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Forum: Pentax SLR Lens Discussion 10-15-2017, 04:03 AM  
200mm prime + TC, vs budget 300mm zoom?
Posted By Bophoto
Replies: 5
Views: 1,156
One thing to keep in mind is that telephoto lenses have shorter focal length than stated.
For example, the DA300 is 278mm and a 1.4X TC may be 1.35X or 1.43X, but probably not 1.40X.
An A200 + 1.4 TC = 280mm, but in reality it might only be 190 X 1.35 = 257mm.
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