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Sigma 135-400 MM f/4.5-5.6 ASP AF APO

Review Date: Nov 10, 2005 Recommend? yes | Price paid: Not Indicated | Rating: 9 

Pros: Price, build quality, included carry bag and tripod collar. Images can be very sharp provided one adheres to the rules of super telephoto shooting: use a tripod, monopod, bean bag, anything to keep motion blur at bay. Sharper than other "consumer" type lenses even at 400 and wide open.
The lens is definitely not as sharp wide open at 400mm as it is stopped down, but this is a common issue with lenses in this clas. Best used at F8 and up, but F6.3 will do the job is light is a problem.

I recentely got a D70s and since I mostly do nature (more specifically birds) and motor sport photography, I purchased the Sigma 135-400 APO lens. If I had the money, I would have gone for the 80-400 OS or 80-400 VR Nikon, but that is three times the price. A 200-400 F4 Nikon would have been the ultimate ... but that is 12 times the price ...

All in all, I'm very happy with the lens and would gladly recommend it to anyone on a limited budget. You would have to get a decent monopod (better than flimsy tripod by a long way) to get the most out of this lens. I prefer using a monopod in any case as birds tend to present fleeting chances and a tripod take to long to set up and get the camera pointed in the right direction.

Obviously, low light shooting is out of the question if you shoot moving subjects, even if you do manage to keep the camera motionless, the subject is bound to be blurred, unless it is following a predictable path.

For the money, you realy can't go wrong on this one.