So I've been thinking of the challenge of dealing with what AA referred to as "the problem of convergence" and the limitations of DSLRs in architectural photography. This led me down the rabbit hole of too much math, the entrance and exit pupils of the lens, nodal points, etc. So, I began constructing a DIY pano head with the idea of using my nifty fifty in a vertical orientation and shooting a series of images that I would then overlap, stitch, or whatever you wish to call it.
So thoughts from those with some experience in these matters would be appreciated.
Classic illustration of the Scheimpflug rule in action. The blue area is the captured Depth-of-Field.
Tilting the lens up simultaneously with an upward shift is at the core of Architectural Photography , since it provides the correct reproduction of vertical lines while at the same time increasing the depth of field. Sigma SD14-FD Mount pictured.
Thanks. I hope to try my pano head in the next week
I think the pano option on a tilt-shift lens comes more from the shift option than the tilt option, correct?
Douglass, I wonder if that link will help me think about how to use my lensbaby more effectively.
Nightski wrote:
I think the pano option on a tilt-shift lens comes more from the shift option than the tilt option, correct?
Many panos are
vertical images stitched together, where the tilt & shift functions are rendered moot on a DSLR. View cameras do not have this restriction.
Nikonian72 wrote:
Many panos are vertical images stitched together, where the tilt & shift functions are rendered moot on a DSLR. View cameras do not have this restriction.
That's not true. I watched John Greengo demonstrate a vertical pano in a creative live class. He never used the tilt function to do a pano. Have you ever used a tilt-shift? Do you understand the function of the shift? The Schleimflug Principle does not have anything to do with the shift function. The tilt function results in not having the focal plane flush with the sensor and it creates a very deep DOF or a very shallow DOF. What I am not sure of is if you tilt up or down to get deeper. I am also not clear how it differs from the lensbaby.
Nightski wrote:
That's not true. I watched John Greengo demonstrate a vertical pano in a creative live class. He never used the tilt function to do a pano.
I NEVER stated that tilt or shift is required for pano. I stated that tilt & shift on DSLR lenses are strictly for vertical corrections in an horizontal format, which makes them moot when a DSLR is turned 90-degrees for a vertical format pano.
Nightski wrote:
Have you ever used a tilt-shift? Do you understand the function of the shift?
I used a 4x5 view camera for years while earning my bachelor's degree from Brooks Institute of Photography. Both front lensboard & backboard of a view camera are capable of swing, tilt, & shift for both vertical and horizontal corrections, where as DSLR lenses can only tilt & shift on the vertical axis.
Nikonian72 wrote:
The Schleimflug Principle does not have anything to do with the shift function. What I am not sure of is if you tilt up or down to get deeper. I am also not clear how it differs from the lensbaby.
The OP of this thread mentioned Scheimflug in the title. If you do not understand this principle, then read what I posted above, and view the image of a TILTED front lens board. Shift is not mentioned.
After a few reworks, I am close to finishing my DIY pano head which is specifically designed for verticals. I had to redo the plate to which my DSLR attaches due to a small, but critical miscalculation. I will be adding a bubble level to the plate that attaches to the tripod. By carefully leveling the tripod, using the "virtual horizon" feature on my DSLR, and correctly locating the nodal point, I believe I will be able to create some panos of a few historic buildings in Portland without losing the tops of the buildings or dealing with the need to tilt the lens. I have a few spots picked out.
Nikonian72 wrote:
The OP of this thread mentioned Scheimflug in the title. If you do not understand this principle, then read what I posted above, and view the image of a TILTED front lens board. Shift is not mentioned.
You are right, Douglass. we are not understanding each other at all.
I can't imagine many people doing panos today if one to splice the film together.
LoneRangeFinder wrote:
I can't imagine many people doing panos today if one to splice the film together.
Use them on a DSLR.
Cheap Perspective Control lens/accessory for Nikon DSLR:
http://photo.net/nikon-camera-forum/00SEOK
Nikonian72 wrote:
Many panos are vertical images stitched together, where the tilt & shift functions are rendered moot on a DSLR. View cameras do not have this restriction.
I've shot panos with (35mm film and dslr) PC/tilt lenses for 4 decades - in verticle and horizontal format - Nikon and Canon. The T/S function is NOT moot when shooting panos. Rather, it can enhance my work by helping to keep more (desired) subject matter (top or bottom) in the frame, while keeping verticle building lines (or landscape edges) parallel to the view finder. The shift function IS often more useful than the tilt function in this situation, as another member surmised. Tilt primarily helps increase depth of field (in-focus subject matter) on single frame shots, but with skill, could be used for certain pano situations.
Shooting vertical with medium to normal focal length lenses and stitching in PP provides greater top/bottom coverage, more detail, and proper human perspective, compared to single super WA shots or massive horizontal panos. The shift feature on my Nikon, Canon, Ziess, (and a few excellent Russian shift lenses) almost always get used during pano shots..whether 2,3,4,5,6,7, or more frames.
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