Question about Sigma Zoom Tele 135-400mm f/4.5-5.6 APO Asphrical Auto Focus Lens

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135-400mm lens on nikon d40

Hi I baught an sigma 135-400mm apo autofocus lens. But if I put it on the camera the autofocus doesnt want to work. I need to manually focus. Whats wrong?

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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:

  • 10-20mm F4-5.6 EX DC
  • 12-24mm F4.5-5.6
  • 17-35mm F2.8-4 DG
  • 50-500mm F4-6.3 DG
  • APO 50-150mm F2.8 EX DC HSM
  • 70-200mm F2.8 DG MACRO
  • 80-400mm F4.5-5.6
  • 100-300mm F4 DG
  • 120-300mm F2.8 DG
  • 300-800mm F5.6 DG
  • 14mm F2.8 EX
  • 30mm F1.4 EX DC HSM
  • 150mm F2.8 EX DG
  • 180mm F3.5 EX DG
  • 300mm EX DG
  • 500mm EX DG
  • 800mm f5.6 EX DG
from here:
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


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