Iliah Borg

Iliah Borg

Lives in United States AK, United States
Has a website at http://www.libraw.org/
Joined on Nov 11, 2002

Comments

Total: 13, showing: 1 – 13
On Get more accurate color with camera calibration article (206 comments in total)
In reply to:

Mikael Risedal: why cant that be true?
raw is raw and as long their are no clipping in any channel you can do the WB later on against for example white or grey surface which is done anyway

and again there are other solutions than adobes, like www.qpcard.com which is easier, cheaper, faster and better

Dear Mikael,

First, it depends on the balancing algorithm, some will cause clipping where raw data is not clipped.

Second, the starting point for the exposure when one shoots for calibration and profiling is what incident exposure meter tells, and that is far from clipping. One can bracket from there up and compare results - preferably, using numbers, and not eyeballing; as we are talking calibration and profiling here.

Third, close to clipping point is where one can easily run into non-linearities, and skew the profile.

I have a QPCard and see no magic in it. It glares under the daylight, it is not durable in the field, and I do not see it providing better accuracy. I wonder how it is easier. Speed is irrelevant. Price is not significantly lower; replacing it twice as often as Passport eats out any savings.

If you wish I can collect some QPCards and measure them to see if the manufacturing tolerances and aging affect accuracy. It is easy with a spectrophotometer ;)

Direct link | Posted on May 8, 2014 at 13:51 UTC
On Get more accurate color with camera calibration article (206 comments in total)
In reply to:

john Clinch: Do different cameras of the same make and model see color differently. If they do why? I've never heard of sample variation between cameras AF fine tune aside

6% difference easy. No 2 sensor batches are exactly the same.

Direct link | Posted on Apr 28, 2014 at 17:08 UTC
On Get more accurate color with camera calibration article (206 comments in total)

Steve, the following needs a complete revision:
"As I am capturing raw files, I will have the camera set to the AdobeRGB color space and not sRGB, which is better suited to JPEG shooting. AdobeRGB gives a wider color gamut, and is the best option for raw images that will subsequently be edited on a computer. You should use the same color space for both the calibration shot and subsequent images which will use the same profile."

The colour space setting in the camera does not affect raw data.

Direct link | Posted on Apr 28, 2014 at 16:21 UTC as 47th comment | 2 replies
On Exposing another side of Sochi article (178 comments in total)
In reply to:

Kuturgan: Why not to show todays Sochi? It is not the same city as it was 5 years ago.

Here is todays
http://www.youtube.com/watch?feature=player_embedded&v=z574CEtM6LY

Direct link | Posted on Feb 19, 2014 at 15:58 UTC
On Exposing another side of Sochi article (178 comments in total)

More on Sochi http://nashe-nasledie.livejournal.com/1508962.html

Direct link | Posted on Feb 19, 2014 at 14:38 UTC as 43rd comment
On Sony Alpha A7 / A7R preview (2372 comments in total)

A7r image at taken at 25600 ISO is exposed nearly half a stop hotter compared to D800 image.

Direct link | Posted on Nov 15, 2013 at 12:50 UTC as 196th comment
On In Photos: Olympic torch to make first-ever spacewalk article (117 comments in total)
In reply to:

Waimak Stud: Um... Priorities? A country that doesn't yet want people to have equal freedoms under the law wants to send an Olympic torch into space? That doesn't make you look great, it kinda just makes you look like d1cks.

This one was terrible killing 72 people http://en.wikipedia.org/wiki/Nedelin_catastrophe

Direct link | Posted on Nov 11, 2013 at 17:20 UTC
On In Photos: Olympic torch to make first-ever spacewalk article (117 comments in total)
In reply to:

Slava123: An utterly pointless waste of money. This is what separates us from the animals. It's beautiful.

http://ria.ru/space/20131110/975771873.html

Direct link | Posted on Nov 10, 2013 at 01:11 UTC
On In Photos: Olympic torch to make first-ever spacewalk article (117 comments in total)

Is it a stylized pole axe on the photo #2?

Direct link | Posted on Nov 8, 2013 at 15:06 UTC as 19th comment | 1 reply

One category is missing - shots made with self-made digital cameras.

Direct link | Posted on Nov 1, 2013 at 14:29 UTC as 21st comment | 1 reply
On Buyer's Guide: 10 Essential Color Management Devices article (57 comments in total)
In reply to:

BJN: Getting a "neutral" white balance is important if you're shooting products or artwork and need the color rendition to be true to a particular daylight color balance. But for the vast majority of images, you don't want to neutralize color to render a neutral gray. Warm or cold ambient lighting is often what makes an image work. Most photographers shouldn't bother with color targets and white balance lens caps. They're specialty tools and if you don't know that you need them for you probably don't need them at all.

Yes and no. Most of raw converters use colour profiles that assume neutral white balance; and often it is better to start with a neutral image and add the feel of light at a later stage, in a controllable manner.

Direct link | Posted on Dec 5, 2011 at 03:31 UTC
On Buyer's Guide: 10 Essential Color Management Devices article (57 comments in total)

IMHO Mr. Sharma's book together with Mr. Rodney's "Color Management for Photographers: Hands on Techniques for Photoshop Users" deserve the first place; while ColorThink Pro should be the second most important tool, as some profile analysis, quality control, and comparison are very obviously needed. BabelColor and basICColor are very worth a special mention.

Direct link | Posted on Dec 4, 2011 at 15:54 UTC as 9th comment
On Buyer's Guide: 10 Essential Color Management Devices article (57 comments in total)
In reply to:

Matthew Miller: A new alternative for the adventurous, especially for those of you who value openness: http://www.hughski.com/

Based on TCS3200?

Direct link | Posted on Dec 4, 2011 at 14:36 UTC
Total: 13, showing: 1 – 13