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From: Lou Lipnickey on 5 May 2008 10:07
Has anyone had experience with a Sigma 18-125mm f/3.5-5.6 DC used with a
Nikon D40?
Specifically, does this lense have built in autofocus motor and will it
focus sufficiently fast on a D40?

Also, what are the differences in the various Nikon models D300, D70,
D80, D40 etc with respect to autofocus, are all the autofocus motors in
the lenses? Maybe there is web ref on this.
Thanks - Lou
From: Mark Sieving on 5 May 2008 10:42
On May 5, 9:07 am, Lou Lipnickey <lou.lipnic...(a)pobox.com> wrote:
> Has anyone had experience with a Sigma 18-125mm f/3.5-5.6 DC used with a
> Nikon D40?
> Specifically, does this lense have built in autofocus motor and will it
> focus sufficiently fast on a D40?

The 18-125mm F3.8-5.6 DC OS HSM has the autofocus motor. How fast it
is on a D40 I can't say, but it will autofocus. This is a new lens,
and I'm not sure if it's available yet. The earlier version will not
autofocus with the D40, as far as I know.

> Also, what are the differences in the various Nikon models D300, D70,
> D80, D40 etc with respect to autofocus, are all the autofocus motors in
> the lenses? Maybe there is web ref on this.

The D40, D40x, and D60 do not have an autofocus motor in the body of
the camera, and require a motor in the lens to autofocus. All other
Nikon digital SLRs have an autofocus motor in the camera and will
autofocus with any AF lens.

Nikon lenses designated AF-S and AF-I have an autofocus motor in the
lens. AF-I is an older design. Sigma lenses designated HSM have an
autofocus motor. I don't know of any other third party lenses with
autofocus motors, but there may be some out there now.


From: Lou Lipnickey on 5 May 2008 10:50
Great info, thanks very much!

Mark Sieving wrote:
> On May 5, 9:07 am, Lou Lipnickey <lou.lipnic...(a)pobox.com> wrote:
>> Has anyone had experience with a Sigma 18-125mm f/3.5-5.6 DC used with a
>> Nikon D40?
>> Specifically, does this lense have built in autofocus motor and will it
>> focus sufficiently fast on a D40?
>
> The 18-125mm F3.8-5.6 DC OS HSM has the autofocus motor. How fast it
> is on a D40 I can't say, but it will autofocus. This is a new lens,
> and I'm not sure if it's available yet. The earlier version will not
> autofocus with the D40, as far as I know.
>
>> Also, what are the differences in the various Nikon models D300, D70,
>> D80, D40 etc with respect to autofocus, are all the autofocus motors in
>> the lenses? Maybe there is web ref on this.
>
> The D40, D40x, and D60 do not have an autofocus motor in the body of
> the camera, and require a motor in the lens to autofocus. All other
> Nikon digital SLRs have an autofocus motor in the camera and will
> autofocus with any AF lens.
>
> Nikon lenses designated AF-S and AF-I have an autofocus motor in the
> lens. AF-I is an older design. Sigma lenses designated HSM have an
> autofocus motor. I don't know of any other third party lenses with
> autofocus motors, but there may be some out there now.
>
>
From: nospam on 5 May 2008 11:58
In article
<a3582d40-6266-42b2-b419-e25b02c2dbe3(a)x35g2000hsb.googlegroups.com>,
Mark Sieving <mark_sieving(a)yahoo.com> wrote:

> Nikon lenses designated AF-S and AF-I have an autofocus motor in the
> lens. AF-I is an older design. Sigma lenses designated HSM have an
> autofocus motor. I don't know of any other third party lenses with
> autofocus motors, but there may be some out there now.

tamron has a few lenses with built-in motors, and there are a couple of
sigma lenses that have a motor but not an hsm motor, so they'll still
autofocus. there's a list on sigma's website of what's compatible.
From: Hal Murray on 5 May 2008 14:23

>Nikon lenses designated AF-S and AF-I have an autofocus motor in the
>lens. AF-I is an older design. Sigma lenses designated HSM have an
>autofocus motor. I don't know of any other third party lenses with
>autofocus motors, but there may be some out there now.

What are the advantages and/or disadvantages of putting the
motor in the lense?

--
These are my opinions, not necessarily my employer's. I hate spam.

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