OK, I know this is really confusing for a lot of people until you get to touch/feel a lens with perspective controls, but I'm going to try to explain it anyway....
I own 3 lenses that shift. Shifting means the lens itself shifts from side to side. This changes the composition of the shot when you shift the lens. We're ONLY going to talk about shifting in this thread, the T in TS-E can be discussed in another thread if people want to....
There are a few basic reasons to shift (I'm sure I'm missing some here):but this thread is to mainly show how shifting works in terms of the lens movement, and what the images will look like.
- panos
- shifting makes for panos where each image has the same perspective. So stitching is VERY easy, the only stitching isssue is keeping the exposure/wb the same, and anything that moves can cause issues. But those issues are all present in other pano tecniques anyway
- perspective control
- this is the leaning in of buildings when you look up... If you want to avoid this, shoot with a shift lens, LEVEL the camera, then shift the lens up, instead of the camera. Lines will remain parrallel.
- keeping yourself out of a reflection (shooting "around corners")
- you can setup your camera/tripod a bit to the left of a mirror and shoot at the mirror with the lens shifted towards the center. No reflection....
This tutorial is done to show an example of the first reason to shift (the reason I shift). The second two reasons would be single shots with a shift involved.
Here's my example photo:
it's made up of 3 images, each shot is a horizontal image. Between shots the lens is moved up and down to alter the composition of the shot... Now you can move the lens up or down, and you can shoot with the camera vertically or horizontally, so there are 4 basic rectangular shapes you can get.
Here is the top shot taken with the camera horizontal and the lens shifted up:
this is what the lens looks like shifted:
what's on the left there, would have been up towards the prism on the camera body for the above example...
then, I shoot a shot with zero shift:
that is the same image you'd get with a normal 24mm lens on a 5D. NO DIFFERENCE.
the lens looked like this for that shot:
that would be the side profile of the lens.
then, I shifted the lens down and took this image:
this is what the side profile of the lens would have looked like:
see how the lens moves, and the image it makes moves as well? I hope this helps show it a bit better. As Jay said elsewhere, it really does help TONS to see it in person looking through the viewfinder and shifting it yourself. I really need to take a video of a series, or shoot shots of the lens on the body as it shifts to make it very clear.
Here's a link to the full file with the 3 images above stitched:
http://www.newschoolofphotography.com/water/tree
The lens has a giant image circle. Most lenses have vignetting and other issues at their edges w/o shifting, but the TS-E lenses have a large enough circle, you can shift them ~12mm in any direction w/o and issues. So you're moving their larger circles over the sensor showing it different images. Also, the mechanism that does the shifting will shift ~12mm either way, so it's 24mm total with the middle being the centered image. BUT THEN the whole mechanism ROTATES 360º with 30º stops (but you can stop anywhere, it just clicks into 30º increments). So this will let you shift the image any way you want. Combine the shifting with the ability to move the camera to horizontal or vertical compositions, and you have several options for stitched images.
Here's 2 more great tutorials on shifting:
http://www.cambridgeincolour.com/tut...ft-lenses1.htm
http://noriravi.com/ArticleTSE90;jse...0E8DCB99BF3782 (shifting is at the bottom)



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