photic

I recently got this adapter to mount my Hasselblad 50/4 Distagon C version lens on my Nikon D750 - FotodioX Pro Lens Mount Adapter for Hasselblad V HBV-NIKF-PRO The first hour or so seemed good - shooting wide open or using the DOF preview lever to stop down and shoot (then opening up aperture blades by switching the lens to wide open at f4). However it randomly jams (the lens shutter blades suddenly close and can't be released again with aperture ring or DOF lever). There doesn't seem to be a pattern to when or how. When it happens, I have to wind the lock on the lens to re open the aperture blades as per this video - It's happened a few times already in the course of one day. Do you think the problem is the adapter? Or the lens? Or something about my technique?

Hi everyone, thanks for all the useful advice! So the consensus is I can use the tripod without this plate, but I'd need to get something else to sit in its place: a centre column or a head that fits in the hole? So far I was just thinking of getting the simplest Arca Swiss Z1 or the Acratech Ultimate to add with this (which I believe require the missing plate), so those options don't look too great. With that in mind, I'm leaning towards getting a used 3541LS instead that's for sale locally - it comes with the plate and a Z1 head already included. Just seems like it might be less hassle and a smarter move overall ...

Hi everyone, I'm looking at buying a used Gitzo locally but it doesn't come with the centre plate (see photos below). This is a Gitzo Systematic 3542LS which seems like a great model and the used price is a good deal. I'm hoping to replace my much more entry level Manfrotto with it, to get better stability and easier setup/takedown. Unfortunately, it doesn't come with the top mounting plate piece that a new one sells with. If it doesn't affect use I'd like to buy it, but not if it's crucial. So maybe a Gitzo owner can chime in if they know?? (cross posting this from Rangefinderforums in hopes of getting an answer before it's gone) Do I need this piece to attach a tripod head to or no? If I don't have it, what will I miss out on that I might not be aware of? I'm worried there's something I'm not thinking of besides the bag hook, or that it totally won't work without this plate. Basically, if I buy this would I then have to replace that missing piece ($100 or so) or can I do fine without it? Here's the image of the tripod legs I'm considering, without the piece: And here are a couple of shots of the "normal" look when the piece is in place: Finally here's a picture of the replacement piece (I think that's it anyway) from B&H Photo: