I have a few questions for anyone who has a PB-4 or is familiar. And\nsome discussion below.\n\n1. Do I need an extension ring to mount on a D200?\n\n2. Does at least one of the end caps on the 4 rails come off? I saw one\nmodified to shorten it and am also curious if two female PB-4 mounts\ncould be attached, switching out the actual mounts for more flexibility\nin tilting & shifting. Shortened modification:\n[URL]http://farm2.static.flickr.com/1139/1396372967_f682af0555.jpg?v=0[/URL]\n\n3. When rotating from landscape to portrait, can you stop anywhere\nbetween? I'm guessing it's just a matter of possibly being too loose so\nthat things wouldn't stay put but if there's enough tension this might\nbe workable.\n\n4 the adjustments for tilt & shift are levers on the front, how do these\nwork? Does the lever just loosen it and you push it with your hand or\nsomething else? Are these pretty secure for a heavy lens if the unit is\nset at 90 degrees to get vertical movement?\n\n5. What does the small 'thing' on the front lens mount do? It looks like\nmaybe a place to attach an aperture diaphragm... if there was more\nmechanisms inside..\n\nHere's an interesting modification allowing a lens to get closer to the\nsensor for infinity focus by mounting it on the inside of the mount.\n[URL]http://homepage2.nifty.com/akiyanroom/redbook-e/collection/blue.html[/URL]\n\nAn off-the-shelf setup for this kind of work is a Novoflex Balpro TS but\nthat costs </body>,300. One neat feature is it mounts on the lens, not on the\nbody which should make movements more intuitive (and more precise for\npanorama shifting though that's not much of an issue with today's\nstitching software). Another nice thing is it looks quite a bit more\ncompact than a PB-4 although I wonder how sturdy it is. The Balpro has\nmovements in front & back too. A sawed down PB-4 would be a much more\nmanageable size. In fact if it could be mounted on a simpler old 2-rail\nbellows that would be even smaller and the focusing rack isn't needed\nfor infinity work:\n[URL]http://www.pacificrimcamera.com/images/103798.jpg[/URL]\n[URL]http://www.pacificrimcamera.com/pp/nikon/bellows.htm[/URL]\n\nThe other option is a Zork setup but that gets real expensive when you\nput all the parts together:\n[URL]http://www.zoerk.com/Zoerk%20info/product_guide_current.pdf[/URL]\n0 MFS tilt\n(includes:\n0 Tilt tube for\n9 Mini Makro Mount adjustable 'extension tube' for focusing)\n9 additional set of tubes\n 35mm adapter\n0 shift adapter\n Tripod socket for mounting lens instead of body\n L-bracket for maintaining nodal point\n</body>,300 total.\n\nThis has a nice 30 degree tilt and parallax free shift for pano's and\nit's super compact but I think only really works at infinity with large\nformat, or medium format without the shift adapter and I assume a heavy\nlens would just flop over by it's own weight on the tilt mechanism.\n\nHere's a detailed summary of pretty much all the options:\n[URL]http://www.stitchpix.com/options.html[/URL]\n\nThis quote from there is funny:\n"Once upon a time in the far, far away land of Finland there was\ndevelopéd a system quite similar to the Cambo Ultima 35 but a lot\ncheaper and more innovative and yea! it was slain by mysterious and\narcane forces of darkness and thus it was smote and lain low these many\nyears hence."\n...perhaps refers to this: [URL]http://www.naturfotograf.com/28pc.html[/URL]\nbtw that looks a lot like the Novoflex but a bit smaller... it's not\nsomething that can be found any more and if you did find it the price\nwould be silly.