Nikkor 85/2
Inviato: gio feb 26, 2009 12:42 pm
Questo è quello che dice Bjørn Rørslett sull'ottica in questione:
The replacement for the venerable f/1.8 lens was much smaller and very compact, but unfortunately the optical quality is nowhere in the league of its predecessor. In particular I found pictures taken with the 85/2 to be dull and life-less, and images took on a greyish cast as well. I'm aware of reports claiming this lens is an excellent perfomer and am at a loss to explain this discrepancy in opinions (I've tried several 85/2's and they all behaved in a similar manner).
Questo invece è il pensiero di Ken Rockwell, specifiche tecniche a parte:
This is a magnificent lens. It's sharp, compact, fast and extremely well made. I personally prefer the 85mm focal length over other lenses; it's just the way I usually see the world.
Specifications
It has five elements in five groups.
It has a seven-bladed diaphragm stopping down to f/22.
It focusses down to 0.85m or 2.8,' which gets you to about the same reproduction ratio as most other Nikkor manual focus lenses.
It takes 52mm filters.
It is 2.5" (64mm) around by 2.4" (61mm) long and weighs 11 oz (310 g).
It takes an HS-10 hood. I've never bothered with it, and heck, you can use any ordinary rubber hood from a normal lens, too.
Performance
This is a very good lens. I see no lateral color. On the bench it has a tad of axial chromatic aberration not seen on film.
It is very sharp. Here's the lowdown by aperture:
f/2.0: Sharp and contrasty all over; the best performance I've seen with any lens at f/2. There is minimal falloff. At 22x there is just a little bit less sharpness wide open than at smaller apertures, and a little bit of softness in the corners compared to smaller apertures. This is outstanding performance.
f/2.8: Looks great! At 22x it's still a tiny bit less sharp than other apertures, but still outstanding.
f/4: Still outstanding and improving both center and corners
f/5.6 - f/8: These are the optimum apertures in the center of the image.
f/8 - f/11: These are the optimum apertures for the corners of the image.
f/16 - f/22: Some random underexposure with FA camera in auto modes, hold the aperture preview button down while releasing the shutter (or starting selftimer) and this goes away.
It has few ghosts or flare issues on film, even though I can see a large blue blob on the opposite side of the image through the viewfinder when pointed directly at the bright sun. This is stupid; I'm surprised I didn't melt the matte plastic viewfinder screen. There is a point sized ghost on the opposite side of the image at apertures larger than f/8.
There is no distortion.
Ora io mi chiedo quale sia la verità, possibile che Nikon dopo il mitico 85/1.8 abbia potuto produrre un'ottica cosÌ scarsa come sostiene il buon Bjørn?
L'ottica rispetto al predecessore è meno luminosa di 1/3 di stop ma soprattutto è più leggera e compatta.
Avete esperienze in merito, visto che come ottica da viaggio è particolarmente vantaggiosa?
Ricordo che la usava Massimo e forse anche il Bartoli ricorda qualcosa.
Ciao
Luca
The replacement for the venerable f/1.8 lens was much smaller and very compact, but unfortunately the optical quality is nowhere in the league of its predecessor. In particular I found pictures taken with the 85/2 to be dull and life-less, and images took on a greyish cast as well. I'm aware of reports claiming this lens is an excellent perfomer and am at a loss to explain this discrepancy in opinions (I've tried several 85/2's and they all behaved in a similar manner).
Questo invece è il pensiero di Ken Rockwell, specifiche tecniche a parte:
This is a magnificent lens. It's sharp, compact, fast and extremely well made. I personally prefer the 85mm focal length over other lenses; it's just the way I usually see the world.
Specifications
It has five elements in five groups.
It has a seven-bladed diaphragm stopping down to f/22.
It focusses down to 0.85m or 2.8,' which gets you to about the same reproduction ratio as most other Nikkor manual focus lenses.
It takes 52mm filters.
It is 2.5" (64mm) around by 2.4" (61mm) long and weighs 11 oz (310 g).
It takes an HS-10 hood. I've never bothered with it, and heck, you can use any ordinary rubber hood from a normal lens, too.
Performance
This is a very good lens. I see no lateral color. On the bench it has a tad of axial chromatic aberration not seen on film.
It is very sharp. Here's the lowdown by aperture:
f/2.0: Sharp and contrasty all over; the best performance I've seen with any lens at f/2. There is minimal falloff. At 22x there is just a little bit less sharpness wide open than at smaller apertures, and a little bit of softness in the corners compared to smaller apertures. This is outstanding performance.
f/2.8: Looks great! At 22x it's still a tiny bit less sharp than other apertures, but still outstanding.
f/4: Still outstanding and improving both center and corners
f/5.6 - f/8: These are the optimum apertures in the center of the image.
f/8 - f/11: These are the optimum apertures for the corners of the image.
f/16 - f/22: Some random underexposure with FA camera in auto modes, hold the aperture preview button down while releasing the shutter (or starting selftimer) and this goes away.
It has few ghosts or flare issues on film, even though I can see a large blue blob on the opposite side of the image through the viewfinder when pointed directly at the bright sun. This is stupid; I'm surprised I didn't melt the matte plastic viewfinder screen. There is a point sized ghost on the opposite side of the image at apertures larger than f/8.
There is no distortion.
Ora io mi chiedo quale sia la verità, possibile che Nikon dopo il mitico 85/1.8 abbia potuto produrre un'ottica cosÌ scarsa come sostiene il buon Bjørn?
L'ottica rispetto al predecessore è meno luminosa di 1/3 di stop ma soprattutto è più leggera e compatta.
Avete esperienze in merito, visto che come ottica da viaggio è particolarmente vantaggiosa?
Ricordo che la usava Massimo e forse anche il Bartoli ricorda qualcosa.
Ciao
Luca