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 Post subject: Tamron 10-24 for Nikon
PostPosted: Wed Sep 03, 2008 5:38 pm 
Am i reading this right? How does the lens change the conversion focal length of the lens?

Tamron SP AF10-24mm Di II specifications

*1 Di (Digitally integrated design)-II lenses are designed for exclusive use on digital cameras with APS-C sized smaller image sensors. Di II lenses are not designed for use with 35mm film cameras and digital SLRs with image sensors larger than 24mmx16mm.

*2 Tamron's conversion value is 1.55x

*3 As of August 2008, according to Tamron’s research of ultra wide-angle zoom lenses designed for exclusive use on digital SLR cameras.

Covers the Broadest Range Ever-from 10mm Ultra Wide-angle to 24mm-in Its Class.
The new Tamron ultra wide-angle zoom lens covers the 35mm full-size format equivalent of 16-37mm, for the first time in this class of zoom lenses . This focal length range-10mm ultra wide-angle to 24mm semi wide-angle-enables the user to enjoy hassle-free wide-angle photography.


 Post subject:
PostPosted: Fri Sep 05, 2008 4:51 pm 

Joined: Fri Sep 05, 2008 4:42 pm
Posts: 1388
Location: The Netherlands
Tamron has used 1,55x as an example. Nikon camera's would have a multiplier of 1,5x on the focal lenghth where a Canon sensor would give 1,6x the focal length. So on nikon camera's you'd get a 15-36mm lens instead of the canon's 16-38. I think Tamron has chosen the 1,55 as an average of these two types of sensor.


(btw, this post is in the wrong forum, but that's not my job to change :-P)

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