PM501L Manfrotto-Type 6-inch Long QR Plate with Arca-Swiss Type Clamp Built-in (For 501PL - 502 - 504 - Nitro - RC3 - RC5 - NG Heads)
I bought a 501 head many years ago (1970s) . It is an arca system but is about 2 inches wide. This product is described as Manfrotto 501 compatible. It might fit a newer 501 but I strongly suggest looking at specs before ordering this. I found a work around for what I want to accomplish but I am disappointed in this description. What's up???
Safety alert. This plate is not the same design as the OEM plates. The Manfrotto safety stop release system does not work properly with the PM501L due to the safety stop catch on the PM501L plate being located improperly the head by 3/4 of an inch. The safety stop on the PM501L is not the same as the OEM Manfrotto plates by about 3/4 of an inch of difference in safety stop location so the PM501L plate can travel farther to the rear and beyond the clamp guides and jump over the safety stop if one uses this plate the same way he uses the properly designed Manfrotto plate. The PM501L plate is great but be forewarned that the safety latch stop is not designed the same as Manfrottos and can allow the plate and anything attached to it to come out of the Manfrotto head without using the safety release button on the head. They are not the same and the PM501L simply does not function as efectively with the Manfrotto head safety release feature. I like mine and it's easy to make them safe in the Manfrotto head. Any number of things can be super glued or two sided taped in the proper location for the plate stop to function with the Manfrotto safety system. I put a rubber drawer stop on mine where the stop is located on my Manfrotto OEM plate and it seems to be adhering fine to the plate and the plate stays down in the clamp properly now. Other than that this is a really nice tool.
Have the short version (PM501) for an older Manfrotto fluid head. After getting the Nitrotech that uses a longer plate, it was a nice surprise that the PM501 worked in it, but its not designed for that purpose. This PM501L longer plate gives a bit more flexibility with balancing and safety. Build quality is great just like the PM501. Really identical, just longer. Dimensions are perfectly matched to the Manfrotto long plate. Works great! It really does save a bit of time- not having to mount an Arca plate to the Manfrotto plate - and yet another area for a potential loose connection.
I use this in place of the Manfrotto-style plate on the DJI Ronin-S. It fits, but doesn't lock down as tight as one may want, especially when using a heavier camera. This is no fault of PMG, as I believe the DJI supplied plate is ever-so-slightly wider than a Manfrotto standard plate. 2 small pieces of electrical tape attached to each side of the plate solved the problem. Highly recommended.
I buy it to use with iFootage X2 Mini Pan&Tilt head. It more easy to put camera with arca swiss L-plate on X2 Mini Head. It work great but i hope they use brass washers between knob and clamp it might be smoother when tighten it.