Adobe Photoshop Lightroom 3

[sanchi heuser]

Hi,

I'm interested in Photoshop Lightroom 3.
Advertising says it has also lens correction.
Does someone knows more about it?

And, is it only for use with digital cameras or also for work with large format lenses?
Thanks for any answers,

Andi

[Jon Shiu]

I don't know the answer, but you can download a fully functional 30 day trial at adobe.com

Jon

[Kirk Gittings]

What lens problems are you wanting to correct? It is set up with profiles for most modern DSLR lenses and it works very well with those (except....see below). Otherwise you can adjust it manually. BUT it assumes lens issues are symmetrical-with lenses that shift off axis it doesn't work so well because lens problems like barrel distortion CA etc. are only symmetrical when the lens is on axis. So it doesn't work well with Tilt/Shift DSLR lenses when shifted or LF lenses when shifted. If that makes any sense.

[bdkphoto]

The automated lens corrections work only with digital cameras, chromatic aberration, barrel distortion, vignetting etc. You can apply fixes manually to lenses that are not available automatically, i.e. LF images from a scan.

Its a free trial download.

[sanchi heuser]

What lens problems are you wanting to correct? It is set up with profiles for most modern DSLR lenses and it works very well with those (except....see below). Otherwise you can adjust it manually. BUT it assumes lens issues are symmetrical-with lenses that shift off axis it doesn't work so well because lens problems like barrel distortion CA etc. are only symmetrical when the lens is on axis. So it doesn't work well with Tilt/Shift DSLR lenses when shifted or LF lenses when shifted. If that makes any sense.

Thanks Kirk,

here's one photo. I asume it's distortion, it's made with a Nilkkor W 75
and I shifted. I couldn't make it with a longer lens because there were parking cars in front of the Café and I didn't want them in the frame.
With the 47 XL the problem is more obvious, especially when I get closer to the buildings.
OK photo with Nikkor W 75:




http://farm6.static.flickr.com/5149/5680414775_b8e389edd1_b.jpg (http://www.flickr.com/photos/58013730@N08/5680414775/)
Enuma (http://www.flickr.com/photos/58013730@N08/5680414775/) by andi_heuser (http://www.flickr.com/people/58013730@N08/), on Flickr



Last time I wanted to download a trial version from Adobe (Photoshop Elements)
it was a real hassle and it feeled like driving in a circle:confused:

[sully75]

it's pretty subtle but I see a little convergence and a little pincushioning.

Both of these you can correct with the photoshop (not lightroom) lens correction filter, it's definitely in CS3 and above.

[Kirk Gittings]

Thats when it shows up, wide lenses and close buildings. IMO I'm seeing some off axis barrel distortion (see curvature out at top corners?). An easy fix in PS (not LR). >Select All>Edit>Transform>Warp-drag out center and bottom of sides till it fixes the top curvature. I fix it all the time with DSLR T/S images where there has been a fair amount of rise.

[sully75]

Kirk, have you tried the lens correction filter? It's pretty sweet.

[Kirk Gittings]

Yes, it is a great tool, but it too assumes the issues are symmetrical and centered in the image-when you shift a lens the issues are no longer symmetrical and centered. The "center" of the issues shift in the direction of the shift. That is why on a lens that has allot of chromatic aberration and you shift the lens up-you will have more CA at the top of the image.

[mortensen]

... I never thought a LF lens (with a symmetrical design I assume) would produce barrel distortion! But it obviously does.
Personally I haven't encountered any barrel distortion on my 90 Grandagon-N

[Kirk Gittings]

... I never thought a LF lens (with a symmetrical design I assume) would produce barrel distortion! But it obviously does.
Personally I haven't encountered any barrel distortion on my 90 Grandagon-N

Its not very common until lenses get wider. On my 47 it is slightly noticeable with architecture-enough that I correct it.

[sanchi heuser]

The distance from the camera to the Café's entrance door door was ~20 feet.
It wasn't possible to get more distance. There was some space between parking cars
and I tried to place the camera more distant to the building, but I got the cars
on the left and right side into the frame.
I didn't see the dirtortion on the ground glass.

For the Photoshop CS I don't have the budget, only the student version would be
in reach. I don't think reading the LFPF doesn't really qualify me as official student:(

Could DxO Pro v6.0 be a suitable programme for such problems?
I saw there's a "standard" and an "elite" version of it.
The standard version is available for less than 100€ on amazon.

If that problem occurs not too often it's eventually cheaper to go to a service center (e.g. www.hsldigital.de) for graphics and let them do it.

Andi

[mortensen]

DxO won't do anything, LR3 doesn't. As Kirk described earlier, it assumes you're on axis.
CS5 is widely available as a 'free, full evaluation copy' on the web ;) .... but, it of course all depends on your software ethics

thanks for elaborating, Kirk - I thought a symmetrical design by default was distortion free, but I was wrong :)

[Marko]

CS5 is widely available as a 'free, full evaluation copy' on the web ;) .... but, it of course all depends on your software ethics

So are a lot of excellent photographs...

The difference is, CS5 will stop functioning after 30 days if not activated with a purchased key and the photographs will not. ;)

Of course, there are ways around it, it all depends on your ethics and computer proficiency level, but if you get caught with either, you *will* get sued and you *will* lose your house or worse. They will leave your in-laws alone, though. :D

[sanchi heuser]

DxO won't do anything, LR3 doesn't. As Kirk described earlier, it assumes you're on axis.
CS5 is widely available as a 'free, full evaluation copy' on the web ;) .... but, it of course all depends on your software ethics

thanks for elaborating, Kirk - I thought a symmetrical design by default was distortion free, but I was wrong :)

Mortensen
thanks a lot. I understand.
I'm a step further now as I know which programme I need.
Thanks to all that helped me here.

Andi