08-23-2016, 10:23 AM
(This post was last modified: 08-23-2016, 10:25 AM by Brightcolours.)
Quote:2) It was Klaus that set F4 in APS-C equivalent to F5.6 in FF terms, not me. The reason I picked the 80/100-400 was because that would fit with the APS-C lens selected and as there ias no 50-200 F4 in APS-C I would rather go for either longer as I did or shorter as I did in 3)2) The 70-200mm f4 FF lenses are a much better match for the comparison, for APS-C, though.
3) again, it was Klaus who set 2.8 APS-C equivalent to F4 in FF. It was also him who picked Pentax lenses as a representative for APS-C lenses. W.r.t. the Canon EF 70-200mm f4 L USM, that's the old obsolete lens w/o IS. The current model weighs 760 g and I think it's fair to compare current lenses.
3) The Canon EF 70-200mm f4 L USM is not obsolete, not in performance and not in the price lists. It is still a current model. The Pentax does not have IS either, so lens wise it is a fine comparison. The Pentax got sold as Tokina for a while, but thatone is indeed obsolete.
It really makes a bit more sense to use a 70-200mm f4 lens for that part of the comparison. One can choose Nikon, Sony, Canon.