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03-26-2008, 08:41 PM   #1
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Focal Length from EXIF

Just an observation, not an issue.

I was looking at the EXIF data from a photo I just did with my new M 135 and under Focal length equals 200mm and Focal Length in 35mm equals 300mm. ...incorrect, it should state 135mm and 200mm respectively.

For comparison I looked at the EXIF from photos taken with my M 85 and it read Focal length equals 85mm and Focal Length in 35mm equals 127mm ...this is correct. I also check the EXIF from my previous DA 18-250. It was correct.

I guess the M135 does not write the correct Focal Length in EXIF, at least on the K100D Super. Can anyone confirm this whether on the same body or a different Pentax?

03-27-2008, 01:10 AM   #2
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NO M-lens will transmit focal length data to the body. The focal length recorded is what you have told the body to use for the shake reduction to be able to work.
03-27-2008, 05:40 AM   #3
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QuoteOriginally posted by SupremeMoFo Quote
NO M-lens will transmit focal length data to the body. The focal length recorded is what you have told the body to use for the shake reduction to be able to work.
Thanks for that info, I won't have thoght of that. I remember now setting the SR at 200.
03-27-2008, 06:13 AM   #4
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QuoteOriginally posted by metalfab Quote
Thanks for that info, I won't have thoght of that. I remember now setting the SR at 200.
If your lens is 135mm, why do you set the SR to 200mm ?
The focal length you put in SR does not need to be multiplied by 1.5, if that is what you thought. SR needs the actual physical focal length. not 35mm equivalent.

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