Remember that as you focus a true macro lens, magnification changes. To maintain your desired magnification, you need to move the camera to obtain the correct focus point. This is an exercise in frustration without a macro focusing rail. 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 system 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.
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 the ballhead 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.
B150-B Macro Rail:
Really Right Stuff compatible dovetail extends along the bottom of the rail. Rail can also be mounted using ¼”-20 tripod socket. Stage release lever allows positive lock & release of stage and integral lever-release clamp offers optimum quick release convenience with an ultra-low profile.
Includes Lens Mount and B2-FAB clamp. The LMT gives sufficient height clearance to allow even the tallest camera bodies to rotate freely without hitting the rail. The LMT is hollow and has two laser-engraved scales; allows precise lateral positioning.
B150-B Ultimate Package:
Includes two B150-B Macro Focusing Rails for greater control over fine positioning. Using two B150-B rails delivers geared motion both fore and aft as well as left to right. This package also offers the versatility of allowing the use of both camera plates and lens plates.