see also:

• http://www.canon.com.au/en-AU/Pro-Photography/Pro-Lenses/TS-E%2090mm%20f_2_8
• perspective control, shift and/or tilt lenses
• Canon TS-E 45mm f/2.8 tilt shift lens
• Canon TS-E 24mm f/3.5L tilt shift lens
• Canon TS-E 17mm f/4L tilt shift lens

90mm tilt shift lens on a Panasonic GH-1 Micro Four Thirds system

• 2011 prices suggest $A1999 new online
• minimum focus 50cm 0.29x magnification (0.38x on a 1D)
• six elements in five groups, in a Gaussian-type optical system
• recessed front lens
• 58mm filter thread
• manual focus
• up to 8deg tilt, 11mm shift and 90deg rotation
• nice bokeh
• Super Spectra coatings for accurate colour balance and enhanced contrast
• many reverse the factory default lens tilt-shift orientation otherwise the tilt tends to counteract the shift but this causes some vignetting on full frame
  • The lenses come preset from the factory with the axes opposite each other, but a Canon service center can adjust them so that they are on the same axis. This way you can use Scheimflug and a rising front (for example) at the same time.
  • see http://www.northlight-images.co.uk/article_pages/modify_canon_tilt-shift.html
• http://www.northlight-images.co.uk/article_pages/ts-e90_tilt-shift.html
• http://www.fredmiranda.com/TS-E90/
• my 1D TiltShift

• 90mm f/2.8 with lovely bokeh makes for a very handy, sharp, shallow depth of field portrait lens at f/2.8
• if one wishes to give the appearance of even shallower DOF, one can use the tilt mechanism to advantage, in the opposite way in which it is used for in-focus landscapes.
• of course, the biggest issue here is the lack of auto-focus

• at closest focus of 0.5m, it gives 0.29x magnification on a full frame dSLR but this can be increased by either:
  • with Canon EF-12 extension tube $A159 gives 0.56-0.18x
  • with Canon EF-25 extension tube $A279 gives 0.78-0.40x
  • with Canon 1.4x teleconverter gives 0.41x magnification
  • one can even combine an extension tube with a teleconverter
  • use on a cropped sensor camera such as a 2x crop Micro Four Thirds system
• although magnification is not up there with a true macro lens, the tilt capability allows images that are just not possible with a macro lens, particular if you are imaging a subject with the key points of interest being in much the same plane which is not parallel to the camera sensor, such as a daisy aesthetically angled rather than straight on to the camera.
• this lens is brilliant for many floral subjects

• the tilt mechanism allows emphasis of a subject by creating selective focus as with this image of a clock taken with this lens on a Micro Four Thirds system to show that even a flat subject taken head on can be modified:

• the tilt mechanism enables selection of a plane of focus to accentuate your subject and make it pop from its surroundings.

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

• shift mechanism allows perspective control, although the 90mm focal length will be too long for many subjects

• 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

• derived from http://www.cambridgeincolour.com/tutorials/tilt-shift-lenses2.htm
• 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
• at closest focus of 0.5m, you can change the plane of focus to max. 39 deg from horizon (or 51deg from perpendicular to camera), thus if you angle you camera down on your flat subject at an angle of 51deg with an 8deg lens tilt, your flat subject should be in focus (without tilt, your camera sensor has to be at parallel to the flat surface)

In this example I used rotated tilt to select a plane of focus through her hand and left eye using a Canon 1D Mark III with live preview to focus on her eye.

see more examples:

• some of my tilt-shift photos on Flickr
• PBase photo examples