This Pentax lens has a 0.13 magnification ratio. For those who like to use a filter, this lens has a filter diameter of 77 mm.
From Amazon
HD PENTAX-D FA* 70-200mmF2.8ED DC AW Telephoto zoom lens for Digital SLR cameras State-of-the art optical technology High-resolution images Free of flare and ghost images All Weather construction
Harrison Cameras
Pentax 70-200mm F2.8 D FA ED DC AW Lens
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