I’ve been using an Arca Swiss Z1 ball head on my larger Gitzo tripod for about a year and love it. I added the Really Right Stuff PCL-1 Panning Clamp for panoramas along with a plate and various accessories. The system is great but kind of heavy so I started looking for a lightweight option for traveling.
I had recommended the Arca Swiss p0 (p-zero) head to a tutoring client based on reviews and specs. This is an ingenious inverted ball design that means you don’t have to have a separate rotator for panos. Because it’s the ball that mounts to the tripod, when you level the ball head the top plate is automatically parallel to the ground and allows perfect panos without an additional panning rotator. I also suggested that he put a Really Right Stuff clamp on the head.
It turns out there are two product numbers of the p0 head. The 801213 includes the new Arca Swiss Slidefix QS Quick Release which is not compatible with RRS. The 801211 is $70 cheaper and does not include the Quick Release clamp. My client had bought the one with the clamp so the first order of business was to remove the Arca Swiss clamp. This was not easy. The clamp is mounted with a 6mm screw, but the hex allen socket is pretty small and a metric size that I didn’t have. I took a trip to Crouch Sales, a specialty store here in the Dallas photo district that specializes in “bolts, nuts, anchors and more”. This is one of those great places that serves industrial clients, has deep inventory and the guys at the counter know what they’re doing. The salesman finally found a tool that fit but we couldn’t get the screw to break loose. It took clamping the allen wrench into some vice grips and twisting the wrench until it felt like it was going to snap before the screw loosened. Once the Arca Swiss QR plate was off it was easy to replace it with the RRS B2-40 quick release plate. If you do this modification yourself make sure to order the version with the 6mm metric screw. The model number is B2-40-LR-M6.
The system worked so well for my client that I decided to try one myself. First I called Precision Camera Works, the U.S. Arca Swiss repair center, to ask them about the difficulty of getting that M6 screw out of there. The technician I spoke to said that Arca really doesn’t want that QR plate coming off and soon would probably use an even stronger thread lock that would make it almost impossible to remove. He confirmed that the 801211 was the same head, just without the QR plate but with a small double threaded bolt that is 6mm on one end and 1/4-20 on the other. That’s the one I ordered from B&H. The next call was to the always helpful people at Really Right Stuff to confirm what I was about to do and make sure I was ordering the right parts.
When the head arrived I was happy to discover that a standard 7/16 socket wrench perfectly fits around the double headed bolt, grabs on the built in nut and makes it easy to remove. (SEE UPDATED INFORMATION BELOW FOR CORRECT SOCKET SIZE) The whole process took about 5 minutes. The head is much improved with the RRS clamp and now compatible with my other pano components.
UPDATE: A client had some trouble getting the screw out of the Arca Swiss plate and her experience might help others with the same problem:
Your post on the Arca Swiss P0 with the RRS clamp was excellent. I own a P0 and think it’s wonderful but, like yourself, was unhappy about the clamp options. At any rate, I wanted to give you some updated information that you may find useful. I removed the double threaded bolt with an 11mm thin-walled hex socket. It fit perfectly. In addition, you can use the M6 bolt – as you mentioned – but it needs to be 20mm or less. I tried the 25mm and it hits the ball.
UPDATE MARCH 25. 2015
I saw your post but I am not sure I follow on why you are removing the screw and then using an M6. What is wrong with what it comes with and using, for example, the B2-LR-II? It has a 3/8” thread which would screw on to it just fine? I am looking for this p0 myself and want to ensure I get the right setup! – Kaitlyn
Hi Kaitlyn. I first tried a B2-LR-II on the p0 but found it too big for that head. It hangs over quite a bit and gets in the way of handling. The blog post is for the smaller BR-LR which I found to be a perfect fit for the p0 and which doesn’t have a threaded center hole. Also, I liked the idea of using a couple of drops of Blue Loctite on the M6 screw. I do have the larger B2-LR-II on an Arca Z1 head on my larger tripod and it’s a perfect fit there. I hope that helps.
UPDATE MAY 27, 2015
Today I heard from Didier in France about his experience with modifying the Arca Swiss heads. He includes a new way to tackle this problem along with a link to a similar article from a French website.
About Your very interesting article ”Arca Swiss p0 head modified with Really Right Stuff clamp” on your Blog. I made this transformation of the Arca-Swiss head p0, there has several years and I just do the same thing on an Arca-Swiss d4 head. Since 2012, the screw of the clamp is mounted with, I think, epoxy glue. To remove this screw without risking to tear the threads of the hole, I locally heated the head of the screw with a ”Pyropen Weller” equipped with a nozzle ”hot air”. This will soften the adhesive and can easily unscrew the screw, without forcing.
Regarding the head Arca-Swiss p0, I noticed that the black synthetic washer between the head and the clamp degrade stability. I highly recommend to remove it (just attached by a double side adhesive film). Note that the Arca-Swiss heads sold with a clamp do not have this washer.
The same subject on a French forum:
Recto38 (from France)