Even though I just got one of
these adapters and I'm still learning how to use it, it's too cool not to share. Someone(s) figured out that since all you need is a spacer when using an SLR lens on a mirrorless camera, that tube can accomodate a compact tilt-shift mechanism. Even though I longingly covet the Canon TS-E 17mm f/4L, all of my lenses are now tilt-shift lenses :)
Tilt-shift, for those who are unfamiliar, is the principal difference between a view camera and your camera. Being able to move the lens does two things: removing perspective distortion (architectural photography) and rotating the plane of best focus (Scheimpflug condition).
To be sure, my lil' thing has limitations not found either on a true tilt-shift SLR lens or a view camera, but 1) tilt-shift lenses are obscenely expensive, 2) view cameras require
* film and 3) I have tilt-shift capability at focal lengths that simply don't exist, for example, my 400/2.8 lens- all images shot at f/2.8, the "depth of focus" is calculated to be about 0.4 m
"normal" (0 degree tilt): plane of focus is parallel to the sensor plane, not the roof
"Scheimpflug condition": tilting the lens about 5 degrees tilts the plane of best focus to be tangential to the line created by the intersection of the two roof panels: at best focus, that line lies within the plane:
Flipping everything upside-down rotates the plane of focus 90 degrees and gives the "anti-Scheimpflug condition"- this is a commonly used effect:
Here's another interesting tilt effect- see if you notice anything odd (before reading the explanation):
"Somehow", the foreground tree and background chimney are both in focus but everything midground is out of focus. The 'trick' is tilting the lens so that the focal plane contains the line running from the top of the foreground tree to the chimney- the midground (like the tree and window) are well away from that plane and so they are blurred.
*In a controlled (i.e. clean indoor) environment, one can use the camera without an attached lens, permitting view camera-type movements with a digital sensor.
[Edit]- Just wanted to add that using tilt-shift is about the exact opposite of "point and shoot". It's extremely slow and methodical work, not suitable for handheld photography at all.