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setting temperature

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  #1  
Old 01-22-2012, 11:26 AM
pinkhorse pinkhorse is offline
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setting temperature

Greetings all,

Technical background info: D5000, NEF files, tone and color work done in LR. Macbook with an HP ZR 24w monitor. Spyder3Elite which I use religiously, including the ambient light monitor.

Problem: My prints (mpix and a local professional lab) are coming out dark. I emailed with (unfortunately, he wasn't there when I went in) the technical guy at my local lab and with mpix. I never got to a place of resolution with either of them and have some questions before I go back to them again.

I am working in 2.2 gamma, which I understand to be native to the computer but not necessarily to the monitor but also not necessarily the biggest issue in terms of the darkness problem. Using sRGB. I was calibrating the white balance to 6500K at the request of the Spyder. Both places seemed somewhat surprised at that and thought it should be more like 5000 or 5500K. So, for an order that needed to get out I did that, (can't remember which because I'm not in front of the monitor now but only one was available) lightened it up a bit in LR (if I remember correctly in the tone curve) - still looked a little bit bright to my eye on the monitor but printed ok. I didn't think, in my rush, to print one of each (the original done on the 6500 and the other).

So, what temperature is appropriate?

Also, what about adjusting the brightness for while I'm working. The spyder wants me to bring it way down for the calibration but I'm just unable to work at that level and remember reading (in my long search for which monitor and calibration device to buy) that it was ok to calibrate an then move to where you're comfortable working. Even tho that doesn't make a lot of sense to me. I've started not following the spyder's directions to bring it down but that doesn't seem to make a difference in the final product.

Sorry for rambling on so long. Truly appreciate any advice.
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Old 01-22-2012, 11:55 AM
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John Wheeler John Wheeler is offline
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Re: setting temperature

Hi Pinkhorse

The color temperature you want and the brightness of the monitor for calibration (and editing) should be the same as the environment in which you will view the prints.

The lower color temperatures were often base on the fact that much of the lighting in this world for viewing prints was tungsten with that color temperature. These days there is a bigger variety including a lot of viewing that is just on the screen (no prints) and prints viewed in office environments with more fluorescent/CFL/LED lighting set to a higher temperature.

As far as monitor brightness. Guidelines for calibration/editing are often in the 100 to 150 cd/m^2 range.

Here is what happens if you have your monitor set quite bright (lets say 400 cd/d^2. You make adjustments for the black areas of the image until it gives a good black impression to you. You make a print and go view it in a 100 cd^m2 room lighting. Guess what, it will look 2 stops underexposed because you are viewing the print with 2 stops less of illumination than the environment with which it was created.

Here is a link to an article on the topic by Andrew Rodney that may "enlighten" you

http://www.luminous-landscape.com/tutorials/why_are_my_prints_too_dark.shtml

All IMHO of course. Hope this is useful.
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Old 01-22-2012, 12:27 PM
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andrewrodney andrewrodney is offline
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Re: setting temperature

Quote:
Originally Posted by pinkhorse View Post
So, what temperature is appropriate?
The one that produces a match to your prints when prints are properly viewed. See

http://www.luminous-landscape.com/tu...too_dark.shtml
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Old 03-12-2017, 10:45 AM
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shift studio shift studio is offline
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Re: setting temperature

Quote:
Originally Posted by andrewrodney View Post
The one that produces a match to your prints when prints are properly viewed. See

http://www.luminous-landscape.com/tu...too_dark.shtml
Can you post a new link to the article?
Thanks!
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Old 03-12-2017, 10:51 AM
John Wheeler's Avatar
John Wheeler John Wheeler is offline
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Re: setting temperature

Apparently the link is broken right now (may come back) yet here is a cached version that should work: http://webcache.googleusercontent.co...&ct=clnk&gl=us
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Old 03-12-2017, 11:05 AM
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Tony W Tony W is offline
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Re: setting temperature

A video update of the article may be of interest

Why are my prints too dark? Dec 2015
https://www.youtube.com/watch?v=iS6sjZmxjY4
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Old 03-12-2017, 01:49 PM
klev klev is offline
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Re: setting temperature

Those places are very silly. Your calibration process is just rewriting a display profile, so deviating significantly from the monitor's native output will make things look terrible on your screen. You're also working in sRGB, which uses an illuminant that is close to 6500k at its maximum value.

Your real issue is that your monitor is set too bright. Prepress operations often use very bright viewing booths with very little additional ambient light. The ideal temperature of the display is then the closest target to the temperature of that light source. The brightness should match the print when viewed under one of those sources, and they will typically suggest something like 160 cd/m^2.

For general use, this does not match your viewing conditions. If you don't have this kind of controlled setup, you're likely to get a better match with your display set to 85-100 cd/m^2. The actual value should be based on a consistent viewing environment and match your print. It's not as exact doing it this way, but the results should be fine. It will certainly not deviate greatly from your expectations at that point.
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Old 03-13-2017, 09:15 PM
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shift studio shift studio is offline
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Re: setting temperature

Thanks John, Tony, Klev and Andrew. Good info. I've been evaluating the colour temp and luminance of my workspace lighting.
I appreciate the links and insights!
--shift studio.
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Old 03-14-2017, 09:54 AM
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andrewrodney andrewrodney is offline
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Re: setting temperature

Quote:
Originally Posted by andrewrodney View Post
The one that produces a match to your prints when prints are properly viewed. See

http://www.luminous-landscape.com/tu...too_dark.shtml
Why are my prints too dark?
A video update to a written piece on subject from 2013

In this 24 minute video, I'll cover:

Are your prints really too dark?
Display calibration and WYSIWYG
Proper print viewing conditions
Trouble shooting to get a match
Avoiding kludges that don't solve the problem

High resolution: http://digitaldog.net/files/Why_are_...s_too_dark.mp4
Low resolution: https://youtu.be/iS6sjZmxjY4
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  #10  
Old 03-15-2017, 11:58 PM
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shift studio shift studio is offline
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Re: setting temperature

Sorry for hijacking this thread but ... regarding positioning of overhead lighting, what are everyone's (anyone's) thoughts for the best workspace setup?
A light ceiling light behind user a metre or more, a light directly above the display or a light behind the display a metre or more.
I actually don't have a choice, but am curious about the answer and why.
Thanks in advance.
--Shift Studio.
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