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photo:canontse17mm

Canon TS-E 17mm f/4L tilt shift lens

introduction

  • the 24mm shift lens is the traditional architectural lens for a 35mm full frame camera, but this lens is the first 17mm tilt-shift lens ever produced.

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
    • on APS-H cameras, it gives equivalent of a 22mm field 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

  • the tilt mechanism enables one to get all the scene in focus without resorting to extremely small apertures

architecture

  • shift mechanism allows perspective control

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

tilt calculations

  • 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)
    • J = lens focal length / sin(tilt angle)
  • 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

  • COC = 0.024mm == 3.2 pixels
  • angle of view = 21mm on a full frame camera

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

see more examples:

reviews

photo/canontse17mm.txt · Last modified: 2015/09/20 13:29 by gary1