Re: [Gimp-user] GTK+ print or gutenprint?

2008-03-18 Thread Sven Neumann
Hi, On Mon, 2008-03-17 at 07:36 -0400, Geoffrey wrote: I'm curious as to which would be the preferred print functionality? I've noticed both options but can't really tell much difference in the quality of the output. The GTK+ print system doesn't deal with driving the printers, it is only a

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread norman
Thank you very much for trying to help me sort out the problem. It looks very much as though any procedure would be both complex and time consuming without any guarantee of success. Therefore, I believe what I should do is concentrate on photographic techniques with a view to minimising the

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread Patrick Shanahan
* norman [EMAIL PROTECTED] [03-18-08 09:46]: Therefore, I believe what I should do is concentrate on photographic techniques with a view to minimising the chromatic aberration as much as possible. Any advice in this direction would be very welcome. Unfortunately, ca is controlled in lense

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread norman
snip Unfortunately, ca is controlled in lense manufacture and design and has two solutions, software or better glass. Minimizing ca via technique would severly limit your scope, imo. I would expect most lenses these days to be made such that they do not cause CA. From what I have read,

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread Simon Roberts
- Original Message From: norman [EMAIL PROTECTED] To: gimp-user@lists.XCF.Berkeley.EDU Sent: Tuesday, March 18, 2008 8:52:22 AM Subject: Re: [Gimp-user] chromatic aberration snip Unfortunately, ca is controlled in lense manufacture and design and has two solutions, software or

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread norman
On Tue, 2008-03-18 at 08:13 -0700, Simon Roberts wrote: - Original Message From: norman [EMAIL PROTECTED] To: gimp-user@lists.XCF.Berkeley.EDU Sent: Tuesday, March 18, 2008 8:52:22 AM Subject: Re: [Gimp-user] chromatic aberration snip Unfortunately, ca is controlled in

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread Bruno Postle
On Tue 18-Mar-2008 at 08:13 -0700, Simon Roberts wrote: Software can certainly help with this, and that other product has this built in. Then again, you can buy a couple of really nice lenses for the price you'll pay for that product ; Not an immediate solution, but 'over at the hugin project'

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread norman
On Tue, 2008-03-18 at 15:46 +, Bruno Postle wrote: On Tue 18-Mar-2008 at 08:13 -0700, Simon Roberts wrote: Software can certainly help with this, and that other product has this built in. Then again, you can buy a couple of really nice lenses for the price you'll pay for that product

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread Simon Roberts
- Original Message From: norman [EMAIL PROTECTED] ... CA is indeed a function of the lens quality. You're also right that a smaller sensor makes CA more visible, that's just simple geometry. If the lens produces an abberation of any given size, then if the sensor is half the size,

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread Rolf Steinort
On Tue, 2008-03-18 at 16:23 +, norman wrote: On Tue, 2008-03-18 at 15:46 +, Bruno Postle wrote: On Tue 18-Mar-2008 at 08:13 -0700, Simon Roberts wrote: Software can certainly help with this, and that other product has this built in. Then again, you can buy a couple of really

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread Rolf Steinort
On Tue, 2008-03-18 at 15:33 +, norman wrote: I feel sure that you must be correct. I have never seen any noticeable fringing or CA effects with my ordinary photography it is only with this project I set myself of copying a lot of old colour transparencies. In the old days I used to often

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread norman
- snip Are you copying the slides, or are you scanning them? If you're using a slide copying attachment and effectively rephotographing them onto your digital camera, then the CA of the copying equipment will be a

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread Rolf Steinort
On Tue, 2008-03-18 at 16:23 +, norman wrote: On Tue, 2008-03-18 at 15:46 +, Bruno Postle wrote: On Tue 18-Mar-2008 at 08:13 -0700, Simon Roberts wrote: Software can certainly help with this, and that other product has this built in. Then again, you can buy a couple of really

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread Bruno Postle
On Tue 18-Mar-2008 at 16:23 +, norman wrote: http://wiki.panotools.org/SoC_2008_ideas#tCA_Correction This seems to assume that the optics are the cause of the CA whereas I understand that CA is also caused by the chip in e digital camera. Will this process take care of that? Nope. --

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread Patrick Shanahan
* norman [EMAIL PROTECTED] [03-18-08 10:53]: snip Unfortunately, ca is controlled in lense manufacture and design and has two solutions, software or better glass. Minimizing ca via technique would severly limit your scope, imo. I would expect most lenses these days to be made such

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread bgw
Simon Roberts wrote: snip See Ken Rockwell's comments on it's not the camera at http://www.kenrockwell.com/tech/notcamera.htm An excellent discussion, although Rockwell fails to mention Ansel Adams's darkroom artistry (see wikipedia on Ansel Adams and the associated reference 18).

Re: [Gimp-user] chromatic aberration

2008-03-18 Thread David Hodson
norman wrote: I have been copying some old colour transparencies using my digital camera and most of the images produced suffer from chromatic aberration somewhere within them. I have tried to find some procedure to remove these blemishes but, so far, have not found anything I can get to work.