new Canon EF 400mm f/4 DO IS USM II - Printable Version +- Opticallimits (https://forum.opticallimits.com) +-- Forum: Forums (https://forum.opticallimits.com/forumdisplay.php?fid=4) +--- Forum: Canon EOS (https://forum.opticallimits.com/forumdisplay.php?fid=11) +--- Thread: new Canon EF 400mm f/4 DO IS USM II (/showthread.php?tid=1386) |
new Canon EF 400mm f/4 DO IS USM II - Klaus - 09-15-2014 Outstanding MTFs it seems: http://www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_400mm_f_4_do_is_ii_usm new Canon EF 400mm f/4 DO IS USM II - Brightcolours - 09-15-2014 Yeah, that looks like an awesome lens. For an unreachable price. It gained a little weight compared to the 1st iteration: 2.1 kg vs. 1.9 kg for the old 400mm f4 DO. Must be a heavy extra element (17 elements in 13 groups for the old lens, 18 elements in 12 groups for the new design). No lens construction diagram for the new version available yet. new Canon EF 400mm f/4 DO IS USM II - Rover - 09-16-2014 The price makes me want to Seriously, this is nuts. new Canon EF 400mm f/4 DO IS USM II - Brightcolours - 09-16-2014 This explains the extra weight: 400mm f4 DO: Orange = DO element 400mm f4 DO II: Yellow = DO element Dark green = UD element Light green = ground aspherical element Overall, the amount of glass has increased. About the price, yes it is very high. But the big ground aspherical element and the double glued DO element have very high production costs, though. |