Luminous Landscape Forum
Equipment & Techniques => Cameras, Lenses and Shooting gear => Topic started by: paulgrundy on December 21, 2016, 08:08:40 am
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I recently had a 24TS-E mk2 repaired by Canon CPS here in London. They replaced the shift unit.
A fast 3 day turn around, but I have noticed that in the metadata the lens is now shown as a 17 TS-E. I have tried it on 2 bodies, I Sony, 1 Canon with the same result.
The bottom section of the 2 lenses look identical apart from the lens name plate. And it works fine. I am guessing that the same shift unit is used for both lenses?
Is there anything I should be worried about?
I am calling in at Canon tomorrow so I'll ask them but just thought I would see if anyone else here has had a similar experience.
Merry Christmas,
Paul
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Only issue I would consider is that the built in lens corrections between the two would be a bit different, distortion, vignetting. I assume that ACR/LR C1 are reading the metadata of the file to apply the appropriate correction.
Interesting issue.
Paul Caldwell
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There's no built-in lens correction for the TS-E lenses. That's their one big weakness.
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Hi,
My guess is that there are two reasons:
- The lenses are pretty well corrected
- The software correction would need shift and tilt info. I don't know if say Lightroom could use that. Hasselblad has such corrections when used with the HTS, so it is obviously a preactical method.
Best regards
Erik
There's no built-in lens correction for the TS-E lenses. That's their one big weakness.
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Hi,
My guess is that there are two reasons:
- The lenses are pretty well corrected
- The software correction would need shift and tilt info. I don't know if say Lightroom could use that. Hasselblad has such corrections when used with the HTS, so it is obviously a preactical method.
Best regards
Erik
There's no reason a profile couldn't be built, even if it needed manual input of tilt/shift data.
There is still significant lateral CA which needs to be corrected at large shifts. It's a complex distortion, not a linear one, so the default Photoshop tools don't work very well for this - a profile would be much better.
Regardless, the lack of lens corrections means that the incorrect metadata has no practical effect.
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That's just a pain, I would have Canon correct it. It's a simple lens firmware flashing process which only they can do - somebody screwed up on their end.
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That's just a pain, I would have Canon correct it. It's a simple lens firmware flashing process which only they can do - somebody screwed up on their end.
+1
Wrong lens metadata can interfere with other processes as well, it sounds like a wrong firmware was flashed, a SNAFU at their end.
Cheers,
Bart
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The lens is now back with Canon.
I said in my first post it worked fine but I have since shot a test, stitching 3 images together and it came out with a noticeable amount of pin cushion -an issue I have not had before with this lens.
Hi Paul,
My copy of that lens is virtually distortion free. So I would indeed not accept a lens with noticeable distortion (unless a stitching issue), especially if it was better before having it serviced. And the EXIF issue clearly indicates something was rotten in that department anyway.
Cheers,
Bart