage. The cage also features a NATO rail on the side and mounting threads on the front for a separately available lens adapter. An Allen wrench stores on the bottom via a magnet for tightening the camera screw.

Compatibility
Sony a7S III mirrorless camera

SmallRig 2999 Specs

Support TypeCage
Grip TypeNone
Camera CompatibilitySony a7S III
Mounting
Accessory MountingMultiple x 1/4"-20 Thread, Multiple x 3/8"-16 Thread, Multiple x ARRI Anti-Twist 3/8"-16 Thread
Camera Mounting1/4"-20 Screw
Tripod MountingCage: 1/4"-20 Thread, 3/8"-16 Thread
Shoe MountingCage, Top: 1 x Cold Shoe
RosettesNone
Rail MountingCage, Side: 1 x NATO Rail
General
MaterialsAluminum
Dimensions4.19 x 5.73 x 2.52" / 106.5 x 145.5 x 64 mm
Weight7.76 oz / 220 g
Packaging Info
Package Weight0.7 lb
Box Dimensions (LxWxH)6.6 x 6.2 x 3.4"

SmallRig 2999 Reviews

Very versatile

By Benjamin
Rated 5 out of 5
Date: 2021-05-26

Works great for the Sony a7siii. Very versatile when attaching mics, lights, and monitors.

Great fit

By Hamid
Rated 5 out of 5
Date: 2021-02-23

Nice fit for Sony 7SIII. It is well designed so all functions and needed slots are well accessible and with enough holes to mount anything on the camera.

Does the job and seems to have what I need.

By Greg
Rated 5 out of 5
Date: 2021-02-22

A good cage, no issues at all. Decent price too.

Fits perfectly with the Sony A7sIII

By Peter
Rated 5 out of 5
Date: 2021-01-20

I’ve always been using Small Rig products for my camera cages and this one does not disappoint. Fits perfectly with the new Sony a7siii. Definitely an essential accessory!

My first cage!

By Kranky Plate
Rated 5 out of 5
Date: 2021-01-19

Now I can mount all the things to this thing and things are good! Really good fit, solid construction, makes my A7Siii not feel so toy-like.

great basic cage

By Michael
Rated 5 out of 5
Date: 2021-01-11

great low profile cage. Comfortable to handhold. Has plenty of slots customization. I'm a big fan of smallrig's line of rigging gear. Really sturdy stuff but so much more affordable than the other brands.

Works on A7III too

By Matthew
Rated 5 out of 5
Date: 2021-03-19

I bought the wrong cage by accident and didn't realize it until about a week after I had it but that's a good thing as it means it works with other cameras. It's lightweight and has plenty of places to thread attachments onto it and overall I'm happy with it. Now I just need an A7SIII to put inside it.

Strong with great support for

By Gregory
Rated 5 out of 5
Date: 2021-02-24

Strong metal with great support for my Sony s3.

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Is there a Metabones lens adapter support ...

Is there a Metabones lens adapter support available for this cage? I have the Metabones PL to E Cine Adapter and this cage.
Asked by: Adam
There is not a lens adapter support available for the SmallRig A7S III Cage.
Answered by: Peterm
Date published: 2022-09-15

Will it fit my A7R4 as well?

Will it fit my A7R4 as well?
Asked by: Elton
Yes, the two are essentially the same size.
Answered by: Bruno
Date published: 2020-09-21

After assembled this cage with A7S iii, how to ...

After assembled this cage with A7S iii, how to mount it on RRS Lever Release Clamp horizontally and vertically? Which RRS plate or part I should purchased? I would like to make the final assembly 100% compatible with RRS LR clamp.
Asked by: TSE JEN
You can use a Really Right Stuff BP-CS Multi-Camera Conventional Plate, BH # REBPCSPLATE which can still leave you access to the battery door and would mount horizontally to an RRS Lever Release Clamp. http://bhpho.to/33pXg7o
Answered by: Kirk
Date published: 2021-01-23

Does this cage allow the VG-C4EM vertical battery ...

Does this cage allow the VG-C4EM vertical battery grip to be connected?
Asked by: George
Unfortunately no, the cage will interfere with the battery grip.
Answered by: Nicholas
Date published: 2021-03-17

What 15mm rod support bracket will mount using ...

What 15mm rod support bracket will mount using the two small holes on the bottom front of the cage that are spaced 27mm apart? The smallrig 942 bracket is too wide for this cage. Is there a bracket that fits, or are these mounting holes for something else?
Asked by: Miles
Usually those screws in the front are used for lens support.
Answered by: Nicholas
Date published: 2022-08-09

Which smallrig arca swiss plate fits this?

Which smallrig arca swiss plate fits this?
Asked by: Ryan
Practically any Arca Swiss Plate fits underneath this cage. This camera cage does not come with an Arca-Swiss Style Bottom Plate.
Answered by: Nicholas
Date published: 2021-01-18

does it fit with the new sony a7 iv?

does it fit with the new sony a7 iv?
Asked by: Rosandy
No. This SmallRig Camera Cage for Sony a7S III, would be compatible with the Sony A7s III.
Answered by: Moe
Date published: 2022-06-27

Will this also fit A7III/A7RIII? - It looks like ...

Will this also fit A7III/A7RIII? - It looks like there is clearance on all the doors and the face isn't significantly changed model to model.
Asked by: Jeremiah
This is designed specifically for the A7SIII. It may work with past models, but we do not recommend it. For the A7III/A7RIII you would want to look at BH #SMCCS2645 instead.
Answered by: Joseph
Date published: 2020-11-05
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