Will this Sigma 50mm F1.4 EX DG HSM work in auto-focus with a D40x? Can't find comtability info anywhere.
asked by Smitty on September 9, 2008
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A
Yes it will. HSM is the same as AF-S for Nikon brand lenses. HSM and AF-S lenses do not require the in-body autofocus motor that the D40X does not have.
BT answered on October 6, 2008
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A
I agree with S. Mason. This is similar to the Sigma 30mm 1.4 HSM, which is widely touted to work on Nikon D40/D40x/D60.

But if you can wait until December 2008, Nikon will release its version -- a 50mm 1.4 AF-S prime -- for less than the Sigma 50mm HSM!
Tim Tim answered on October 10, 2008
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A
Has the lens you mentioned been released?
Bill answered on December 28, 2008
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A
Yes, the Nikon 50mm AF-S f1.4G has been released and is available at many retailers. In fact, some have already sold out of the first shipments.
BT answered on December 28, 2008
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A
Pardon my asking, but is it different than the lens I am asking about?
Bill answered on December 28, 2008
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Sorry, I guess I should have asked for clarification. When you asked if the "lens you mentioned" had been release, there had been 3 lenses metioned... the Sigma 50, the Sigma 30, and the Nikon 50. So... which lens are you asking about? Only the Nikon 50 is a recent release... the other two have been out for a while, which is why I assumed the Nikon was what you were asking about.
BT answered on December 28, 2008
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I probably wasn't clear....it seems that there was a new 50mm lens put out by Nikon
# 2180 AF-S Nikkor 50mmf/1.4G which I think replaces the slightly older one.
Bill answered on December 28, 2008
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A
Yes. The primary difference is that the older is an "AF" lens as opposed to an "AF-S". The older lens requires a body that has a "focus motor" built into the body to power the autofocus portion of the lens. The new AF-S version has all of the necessary components to do autofocus within the lens, so it will work on all Nikon bodies regardless of whether the body has an internal AF motor or not. The only bodies to date that do NOT have the motor are the D40, D40X, and D60. I believe this is the complete list to date that will not autofocus with the older AF lens version.

Also, the new version is a "G" which means there is no external aperture ring. Aperture must be set with the camera. It cannot be set on the lens. This is of no consequence unless you plan to use the lens with an older (non digital) body. It does not matter on any Nikon digital body.

There are other differences, but those are the main ones. The new AF-S lens focuses faster than the older version and is quieter. I have an AF and an AF-S. I will be selling the AF. In the two examples that I have, the newer lens is MUCH sharper wide open than the old both in the center and especially in the corners. It is KILLER sharp across the full frame on a D3 by f2. It also gives better contrast than the older AF lens. I have compared my two on both the D60 and D3.

On the downside it is larger and more expensive.
BT answered on December 28, 2008
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A
Thank you. Do you have any fotos posted on flickr, etc where you used this lens? I ned to check out both the slightly older AFS lens and this one to make sure I don't get them confused...I can do that easily.
Bill answered on December 28, 2008
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No, sorry. The only things I have online are in secured customer areas.
BT answered on December 28, 2008
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