[meteorite-list] Photographing Ghubara?

From: martinh_at_isu.edu <martinh_at_meteoritecentral.com>
Date: Fri Apr 15 09:29:56 2005
Message-ID: <101fc6fc7c9.fc7c9101fc6_at_isu.edu>

Hi All,

Regarding Tom's question:

First, I suggest center-weighted or spot metering. Then...

Digital: set the white balance while holding the camera close but not shadowing the surface of the slice. Then shoot at an EV+1.

Film: Overexpose by 1.5-2 F-stops.

The background makes little difference unless the specimen occupies a fraction of the overall image and metering is a problem, or if the only option is full automatic.

I prefer a white background since the artifacts of overexposing and lightening with Photoshop are hard to see since it all goes white anyway. Other colors can do odd things when lightened.

Cheers,

Martin



----- Original Message -----
From: Dave <dave28_at_iol.it>
Date: Friday, April 15, 2005 0:53 am
Subject: Re: [meteorite-list] Photographing Ghubara?

> At 20.45 14/04/2005 -0700, you wrote:
>
> >Hello List, I am having trouble taking photos of Ghubara with it's
> black>matrix and all. I can't seem to get any detail. Any hints? I
> have two small,
>
>beautiful end cuts and a slice I want to list on ebay, but it is
> hard to do
> >with out photos!
>
> I would suggest using a dark background. It will allow the camera to
> overexpose the dark matrix and to take a better picture.
> I used it for my sikhotes and it worked very well.
>
> bye,
>
> Davide Bolsi
> I.M.C.A. #1449
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Received on Fri 15 Apr 2005 09:29:54 AM PDT