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[OM] Re: Conspiracy Theorists Needed (on topic)

Subject: [OM] Re: Conspiracy Theorists Needed (on topic)
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxx>
Date: Wed, 19 Oct 2005 14:22:17 -0400

Andrew Dacey wrote:

> On 10/19/05, Piers Hemy <piers@xxxxxxxx> wrote:
> 
>>I can't see anything to comment on in the A200 pics, Boris, sorry.
>>
>>As for the OM pics - why surely the scanner you used was making some
>>exposure calculation for itself?  Is that not where the "exposure variation"
>>arises?  More specifically, the leftmost frame would have been the most
>>dense, which the scanner would have overexposed to get back to something
>>like 18% gray on average.  Or so it seems to me.
> 
> 
> Good call with that, I was thinking in camera exposure in my
> suggestion but scanner exposure could explain it too. I know with
> Vuescan you can lock the exposure and keep it from adjusting for each
> scan, very handy for this type of thing.
----------------------------------------------

I agree.  When doing panos don't do auto anything.  The slightest color 
or exposure variation will be very noticable.  Don't use polarizers 
either.  The effect varies with angle from the sun and each exposure 
will be different.

Chuck Norcutt


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