Question about Sigma AF 70-300mm f/4.0-5.6 DL Macro Super Lens for Canon-EOS
This little used lens which is one and a half years old seems to have developed a mechanical focusing problem. It focuses perfectly in auto or manual to 40ft approx but almost seizes between 40 and infinity. The autofocus will not work past 40ft unless you mechanically force it which does not feel right at all. Move it a few times manually and it will work in a fashion but not perfectly. It feels like I could be doing damage as I force it past a virtual stop at 40ft. Is this a known problem? Any solutions? Given it was little used and well looked after, have I any point in seeking warranty / goodwill repair?
Had this lens for my Pentax and used it for more than 10 years without trouble.
Have you got the lock on? should be a little button on the side.
Has it been dropped, maybe damage to the threads inside.
If its still under warranty then take it to the place you bought it from with all its paper work and get it checked out.
Posted on Feb 10, 2018
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Posted on Jan 02, 2017
It will not focus on anything closer than 5 feet.
(From Sigma lens literature) Capable of macro photography, this lens has a 1:2 maximum close-up magnification at the 300 mm focal length. It's the ideal high performance lens for portraits, sports photography, nature photography, and other types of photography that frequently use the telephoto range. It also has a switch for changeover to macro photography at focal lengths between 200mm and 300mm with a maximum close-up magnification from 1:2.9 to 1:2. The minimum focusing distance is 1.5m / 59 in. at all zoom settings.
Posted on Dec 28, 2007
SOURCE: 135-400mm lens on nikon d40
Unfortunately, this lens is not supported by the D40 due to Nikon's unfortunate decision to leave out the autofocus motor from this camera. This is why I tell folks not to waste their money on the D40 - access to the many, many, many lenses that Nikon has made over the years, many of which are available used for a substantial savings, is lost on this camera. The only Nikon lenses that work are AF-S lenses, and some third party lenses that have their own internal motors. I got a list of Sigma lenses that are compatible with the D40 for you:
The list of compatible Sigma lenses for the Nikon D40 as of the current date is as follows:
Sorry for the bad news. The cheaper thing at this point may be to sell the D40 and get a D80. I personally have a D70S, but that is no longer made.
Posted on Jan 27, 2008
SOURCE: autofocus not working
If you don't know how to fix it yourself send it to Sigma UK (01707 329999). They are quite resonable charges for that sort of fault. Their website give a price guide depending on lens and fault. Steve
Posted on Mar 06, 2009
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