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

Arca-Type Compatible Double Dovetail    QD Quick Release Strap Adapter Port    4.5" CNC Machined T6061 Aluminum Plate    Adjustable Lens Foot Safety Stops    Slotted Channel Balances the Lens    Dual 1/4"-20 Mounting Screw

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

Adapter port is compatible with QD 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. 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: 2. Will this fit on a Manfrotto head that uses 501PL quick release plate?

A: The PX3 and PBX3 plates are built around the Arca-Swiss platform. The 501 plate series are slightly different. They are not compatible.

Q: 3. 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: 4. 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: 5. Can Peak Design strap loops be attached to the plate without getting in the way of the plate's being mounted to a tripod?

A: Yes, the strap loops on the Promediagear PX3 universal QR plate will allow you to attach PD loops without interference.

Q: 6. Can this be used on Nikon 200-50mm Tripod Collar? Thanks

A: If you're asking if you can attach it to the bottom of the foot that's on the tripod collar yes it will work there.

Q: 7. Will the plate accommodate 3/8" mounting screws?

A: Yes, the ProMediaGear 8" Arca-Type double dovetail plate adapts to two 1/4-20 Mounting Screws and optional can accept two 3/8-16 screws.

Q: 8. Will this plate fit a Manfrotto 502AH head? If so, is there a diagram or vid of how to attach it (I can't figure it out), if not, can you please link me to one that will fit? There is not one clearly listed as compatible. Thanks!

A: This clamp/plate will allow you to attach an Arca Swiss style plate to your Manfrotto 502 head. In addition to this clamp, you will need an Arca style plate to attach to this clamp. Click the link below to view the plate; https://bhpho.to/3fBbHsv

Q: 9. 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: 10. 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