11-02-2012, 01:06 PM
[quote name='Brightcolours' timestamp='1351076975' post='20698']
The new Nikon AF-S 70-200mm f4 VR is a nice addition to the range, and seems to lack the large focus breathing its more expensive brother, the AF-S 70-200mm f2.8 VR II, shows.
The f2.8 VR II has an unimpressive 0.12 max. magnification according to Nikon specs, at an MFD of 1.4 meters.
The new f4 has a nice 0.275 max. mag. according to the Nikon specs, at given MFD of 1 meter.
That is pretty close in focus breathing terms to my EF 70-200mm f4 L USM, which gets a 0.21 at 1.2 meters MFD and 0.29 at 1 meter MFD with 12mm extension tube.
Indeed, it looks to be a nice addition to the Nikon range!
[/quote]
[quote name='nandadevieast' timestamp='1351798420' post='20778']
BC, this design has focus breathing...
[/quote]
[quote name='Brightcolours' timestamp='1351800278' post='20779']
Explain what you mean.
[/quote]
I did a few calculations, and a magnification factor of 0.21 at 1.2 m (Canon EF 70-200 F/4L USM) means the actual FL is about 172 mm, a fair amount of focus breathing at 200 mm IOW, although certainly not as bad as the Nikkor 70-200 F/2.8 VR II (135mm for a magnfication of 0.12 at 1.4 m). The new Nikkor 70-200 F/4 VR, with a magnification of 0.275 at 1.0 m has an actual FL at that distance of 169 mm, IOW, very similar to the Canon.
Very similar IOW other than the extra 0.2 m of closer focus, but yes, this design still has focus breathing. Considering the way a zooming mechanism is implemented, this is to be expected in all but the most expensive lenses designed very specifically to deal with focus breathing. Think of lenses costing 10X as much as the photographic lenses we are talking about here, and more. These are generally made for the video and film industry, however, rather than for shooting stills. BTW, the same is true for IF lenses - they essentially use a zoom type design to achieve internal focusing, and zoom lenses with IF essentially make corrections for focus breathing even more difficult.
Kind regards, Wim
The new Nikon AF-S 70-200mm f4 VR is a nice addition to the range, and seems to lack the large focus breathing its more expensive brother, the AF-S 70-200mm f2.8 VR II, shows.
The f2.8 VR II has an unimpressive 0.12 max. magnification according to Nikon specs, at an MFD of 1.4 meters.
The new f4 has a nice 0.275 max. mag. according to the Nikon specs, at given MFD of 1 meter.
That is pretty close in focus breathing terms to my EF 70-200mm f4 L USM, which gets a 0.21 at 1.2 meters MFD and 0.29 at 1 meter MFD with 12mm extension tube.
Indeed, it looks to be a nice addition to the Nikon range!
[/quote]
[quote name='nandadevieast' timestamp='1351798420' post='20778']
BC, this design has focus breathing...
[/quote]
[quote name='Brightcolours' timestamp='1351800278' post='20779']
Explain what you mean.
[/quote]
I did a few calculations, and a magnification factor of 0.21 at 1.2 m (Canon EF 70-200 F/4L USM) means the actual FL is about 172 mm, a fair amount of focus breathing at 200 mm IOW, although certainly not as bad as the Nikkor 70-200 F/2.8 VR II (135mm for a magnfication of 0.12 at 1.4 m). The new Nikkor 70-200 F/4 VR, with a magnification of 0.275 at 1.0 m has an actual FL at that distance of 169 mm, IOW, very similar to the Canon.
Very similar IOW other than the extra 0.2 m of closer focus, but yes, this design still has focus breathing. Considering the way a zooming mechanism is implemented, this is to be expected in all but the most expensive lenses designed very specifically to deal with focus breathing. Think of lenses costing 10X as much as the photographic lenses we are talking about here, and more. These are generally made for the video and film industry, however, rather than for shooting stills. BTW, the same is true for IF lenses - they essentially use a zoom type design to achieve internal focusing, and zoom lenses with IF essentially make corrections for focus breathing even more difficult.
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....