Replaces part number 3500.
This is a /Manfrotto 241FB Pump Cup for lightweight photo/video equipment. The disc's diameter is 5.8" (14.7 cm). It weighs 1.36 lbs (618 g) and has a 3/8" thread to accomodate most any Bogen/Manfrotto head. The pump adheres the base to flat, non-porous surfaces.
Replaces part number 3500.
I have had no luck getting any type of suction. At first I thought I got a bad apple of a unit so I contacted B&H and they happily sent me a new one. Same thing, no matter how hard I tried I couldn’t achieve any suction. I tried both units on clean bathroom mirrors, windows, smooth kitchen granite countertops, etc. I tried putting ample force myself while pumping and had no luck. I would pump for a solid 10-15min straight which is infuriating when you just want something to work as its supposed to. My goal that I had for this was to put a lightweight rig on video shoots I do with cars but I really don’t trust this thing from my experience. I don’t want to go on a shoot and people are waiting on me pumping for days trying to get suction. I just want to clamp it down and move on. Again I was really wanting to like this thing.
Haven't used it with camera gear yet, but have mounted it to several surfaces for testing. When the unit does attach to a surface, it is solid and holds well. Will have to continue to experiment with this, but it works well so far. Well made, the rubber base may need to get broken in as I had a difficult time getting it to release initially, but works fine now.