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Really Right Stuff Base Plate for Sony a1, a9 II, a7R IV, and a7S III

BH #REBA1B • MFR #BA1-B
Really Right Stuff Base Plate for Sony a1, a9 II, a7R IV, and a7S III
Key Features
  • Adds Quick Release Functionality
  • Arca-Type Compatible Dovetail Mount
  • Black Anodized 6061-T6 Aluminum
  • With QD Quick Disconnect Socket
The Base Plate for Sony a1, a9 II, a7R IV, and a7S III from Really Right Stuff is designed to add Arca-type quick release functionality to the camera body. The plate features anti-twist flanges to keep the camera securely in place and prevent it from rotating on the plate.
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Really Right Stuff BA1-B Overview

The Base Plate for Sony a1, a9 II, a7R IV, and a7S III from Really Right Stuff is designed to add Arca-type quick release functionality to the camera body. The plate features anti-twist flanges to keep the camera securely in place and prevent it from rotating on the plate.

The CNC machined 6061-T6 aluminum plate maintains complete access to the battery door without obstructing the LCD monitor's movement.

This CNC-machined aluminum plate has a Type II black anodized finish, which makes it resistant to scuffs and scratches. It has a laser engraved center mark on the back for precision alignment on a head. The base features a QD Quick Disconnect system socket and an integrated hand strap loop and a storage space for the included hex wrench.

Compatible Sony Cameras
  • a1
  • a9 II
  • a7R IV
  • a7S III
UPC: 818413020436

Really Right Stuff BA1-BSpecs

Mounting
1x 1/4"-20 Male
1x 1/4"-20 Female
Strap Loop
Yes
Quick Release Plate Type
Arca-Type
Quick Disconnect System
QD
Bubble Level
No
Materials
Aluminum
Dimensions
5.1 x 2.7 x 0.7" / 129 x 68 x 19 mm
Weight
3 oz / 84 g
Packaging Info
Package Weight
0.4 lb
Box Dimensions (LxWxH)
5.15 x 3.7 x 0.75"

Really Right Stuff BA1-B Reviews

See any errors on this page? Let us know

does this fit the a7 r iv a?

does this fit the a7 r iv a?
Asked by: Maureen
Yes, this will fit the A7R IVa as there is no physical difference between that camera and the A7R IV.
Answered by: Kevin
Date published: 2023-10-09

Does it fit the a7 IV?

Does it fit the a7 IV?
Asked by: Paul
The Really Right Stuff Base Plate for Sony a1, a9 II, a7R IV, and a7S III fits onto the A7 IV Mirrorless Camera but is not designed for it.
Answered by: Ejona G
Date published: 2024-10-27

Does this fit the a9 iii?

Does this fit the a9 iii?
Asked by: Shawn
The Really Right Stuff Base Plate for Sony a1, a9 II, a7R IV, and a7S III will not fit the A93. You can use this Rogeti L bracket instead: https://bhpho.to/3BiG8TW
Answered by: Dan W
Date published: 2024-09-16

Will this base plate fit the Sony a7RV?

Will this base plate fit the Sony a7RV?
Asked by: Reggie
Yes, the Really Right Stuff Base Plate for Sony a1, a9 II, a7R IV, and a7S III fits the Sony a7rV.
Answered by: Rob K
Date published: 2023-01-12
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