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SIGMA 28-70mm f/2.8-4 Nikon Mount AF Auto Focus Zoom Lens

Ad Description

Made in Japan. Used. Fully tested in very good working condition. 100% workable.
Cosmetically, it has traces and scratches on body (look at photos) that don't affect quality of photos.
Lens with front and rear caps, Hood.
S/n: last photo.
EMS 50 baht, Cash on Delivery Available (COD เก็บเงินปลายทางได้)
or meeting in North Pattaya.
More photos and questions via Line ID: gnnick

Compatibility:
Nikon Full Frame cameras FX
Nikon APS-C cameras DX
format: Full frame
AF Drive: In Body
max. aperture: 2.8-4
min. aperture: 32
focal range(mm): 28-70
angle of view: 75,3 - 34,3
min. focus distance(mm): 500
filter rotate focusing: Yes
filter rotate zooming: Yes
This is a small, light general-purpose zoom. It's well built for an AF lens, about the level (if a little better) than the Nikon 18-55mm kit lens.
It's at 28mm when fully extended and 70mm when retracted, which I like because it means the lens is at it's smallest at the long end, so good for portraits. The front element turns when focusing and, because the hood locks onto the rotating end of the lens, if you don't disengage the AF when adding/removing the hood then you'll force the AF motor and potentially damage it. That's a very poor design decision and it's a bit annoying to have to remember to disengage the AF every time.
The lens is soft wide open at 28mm and doesn't really become acceptable until f/4, then it's better at f/5.6 and more so at f/8. By 35mm it's already much better wide open (f/3.5) and usable. From 35mm onwards the lens is quite sharp wide open, but benefits from being stopped down. Still, it's usable wide open for most of the range. The lens never gets really, really sharp no matter how much it's stopped down (my benchmark for sharpness is the DA 35mm limited) but it's pretty good.
For some strange reason this lens autofocuses fine on all my film and digital cameras except the SFXn. I assume there's a software/firmware incompatibility between the lens and this specific camera model.
Overall I like the lens, it's a solid performer though due to the focal length and speed I use it more on my AF film cameras than on digital. On film it's extremely useful and is the only zoom I've used that I would consider using in place of a handful of primes. On digital it's OK but the focal length isn't so useful.
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