A patent uncovered by Northlight shows the optical formulas for zooming tilt-shift lenses has appeared over at the USPTO.
The patent appears to mention two separate and interesting tilt-shift lens technology.
The first, the patent shows two internal shift modules. This would help to maintain image quality when tilting the lens. The patent shows a 50mm f/4 design with the two shift modules.
The second part of the patent shows off new zooming tilt-shift lens designs.
Both a 24-100mm f/4 and a 30-80mm f/4 are included as embodiments.
Canon TS-E 24-100mm f/4 embodiment:
Focal length: 24.74mm – 49.55mm – 99.94mm
F-number: 4.13 – 4.31 – 4.42
Half angle of view: 41.17° – 23.59° – 12.21°
Image height: 21.64mm – 21.64mm – 21.64mm
Total lens length: 159.00mm – 174.75mm – 200.33mm
BF: 43.99mm – 55.44mm – 69.75mm
Canon TS-E 30-80mm...