Luminance Too High on iMac Dispaly for Serious Work (200 cd/m2)

Hi Folks,

I have a GretagMacbeth Eye-One that I use to manage my new iMac 24" monitor and profile my Epson Stylus Pro 3800. Everything works well except for the luminance of my monitor. The luminance is always 200 candles per meter squared instead of a normal target of 120 cd/m2. I have adjusted my brightness setting as low as it will go in Systems Preferences.

Like many people, I am using Canon RAW files with Aperture 2.1 and it is very difficult to match the monitor to the prints (I waste a ton of money on expensive paper and ink). I also have Photoshop CS3 and I have the same soft proofing issues, that is, the prints come out darker than the monitor displays.

I also have a high end Toshiba laptop that is running Windows XP and I do not have the same issue because I can control many aspects of the monitor (i.e., RGB channels, brightness, contrast, et al). So I am confident that I know how to use the GretagMacbeth Eye-One system.

I suspect that Apple didn't think that people would buy iMacs for serious photography and printing. This is my first purchase of a Macintosh and I really hope that Apple addresses this iMac issue of not having any control of the monitor hardware, because quite frankly, I will have to revert to my XP system and Lightroom and CS3. God forbid that I eventually upgrade to crappy Vista, a true Windows ME in the making!!!

I hope that someone can show me the underlaying UNIX system to adjust monitor luminance. Hey, I have a better idea, how about if Apple started working on an Aperture update for us iMac owners to help in soft proofing?

Thanks Folks,

I still believe in "Think Macintosh, Think Different."

Tim

iMac, Mac OS X (10.5.2), GretagMacbeth Eye-One and Epson Stylus Pro 3800

Posted on May 3, 2008 9:56 PM

Reply
9 replies

May 4, 2008 10:35 AM in response to tgb412

Hi -You will get replies saying to try Dark Adapted or Shades software which you can try(it's freeware) but they will not help you really because although they let you lower the brightness you lose contrast and your whites will not be white. A previous post suggested another software calibration tool called Color Eyes. Problem is it costs more $$ but allows more flexibility. The real fix is to use a second high end monitor if you are in need of this precision.

May 4, 2008 2:25 PM in response to pete mark

The brightness is so high on these machines in order to overcome the glare and reflections from the glossy glass panel. One of the side-effects of this is that the headaches caused by the intense brightness makes the iMac unusable for some people. The glossy iMacs are best suited for watching television and playing games. Even this month's Macworld, on p. 64, indicates that if you need a Mac for video and photo work, you shouldn't go with a glossy screen.

May 4, 2008 7:15 PM in response to lakeshore

The brightness is so high on these machines in order to overcome the glare and reflections from the glossy glass panel. One of the side-effects of this is that the headaches caused by the intense brightness...


I also intend to buy a 24" iMac and read about that high brightness problem. Someone here recommended Shades ( http://www.charcoaldesign.co.uk/shades). I thought this would solve the problem. Or does anyone disagree...?

May 5, 2008 4:40 PM in response to coxorange

coxorange wrote:

Someone here recommended Shades ... I thought this would solve
the problem. Or does anyone disagree...?


Shades is effective at reducing brightness for casual reading,
web browsing, etc. -- but as *pete mark* already posted, it has
the side effect of clobbering display calibration/contrast.

Shades has no way to reduce the brightness of the backlight
(iMac hardware doesn't provide sufficient adjustment range).
Shades is just a (very clever) software trick that reduces
average brightness by clipping/compressing all video content
sent to the display. It's great for some purposes, but NOT
for color-critical work.

Looby

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Luminance Too High on iMac Dispaly for Serious Work (200 cd/m2)

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.