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Canon 24-105: A User Report

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Anonymous   09-04-2005 at 05:48:17 PM

Archived from groups: rec.photo.digital (More info?)

 

Camera 1Dsmk2
Light fall off in corners at 24mm

http://forums.dpreview.com/forums/ [...] e=14893461

Deryck

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Anonymous   09-06-2005 at 05:10:08 PM
- 0 +

Archived from groups: rec.photo.digital (More info?)

 

deryck lant <deryck@deryck.com> wrote:
>
> Camera 1Dsmk2
> Light fall off in corners at 24mm
>
> http://forums.dpreview.com/forums/ [...] e=14893461

Thanks for the pointer to this report.

The reviewer (Mark Kay) says the 24-105/4 is better than the 24-70/2.8
from 35-70mm; almost as good as a 35/1.4 prime. No 50/1.4 test done.

So this implies the best companion lens is the 70-200/2.8 rather than
the 100-400/4.5-5.6, otherwise there's a quality gap between 70 and 100.

To live with vignetting and/or light fall-off at 24mm, aren't there
photoshop plugins that brighten the corner gradients?

Reply to Anonymous
Anonymous   09-09-2005 at 07:37:48 PM
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Archived from groups: rec.photo.digital (More info?)

 

In article <431ddb80@news.meer.net> Bill Tuthill <can@spam.co> writes:
$deryck lant <deryck@deryck.com> wrote:
$To live with vignetting and/or light fall-off at 24mm, aren't there
$photoshop plugins that brighten the corner gradients?

Yup. PTLens (free) can do this, though I don't believe its
vignetting correction is automated (it has a database of lens
characteristics so it can automatically correct curvilinear
distortion based on the lens focal length in the EXIF data).

DxO has a program (not sure if it can run as a Photoshop
plugin) that takes this concept even farther, correcting CA
automatically (again, based on the lens and focal length used)
and I think it also automatically corrects vignetting.

I wouldn't be surprised if there were others, too.
--
Stephen M. Dunn <stephen@stevedunn.ca>
>>>----------------> http://www.stevedunn.ca/ <----------------<<<
------------------------------------------------------------------
Say hi to my cat -- http://www.stevedunn.ca/photos/toby/

Reply to Anonymous
Anonymous   09-09-2005 at 07:37:49 PM
- 0 +

Archived from groups: rec.photo.digital (More info?)

 

Stephen M. Dunn <stephen@stevedunn.ca> wrote:
>
> $ To live with vignetting and/or light fall-off at 24mm, aren't there
> $ photoshop plugins that brighten the corner gradients?
>
> Yup. PTLens (free) can do this, though I don't believe its
> vignetting correction is automated (it has a database of lens
> characteristics so it can automatically correct curvilinear
> distortion based on the lens focal length in the EXIF data).
>
> DxO has a program (not sure if it can run as a Photoshop
> plugin) that takes this concept even farther, correcting CA
> automatically (again, based on the lens and focal length used)
> and I think it also automatically corrects vignetting.

Thanks for the info.

Sometimes vignetting can be a good thing! Recently I received
a photo with blue sky where light fall-off occurred, and
washed-out white sky elsewhere. Did a dropper and bucket-fill
and now the image looks much better. :-)

Reply to Anonymous
Anonymous   09-16-2005 at 04:21:01 AM
- 0 +

Archived from groups: rec.photo.digital (More info?)

 

"Stephen M. Dunn" <stephen@stevedunn.ca> wrote in message
news:IMJxv0.5un@stevedunn.ca...
> In article <431ddb80@news.meer.net> Bill Tuthill <can@spam.co> writes:
> $deryck lant <deryck@deryck.com> wrote:
> $To live with vignetting and/or light fall-off at 24mm, aren't there
> $photoshop plugins that brighten the corner gradients?
>
> Yup. PTLens (free) can do this, though I don't believe its
> vignetting correction is automated (it has a database of lens
> characteristics so it can automatically correct curvilinear
> distortion based on the lens focal length in the EXIF data).
>
> DxO has a program (not sure if it can run as a Photoshop
> plugin) that takes this concept even farther, correcting CA
> automatically (again, based on the lens and focal length used)
> and I think it also automatically corrects vignetting.
>
> I wouldn't be surprised if there were others, too.
> --
> Stephen M. Dunn <stephen@stevedunn.ca>
> >>>----------------> http://www.stevedunn.ca/ <----------------<<<
> ------------------------------------------------------------------
> Say hi to my cat -- http://www.stevedunn.ca/photos/toby/

Photoshop CS2 can fix all that.

Reply to Anonymous
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