The QRC-4.2 Arca-Type 4.2" Quick Release Clamp with Classic Locking Knob from Kirk is a 4.2" long clamp that is compatible with most Arca-type quick release plates. The clamp is made of a combined aluminum alloy and stainless steel construction to provide long-lasting dependability. This 4.2" quick-release receiver features a classic locking knob with a large knurled design. The clamp design also insures that no internal mechanisms are exposed, improving the clamp's resiliency.

The clamp has also been engineered with safety stop relief grooves that provide improved safety when paired with Kirk camera plates. The clamp features a single spirit level to assist in proper leveling and centering lines for accurately positioning your camera within the clamp. A captive release knob has also been added to prevent the accidental loss of small internal parts and an internal slot has been added to hold the included 5/32 hex wrench.

NOTE: This clamp does not include a quick release plate.

Length: 4.2"    Arca-Type Compatible    3/8"-16 Bottom Thread    Aluminum & Steel Construction    Integrated Spirit Level    Captive Release Knob    Centering Lines & Degree Markings    Built-In Hex Wrench

Related Questions and Answers

Q: 1. Is this for a 1/4 20 or 3/8 20 screw from below?

A: This has a 1/4"-20 Female threading.

Q: 2. I recently bought sachtler FSB 8 Mark II , need to check will this plate will work with that ? i want to use my arca swiss plates with that.

A: The Kirk QRC-4.2 Arca-Type Quick Release Clamp can be screwed onto the plate that comes with the Sachtler FSB 8 MK II Fluid Head with Sideload Mechanism. With this screwed on top, on can attach arca type plates.

Q: 3. What is the maximum load the Kirk QRC-1 is designed/able to hold securely? Can I attach a Nikon D4 with a 70-200/2.8 lens to it?

A: I haven't had the specific configuration you have. I used it for a Nikon D750 with a 200-500 f5.6 without any problem.

Q: 4. Has anyone mounted this plate on a Giottos MH 1300? There is a small notch on the bottom side of their plate to prevent spin and Im wondering if this has one too.

A: Chris I not mounted this plate on a Giottos MH 1300, I use a 3D camera. This camera is a Matterport Pro 3D.good luck

Q: 5. wull it be suitable for a nikon 200-500 lens?

A: Yes. This system clamps very well, and be sure to get quality clamps like Kirk as they are key to success.

Q: 6. Will this Kirk Clamp work with the FEISOL PB-90 Panning Base ? do i need a reducer bushing or mounting hardware??

A: This clamp will go right on the PB90 head without any other parts.

Q: 7. Will this work with the Manfrotto 502AH Pro Video Head with Flat Base, will the adjusting nob on the clamp have enough clearance from the flat base on the video head for proper operation?

A: The Kirk QRC-4.2 Arca-Type 4.2" Quick Release Clamp with Classic Locking Knob won't allow you to move the knob as it will hit the top of the Manfrotto 502AH Pro Video Head with Flat Base. Because you're using this large video head, you would need the Kirk 4.2" Quick Release Clamp with Extended Knob (https://bhpho.to/3QXSKT2).

Q: 8. Is the knob also made out of aluminum? or is it plastic? other? Thank you.

A: The knob is plastic.Hard plastic very sturdy.This is an excellent clamp.I use it to fasten my Black rapid strap to my L bracket.

Q: 9. This Quick Release Clamp will work well with the Oben CTM-2500 Carbon Fiber Monopod?Thanks.

A: Yes. The Oben CTM-2500 5-Section Carbon Fiber Monopod comes with a reversible 3/8 -16 and 1/4 -20 mounting screw. The Acratech Arca-Type Quick Release Clamp also comes with a 3/8 -16 mounting thread and a 1/4 -20 adapter, so you can use it with either size mounting screw.

Q: 10. Does this version that B+H carries have the smaller safety stop that the version on Kirk's page does?

A: This is the same 1.8 in Quick Release Clamp Kirk shows on it's web page.