Guys, Google "Nodal point" - bunch of good info on "analog" method. Here's a good one: http://www.kingpano.com/nodal_tut.htm RE panos in general, as long as subject is not moving, stitched digital pans are phenomenal. If you want to stop action film is best way to record "live" movement. http://www.panoramacamera.us/lookaround.html Another digital splice advantage on still subjects is to do blended vertical pairs. Who needs a $30K medium format!? AZ Build a 120/35mm Lookaround! The Lookaround E-Book 5ed. NOW SHIPPING http://www.panoramacamera.us > -------- Original Message -------- > Subject: [SPAM] Re: Is this something or nothing? > From: ADavidhazy <andpph@xxxxxxx> > Date: Sun, April 12, 2009 8:07 am > To: List for Photo/Imaging Educators - Professionals - Students > <photoforum@xxxxxxxxxxxxxxxxxx> > Herschel, I think the "trial-and-error" (or as you say analogue) way of finding > the best rotation point is the most efficient and practical way. The location of > the point seems to depend on a number of things and accounting for them all is > probably not a simple matter if you don't have information about the internal > design of the lens. And even if you do it is not simple! - andy > Herschel wrote: > > This is interesting. I use the fancy manfrotto QTVR set up with levelling head > > and 2-axis displacement sliding arms etc. > > I have done some experimentation with different lenses and I think you're on to > > something here. > > > > I must go back and look at the numbers more carefully because when I first > > started using it I used a 50mm lens and calculated where the nodal point was, > > then used that as a starting position and it wasn't quite right. I attributed > > this to errors in my measurements and the fact that lenses for 35mm cameras had > > complicated optical arrangements etc. > > > > But it makes sense to me, geometrically at least, that it's some other (Exit > > pupil point?) place. How do you calculate the position of the exit pupil... is > > it the aperture? I used the broomstick experiment that Walter talked about... > > which gave me what I wanted in a rather "Analogue" way
