what macro lens is this?

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On a Nikon D80 (and also the D40, D50, D70, D200, I think), the sensor measures 23.6mm x 15.8 mm. It is referred to as a "1.5 crop" or 1.5x crop because it is 2/3 the size of a 35mm frame of film. That is why a Nikon 60mm DX (digital) lense is equivalent to a 90mm (60mm x 1.5) lense on a traditional film dSLR.

David
 
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https://www.shearwater.com/products/teric/

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