Re: [APML] CRT vs Flat Panel for display of astrophotos

["Robert Gendler" <robgendler@worldnet.att.net>]

>From what I understand contrast ratio is a nebulous term since
it's measured differently by each manufacturer. The problem with
the LCD's is the dynamic range. LCD's have a difficult time rendering
true blacks (which is important in astroimages). I actually have a high end
LCD (22" viewsonic  211B) and a CRT (22" viewsonic P225f). The CRT
produces a better image in terms of color, contrast, noise, and sharpness.
Some images do look better on the LCD for some reason but overall the CRT
outperforms it. I like to use both monitors to process an image since the
brightness
of the LCD will make any flaws in the image more apparent.

Rob Gendler
email: robgendler@att.net
Web Site: http://www.robgendlerastropics.com
----- Original Message ----- 
From: "Serge Theberge" <serge.theberge@wti.on.ca>
To: "'Discussion of Film Astrophotography'" <astro-photo@seds.org>
Sent: Monday, April 05, 2004 2:45 PM
Subject: RE: [APML] CRT vs Flat Panel for display of astrophotos


Alan,

This is puzzling me too.  I did some search on the web about the value of
contrast ratio, and it doesn't seem to be a comparison point "holy grail".

See for instance
http://www6.tomshardware.com/display/20040226/contrast_ratio-01.html

Serge

-----Original Message-----
From: astro-photo-bounces@seds.org [mailto:astro-photo-bounces@seds.org] On
Behalf Of Alan Voetsch
Sent: Monday, April 05, 2004 1:44 PM
To: Discussion of Film Astrophotography
Subject: RE: [APML] CRT vs Flat Panel for display of astrophotos


--- Serge Theberge <serge.theberge@wti.on.ca> wrote:
> Your memory is good, the Dell Ultrasharp 20" LCD panel has a contrast
> ratio of 400:1 according to their web site.

I've never heard "contrast ratio" used as a term of reference, or comparison
before. Is it a valid comparison point? And if so, what would the
recommended range be?

Thanks,
Alan


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