G'day Derby.
The Sigma DC 18-125 f:3.5-5.6
Reports to be a Pentax F 28-80 f:3.5-4.5 on the Ds.

Hooroo.
Regards, Trevor.
Grafton 

-----Original Message-----
From: Derby Chang [mailto:[EMAIL PROTECTED] 
Sent: Saturday, 25 March 2006 10:28 AM
To: Pentax Discuss
Subject: EXIF lens names


I've been meaning to do this for a little while. Was a bit rainy last 
night, and since it has come up again recently on the list, I went 
through my collection of A and AF lenses to see what is actually 
recorded in the EXIF lens tag.

* The Pentax F, FA and DA lenses are all reported accurately as you 
would expect
* The 1.7x adapter doesn't report anything, also, as I guess, you would 
expect
* Sigma lenses are read incorrectly most of the time (the 20mm/1.8 is 
correct)
* I don't have too many Tamron or Tokina lenses, but they aren't read 
correctly. Interesting

http://members.iinet.net.au/~derbyc/temp/exif_lens.html

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