Custom-fit strength and modular freedom, engineered to keep your Sony perfectly aligned and ready for every shot
Precision Locked, Versatility Unleashed
Get unparalleled precision with the BA1 Plate System from Really Right Stuff, tailor-made for your Sony A1, A7RIV, A9II, and A7SIII. Each plate emerges from solid blocks of 6061-T6 aircraft-grade aluminum, promising the snuggest fit in the galaxy. Designed to dance perfectly with any standard 1.5" dovetail style quick-release system, these plates boast contoured anti-twist flanges, ensuring your camera stays aligned with the stars, not spiraling into a twisty black hole.
With a custom-machined 1/4"-20 threaded, captive-style mounting screw, these plates anchor securely to your camera body, bidding farewell to wobbles and shakes. But wait, there's more! Embrace the flexibility of a modular cosmos; these celestial plates serve as your traditional camera mounting guardian and welcome a dedicated vertical L-Component, transforming into a fully modular L-Plate for multidimensional captures. Welcome to the future of photography, where precision meets versatility in a symphony of engineering excellence.
All products from Really Right Stuff are guaranteed to the original buyer that they will be free from material or artistry defects for five (5) years from the purchase date. At our discretion, we will repair or replace the product.
Features
CNC machined from 6061-T6 aluminum for precision
Type II Black anodized for durability
Laser-engraved center marks for accurate alignment
Integrated QD (Quick Detach) sockets for easy strap attachment
Multiple 1/4"-20 threaded sockets for accessory mounting
Hand strap lug for secure handling
Full access to camera ports without plate removal
Battery accessible with plate attached
Compatible with RRS standard dovetail mounts
Dimension | Base Plate | L-Bracket Set | |||
---|---|---|---|---|---|
Length | 5.1 in. (129 mm) | 5.6 in. (143 mm) | |||
Width | 2.7 in. (68 mm) | 2.8 in. (71 mm) | |||
Height | 0.7 in. (19 mm) | 3.4 in. (86 mm) | |||
Weight | 3.0 oz (84 g) | 5.2 oz (147 g) | |||
Slot Travel Length | - | .9 in.(23mm) | |||
Country of Origin | ![]() |
What's in the box?
(1) BA1 Base Plate
(1) BA1 L-Component
(1) B107 Custom 1/4"-20 x 0.4" captive button head screw
(1) 1/4"-20 x 3/8" button head screw
(1) HexKey-5/32-inch
(1) User's guide

Sony A1, A7RIV, A9II, & A7SIII Base Plate

Where will you go?
Really Right Stuff
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