[ATM] How dark is dark?

[Jack Swaton @ Starry Host]

So are we recommending a glossy OTA interior? I'm building a wooden OTA and
the interior is very rough. What say you...matte or glossy? 

Jack

-----Original Message-----
From: atm-bounces at atmlist.net [mailto:atm-bounces at atmlist.net] On Behalf Of
hermit
Sent: Sunday, September 24, 2006 5:47 PM
To: ATM List
Subject: [ATM] How dark is dark?


Well, want to bring up another old discussion?  I have been getting back
into black and white photography recently.  I picked a densitometer to help
calibrate the process.  Given the same emulsion, a matte  black surface will
read about 1.7 while a glossy black surface will read 2.0. 
This is a log scale.  Every .15 is half a stop so this is a big
difference.   A full stop represents a 'halving' of the light. 
Basically this says a glossy surface will  appear much darker to the 
eye.  Well to the densitometer too. ;)  The densitometer is a sensor with a
little 'ring light' around it so in both cases you are measuring reflected
light.  Since we don't see the reflection with the matte surface do we just
'think' it is better for baffling?

Ken
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