Al is right on this one. The higher the F-stop number, the greater the depth of field is, i.e more of a three dimensional object will be in focus. The drawback to this is less light enters the lens thus requiring a longer shutter speed. And, if your not careful, a background that is too close can be in focus as well. There are many different ways to take good quality pictures of meteorites, experimentation is the key.

Best,

John Gwilliam

At 06:50 AM 1/27/2010, al mitt wrote:
Hi Erik and all,

I'd think just the opposite would be correct. A higher f-stop (f 22, 18 etc.) would create a better depth of field and the more open your iris is on your camera (lower f stop, 1.8, 2.0 etc.) the less focused your items would be. I think you just stated it backwards. Best!

--AL Mitterling
Mitterling Meteorites

----- Original Message ----- From: "Erik Fisler" <erikfw...@msn.com>
To: "meteorite-list" <meteorite-list@meteoritecentral.com>
Sent: Tuesday, January 26, 2010 3:51 PM
Subject: [meteorite-list] Meteorite Photography (Must read!)



The third thing is auto-blending. For those of you who have SLR's you will notice that shooting at a higher F-stop like F1.8 or F2.8 is a lot sharper than shooting at a lower F-stop like F22. The problem is, you might have to drop your F-stop to make sure the whole meteorite is in focus.

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Regards,

John Gwilliam

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and go through life thinking they hit a triple.
[Bob Dylan]
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