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Joey the Green-Cheeked Conure

 
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conurus
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Joined: 15 Aug 2006
Posts: 795
Location: Vancouver, Canada

PostPosted: Wed Aug 16, 2006 7:04 am    Post subject: Joey the Green-Cheeked Conure Reply with quote

Joey enjoys being preened


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EXIF Information  Details
Camera make  Canon Camera model  Canon EOS DIGITAL REBEL
ISO  400 Focal length  86mm
Shutter speed  1/40 seconds Aperture  f/8.0
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luposf



Joined: 17 Aug 2006
Posts: 21
Location: Italy

PostPosted: Thu Aug 17, 2006 2:21 pm    Post subject: Reply with quote

Which lens did You used for this?
Exif says 86mm, so is not the Zeiss Makro 100...

Luposf
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conurus
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Joined: 15 Aug 2006
Posts: 795
Location: Vancouver, Canada

PostPosted: Thu Aug 17, 2006 9:35 pm    Post subject: Reply with quote

I posted this just to test Minc's EXIF feature for the bulletin board, which I wish to take this opportunity to thank Minc for generously sharing with us.

The lens is VS24-85. You may wonder why the lens reports 86mm. One possible explanation is that "24" and "85" are just nominal focal lengths but not actual values, and Zeiss thinks the lens should report 86mm at the long end. In any event conurus firmware never tries to "police" or "correct" EXIF data reported by the lens, but always relay it faithfully to the camera body.

(I am moving this back to the Photography forum because this is getting technical in nature.)
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MomoInu



Joined: 15 Aug 2006
Posts: 68
Location: Santa Fe, NM

PostPosted: Thu Aug 24, 2006 12:22 pm    Post subject: Reply with quote

I get the same deviations from expected numbers in EXIF data from my Contax N Digital. For example if the lens is set to f5.6, the EXIF data shows F5.7. Why, I don't know. But since it happens with both the Canon and Contax bodies, it must be something with how the lens report aperture and focal length information to the body (but you probably know alot more about that than I).
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