The Really Right Stuff MPR-B Index Stop Bar with Thumbscrew (2-Pack)from Really Right Stuff MPR-B Index Stop Bar with Thumbscrew (2-Pack)is compatible with all multi-purpose rails and camera bars. To use, simply clamp on an Arca-type compatible rail or gimbal head to mark a place or to use as a safety stop.

When photographing panoramic shots it is important to mark a no-parallax point to keep the shot consistent. This is when the index stop comes into play. Once the optical center is determined, the stop bar marks the point so the setup can be recreated. The stop bar has a nylon thumb screw, which locks the bar into place, and is adjustable anywhere on the rail or camera bar.

This convenient kit contains a set of two MPR-B stop bars.

For Multi-Purpose Rails or Camera Bars    Use as a Safety Stop on a Gimbal Head    Use to Mark No-Parallax Point    Nylon Thumb Screw for Adjustment

Compatible with Really Right stuff's multi-purpose rails, camera bars, and PG-02 gimbal head

Marks a no-parallax point

Used as a safety stop on rails, camera bars, and gimbal head

Nylon thumb screw

Related Questions and Answers

Q: 1. Has anybody used this with the BH 30 ballhead?

A: BH-25 fits perfectly.I tried BH-30 also - it fits OK but... BH-30 has slightly larger base dia.

Q: 2. What is the actual base diameter? Was wondering if my RRS BH-55 Ball Head with Lever-Release Panning Clamp (2.9 base diameter) might work w this ultra pocket pod even if it looks to be slightly wide.

A: I have a RRS BH-55 ball head. I put it on my pocket pod and it does indeed function the same as if it were on a larger tripod. As was already stated, even with the legs fully deployed, they do not touch the bottom of the BH-55 ball head.

Q: 3. When would I use such a small tripod?

A: on a table top to shoot 'home videos'

Q: 4. Does this tripod have a bubble level?

A: No, it does not. But add something like this and you'll be able to level your camera: Vello Low Profile Bubble Level BH #VEBLHS1 https://bhpho.to/39PKbp6

Q: 5. Will this rail work with the Really Right Stuff PG-02 LR Pano-Gimbal Head with B2-LR II Lever-Release Clamp?

A: Yes those two would work just fine together.

Q: 6. Is the spring loaded hinge between legs and base plate robust or a weak point? Can the spring dislodge easily?

A: There is no issue with the hinge below the base. RRS makes excellent products. The load capacity of this tripod is a solid 15lbs .

Q: 7. The tripod and the BC-18 ball head both have a male stud, so how to they fit together?

A: The tripod base has a female 1/4"-20, and the BC-18 Micro ball head has a 1/4"-20 male, so they screw right together.

Q: 8. is this rail long enough to use for pano's with a 70-200 f2.8 and full frame camera (5d)?

A: for the 70-200, I would get a longer rail.

Q: 9. Is that with new rrs logo?

A: This will be the latest product available from RSS.

Q: 10. What is the accessory seen in the 4th picture of the product? Looks like a macro rail adapter but I could not find any information about it.

A: That is a part that RRS does not make any more.And you can use many other rails with that as it is Arca-Swiss style connection.