I use a old Reis model 'C' tripod with my Rolleiflex 3.5F and it's crown diameter is 4 inches. I have a small ball head with the QR atop it and it works great. I don't mind the crown showing a bit - somewhere to place a circular bubble level. Rob -----Original Message----- From: rollei_list-bounce@xxxxxxxxxxxxx [mailto:rollei_list-bounce@xxxxxxxxxxxxx] On Behalf Of Mark Rabiner Sent: Sunday, April 06, 2008 12:48 AM To: rollei_list@xxxxxxxxxxxxx Subject: [rollei_list] Re: Heads & QR If like me you got a Reis made in Seattle tripod made of wood a few years ago you got a huge top platform 4.5 inches. Most ball heads except a big one I don't see made any more were just to small. They'd look like pinheads and the crown of the tripod would get in the way. And that big ball must weight a ton. I thought it was the B1 Arca but its not looking the same to me. But would be ok on this quite substantial heavy wood tripod. Which I have in a storage cube in Portland Oregon. Right now I'm using a light weight carbon Gitzo. http://www.riestripod.com/ Mark William Rabiner markrabiner.com --- Rollei List - Post to rollei_list@xxxxxxxxxxxxx - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' in the subject field OR by logging into www.freelists.org - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field OR by logging into www.freelists.org - Online, searchable archives are available at //www.freelists.org/archives/rollei_list