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11/27/2004 04:21:52 PM · #1 |
How are these lenses beneficial?
A google search only confused me.
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11/27/2004 04:27:12 PM · #2 |
Originally posted by Geocide:
How are these lenses beneficial?
A google search only confused me. |
They allow some limited movements of the lens plane similar to what is possible with the front standard of a view camera.
If you don't know that you need one, chances are you don't need one.
Message edited by author 2004-11-27 18:17:17.
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11/27/2004 06:19:23 PM · #3 |
Tilt/shift lenses allow for correcting the perspective effects seen when shooting architecture, when the sensor plane is not parallel to the building. Tilt can also be of benefit in landscapes and for some macro work, where the plane of focus can be tilted so it is not parallel to the sensor.
Sorry I can't provide examples, as I don't own and T/S lenses. Yet.
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11/28/2004 03:24:14 PM · #4 |
| I was considering one of the Russian T/S lenses, but was unsure if they would mount to a 10D, and found conflicting reports of EOS mount availability. I think it can be done if you buy the thread-mount lens get a "T-Mount" EOS adapater. Even with a big-name T/S, (Canon/Nikon) it's totally manual -- exposure and apeture are not electronic. However, I decided that virtually everything that a T/S does can be done for free in Photoshop. Usefulness of T/S lenses are pretty much limited to film. They do peg the needle on the Gear-Geek-O-Meter. |
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11/28/2004 03:36:29 PM · #5 |
Originally posted by alanbataar:
...However, I decided that virtually everything that a T/S does can be done for free in Photoshop. Usefulness of T/S lenses are pretty much limited to film. They do peg the needle on the Gear-Geek-O-Meter. |
I respectfully must beg to disagree. There is absolutely no way to shift the focal plane in PS. What is in focus is in, and what is out is out (ignoring very minor corrections possible with deconvolution). Perspective correction is of course possible and easy in PS, however severe stretching can and does occur; that will lead to blurring that will make larger prints less practical.
In short, T/S lenses do have their uses, and cannot be replaced by PS.
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11/28/2004 03:39:12 PM · #6 |
Originally posted by alanbataar:
Even with a big-name T/S, (Canon/Nikon) it's totally manual -- exposure and apeture are not electronic. However, I decided that virtually everything that a T/S does can be done for free in Photoshop. Usefulness of T/S lenses are pretty much limited to film. They do peg the needle on the Gear-Geek-O-Meter. |
You should still be able to shoot in Av mode or M. I know I can with my telescope using a T-mount adapter.
The one thing that T/S lenses can do that is difficult, if not impossible, in PS, is to control the plane of focus and move it away from being parallel to the film or sensor.
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11/28/2004 03:41:13 PM · #7 |
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11/28/2004 10:47:34 PM · #8 |
| I didn't realize that there are depth of field ramifications with the T/S lens -- I had thought it was exclusively perspective correction. Good link, thanks. Dang, I hate being wrong, especially in public! ;) |
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