to top
Camera accessories
Lens accessories
Tripod accessories
«Photo equipment
Body Caps
Camera Protection
»Eckla carts & Accessories
Eye Cups
»Flash Accessories
Lens Caps
Flash Brackets
Focusing Rails
Stacking & Step Rings
»Quick Release
Rain Protection
»Screws, nuts, keys
Shoulder Mounts
»Straps & Co.
»Tripod Heads
»Video Equipment
»DVDs & Books
Ball Heads
Gimbal Heads
Quick Release
Camera L-Brackets
Photo equipment » Macro equipment » Focusing Rails »

Really Right Stuff B150-B: Macro focusing rail

"Macro Focusing Rail and Stage with Linear Motion Lead Screw."

  • Out of stock - Pre-order now!, Delivery time: 22-26 days*
  • Shipping Weight: 0.66 kg
454.90 €
incl. VAT
plus shipping charges

The B150-B is our premium linear motion lead screw focusing stage and rail. The B150-B is designed to mate seamlessly with our quick release systems in as compact a package as possible. The bottom rail comprises a Really Right Stuff-compatible dovetail that mates with your ballhead clamp while the stage integrates our patented lever clamp that connects directly to your Really Right Stuff camera plate.

Fine focusing is precise. Camera to subject distance can be adjusted in minute increments for super-fine focus; lead screw delivers 1.25mm of travel per full revolution.

Rough positioning is done in one of two ways: either press the stage release lever and slide the stage on top of the rail or loosen the jaws of theballhead clamp and slide the rail within the jaws of the clamp. This compound adjustment feature effectively doubles the total gross adjustment range. Turn the focus knob at the back or front of the rail for super-fine focusing. The entire assembly is compact and rock solid. Purchase dedicated body plate separately.

Key Features:

  • Really Right Stuff compatible dovetail extends the full length of the rail. Rail can also be mounted using industry standard 1/4”-20 tripod socket.
  • Integral lever-release clamp offers optimum quick release convenience with ultra-low profile.
  • Gross adjustment is made by shifting either the stage or the rail, or both (see left).
  • Fine adjustment is made with the lead screw focusing stage, which provides additional 103mm of movement. Total adjustment range is 231mm (9”).
  • Laser-engraved index marks on clamp assist lateral positioning; one on center, two 24mm apart on center, and two 36mm apart on center. Rail is laser-engraved on both sides in 1mm increments.
  • Precision CNC machined in the USA from solid aircraft-quality aluminum and finished in a beautiful matte-black anodize. All excess mass is removed to minimize weight and all corners are radiused for beauty and comfort.
  • Comes packed in a lightweight, snug-fitting neoprene Op/Tech USA Soft PouchTM protective case with logo and built-in locking belt-clip.
  • Also makes a great nodal point rail (see panorama equipment).
  • Need geared motion in both the “x” and “y” axes? Stack a second B150 for the Ultimate B150-B Package.
  • Single off-center 1/4"-20 socket on bottom of rail.


  • Length = 5.9 inches / 150mm
  • Width = 2.8 inches / 71mm
  • Height = 1.35 inches / 34mm
  • Weight = 15.1 ounces / 428g
Write Review Ask us questions about this product
show more »Customers who bought this product also purchased
Flash X-Tender FX-3 [vebbrfx3]
Flash X-Tender FX-3
BH-1 Ball Head Pouch [BH-1P]
BH-1 Ball Head Pouch
Really Right Stuff BP-CS Multi-camera plate [BP-CS]
RRS BP-CS Multi-camera plate
*Only for deliveries inside Germany.
Please find information for deliveries into foreign countries here » Shipping Conditions and Fees.