The PX4 4.5" Arca-Type Double Dovetail Plate with SS2 Quick Release Adapter Port from ProMediaGear is a CNC machined T6061 aluminum plate with adjustable safety stops for telephoto lens feet. The stops move according to the length of the foot and prevent the lens foot from twisting upon the plate. The 1/4"-20 mounting screw slides within the slotted channel to allow the balancing of the plate against the lens foot while mounted on a head. Additionally, the adapter port is compatible with SS2 adapters and quick disconnect straps.

Arca-Type Compatible Double Dovetail    SS2 Quick Release Strap Adapter Port    4.5" CNC Machined T6061 Aluminum Plate    Adjustable Lens Foot Safety Stops    Slotted Channel Balances the Lens

Arca-type compatible plate with double dovetails for multiple attachment accessories

Adapter port is compatible with SS2 quick disconnect adapters and shoulder straps

Slotted channel enables the screw mount to slide back-and-forth to balance the telephoto lens

Adjustable lens foot safety stops prevent the lens from twisting within the plate

Related Questions and Answers

Q: 1. How do I set this up using a Nikkor 200-500mm f/5.6 zoom with a foot plate ? Videos always show me using the plate on a camera not on the lens. I'm trying to go from Manfrotto fluid head to Arca foot on the lens ?

A: You could use the Nikon 200-500 lens and for example this plate on the foot Photo Clam PCN102UP Lens Plate for Nikon AF-S 200-500mm f/5.6E ED VR BH #PHPCN102UP • MFR #PCN102UP

Q: 2. Did anyone try this with Manfrotto MV500AH Video head? Will it work?

A: Yes, it does. The PM501L is a little longer than the default 501 plate but it is the same specifications. There is a shorter version available (PM501 without the L) here: https://bhpho.to/3ryJpFM

Q: 3. Does this product fits a Hasselblad H4D-50? I will use it in conjunction with an Arca-Swiss C1 with Flip-lock.

A: Yes, you can use this plate on a H4D-50.

Q: 4. Hello, how much weight can the strap loops hold. I want to attach it to my Nikon 200-500 telephoto lens along with a Nikon D850. The strap I will be using is a Peak Design. Can the strap loops handle the weight ? Thank you

A: Though they have no specs as to what the max weight that the strap loop can support is, because it is made of cast aluminum alloy, you should have no issues hanging that set up from it. However, me mindful to check for dings or dents in the loop which could cause it to fail, and make sure there are no slices or nicks in the peak design and you should be ok.

Q: 5. Will this adapter work to convert a Gitzo G2272M head to Arca Swiss L bracket?

A: No, the gitzo quick release receiver is incompatible with the manfrotto 501 series plates that ProMedia uses on this adapter. You could consider attaching an adapter like Kirk QRC-2.6 Arca-Type Quick Release Clamp to your Gitzo quick release plate by way of the 1/4" thread you would normally attach to your camera. You'll also need a 1/4" to 3/8" Tripod Adapter/Bushing. This is not an ideal solution because you can still get loosening and twist where the Gitzo plate attaches to the Kirk adapter.

Q: 6. Can the rubber pas be removes easily to get a rigid camera to plate connection and avoid resonances?

A: The rubber on the ProMediaGear Universal 3.0" Arca-Type Quick Release Plate (Black) is glued on tight. It will not be easy to remove.

Q: 7. Is 3inch including strap loops? Does it not block battery door of D750?

A: The 3 inch dimension of the PX3 does not include the strap loops. And the current version has fixed strap loops, and not the removable loops as shown in the picture. This prevented me from opening the battery door on my Rebels. I'm not sure about the D750.I ended up getting the DTB-60, which has multiple screw slots that allow much more flexibility with positioning. I used them on 2 Rebels during a trip to Italy, and they worked great. The rubber padding keeps the plate from twisting, and the strap loops allow me to mount a hand strap on the right, and a neck strap on the left. I have since ordered more of these plates for my other cameras.The DTB-60 is also half the price of the PX3.

Q: 8. The description says The plate features removable strap loops that can be relocated to either side if desired. One of the strap loops block my battery door and I tried removing the screws, but the loops aren't coming off. How do I remove the strap loops?

A: I recall that now had a look and same as yours seems to be machined as one piece. Possible early production flaw.nice piece dose the job so a hack saw file and a dab of paint and wallah. Paul B

Q: 9. Will this also accept 3/8" screws?

A: Pro Media Gear does not make a 3/8-16 screw for this plate but you can convert any 1/4-20 screw to 3/8-16 using this Oben bushing: https://bhpho.to/2XhMHiu

Q: 10. Is it compatible with a RRS ball head?

A: Yes, the ProMediaGear Universal 3.0" Arca-Type Quick Release Plate (Black) is compatible with RRS ball heads.