Next OL lens test report - Canon RF 100-500mm f/4.5-7.1 USM L IS - 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: Next OL lens test report - Canon RF 100-500mm f/4.5-7.1 USM L IS (/showthread.php?tid=4959) |
Next OL lens test report - Canon RF 100-500mm f/4.5-7.1 USM L IS - Klaus - 12-10-2020 https://www.opticallimits.com/canon_eos_ff/1102-canonrf100500f4571 RE: Next OL lens test report - Canon RF 100-500mm f/4.5-7.1 USM L IS - davidmanze - 12-10-2020 (12-10-2020, 01:32 PM)Klaus Wrote: https://www.opticallimits.com/canon_eos_ff/1102-canonrf100500f4571 Nice comprehensive review ...... always a pity about F7.1 though ..... "nothing beats a long focal length but a longer one" nothing beats a long focal length better than a longer one !! "weather resistance" RE: Next OL lens test report - Canon RF 100-500mm f/4.5-7.1 USM L IS - Rover - 12-10-2020 Then again it was reported to fall to f/7.1 pretty late in the zoom range, certainly after 400mm. Lots of people probably started setting their cameras to 1/2 stop exposure steps because it reports f/5.6 at 400mm if set up this way (f/6.3 if set to 1/3 stop intervals). In reality it's prolly something like f/6.1 at 400mm, so not quite rounds down to f/6.7. That was pretty surprising though, since I used to expect it to turn f/7.1 at about 320~350mm tops. RE: Next OL lens test report - Canon RF 100-500mm f/4.5-7.1 USM L IS - Brightcolours - 12-10-2020 (12-10-2020, 08:03 PM)Rover Wrote: That was pretty surprising though, since I used to expect it to turn f/7.1 at about 320~350mm tops. Then they would have to construct the lens in a way that the aperture (size) enlarged from 320 to 500mm to stay at f7.1 (so a fixed max aperture (f-stop) over that whole range. That would be a bit odd.. RE: Next OL lens test report - Canon RF 100-500mm f/4.5-7.1 USM L IS - Rover - 12-10-2020 Don't most of the variable aperture zooms hit the smallest of the aperture range rather earlier than the max. focal length, like - say - the Sony 100-400mm f/4.5-5.6 GM becoming an f/5.6 lens by 162mm (as reported by Bryan of TDP in his review)? I know the Canon 100-400 II was a positive example though, only going to f/5.6 after 312mm, but it's a rare case. |