photo:canontse17mm
Canon TS-E 17mm f/4L tilt shift lens
introduction
specs
introduced in 2009;
+/- 6.5° Tilt and ±12mm Shift
18 elements in 12 groups
Tilt and shift mechanism rotates +/-90° allowing shift in any direction
Tilt mechanism rotates +/-90° allowing tilt in any direction relative to the shift
SWC Sub-wavelength structure and super-spectra coatings minimise ghosting and flare
8 blade circular aperture
104deg angle of view
close focus 0.28m; (maximum close-up magnification: 0.14x)
filter is not possible as protruding convex lens
can be used with 1.4x teleconverter to give 24mm field of view but camera may not display adjusted aperture reading and it adds a touch of barrel distortion
820g, 107mm long x 89mm wide.
versatility of this lens
landscape photography
architecture
panorama stitching
place the camera on a tripod and use the shift mechanism to take 3 separate images which can then be stitched to create a panorama
you may want to investigate using a lens-based tripod mount to prevent the lens entrance pupil from moving when shifting
tilt calculations
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J point is the distance below the camera that will be in focus (although this point will not be in the field of view of the lens)
for landscapes, where nearly everything is in focus one usually selects a tilt and focus distance that changes the focus plane to horizontal (ie. 90deg) with the camera still aimed horizontally but placed at the J point above the ground.
thus determine how far you want to be from the ground (based on tripod, perspective, etc), then determine from the tables what tilt you will need and the focus distance to achieve close to 90deg focus plane.
camera sensor size and aperture have NO effect on the angle of the focus plane BUT do alter the total angular depth of field, and thus the calculations should apply whether you use it on a full frame dSLR or a 2x crop
Micro Four Thirds system
tilt amount (degrees) | untilted focus distance (m) | angle of plane of sharpest focus (degrees) | J point |
6 degrees | 0.3m | 63.9 deg | 0.2m |
6 degrees | 1m | 83.7 deg | 0.2m |
6 degrees | 1.5m | 86.8 deg | 0.2m |
6 degrees | 2m | 88.3 deg | 0.2m |
6 degrees | 5m | 91.1 deg | 0.2m |
4 degrees | 0.3m | 52.1 deg | 0.2m |
4 degrees | 1m | 78.2 deg | 0.2m |
4 degrees | 1.5m | 82.7 deg | 0.2m |
4 degrees | 2m | 85 deg | 0.2m |
4 degrees | 5m | 89.2 deg | 0.2m |
4 degrees | 10m | 90.6 deg | 0.2m |
2 degrees | 0.3m | 31.9 deg | 0.5m |
2 degrees | 1m | 64.8 deg | 0.5m |
2 degrees | 1.5m | 72.9 deg | 0.5m |
2 degrees | 2m | 77.3 deg | 0.5m |
2 degrees | 5m | 85.4 deg | 0.5m |
2 degrees | 10m | 88.2 deg | 0.5m |
2 degrees | 20m | 89.6 deg | 0.5m |
2 degrees | 60m | 90.5 deg | 0.5m |
DOF calculations without tilt
on a Canon 1D Mark III
at f/4 wide open
lowest light level handheld at ISO 3200 and 1/25th second as no IS available: -1 EV
hyperfocal distance 3m (ie. set focus at that point and you will have most of the scene in soft but perhaps acceptable sharpness from 1.5m onwards)
BUT you can't get the out of focus areas as sharp when used wide open, so this will be an issue for low light handheld scenes, to achieve that you will have to stop the aperture down and this means long shutter speeds, subject blurring and need for a sturdy tripod.
focus distance | near DOF | far DOF | blur circle at far DOF range | blur circle at 4m |
1m | 0.2m | 0.5m | 24nm | 55nm |
2m | 0.8m | 3.8m | 24nm | 18nm |
3m | 1.5m | 226m | 23nm | 6nm |
50m | 47.1m | infinity | 0nm | 17nm |
examples
reviews
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only slight barrel barrel distortion of just over 1.1% albeit based on a somewhat wavy subfrequency. This is highly impressive for a lens in this class, although does increase to 2% with 12mm shift
1.3EV vignetting wide open (3.3EV at 12mm shift) reducing to 0.44EV at f/8 (1.3EV at 12mm shift)
centre sharpness peaks at f/5.6, edge and corner peaks at f/5.6-f/8, but overall peaks at f/8 when shifted 12mm
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photo/canontse17mm.txt · Last modified: 2020/04/12 09:17 by gary1