Question about Nikon D40x Digital Camera

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Autofocus is not working

Hello sir,
i have a nikon D40 Camera.Autofocus is not working 4 few days.i knw what problem there have????????? plz reply as well as possible

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Out of the box, I couldn't get a center focus shot. Out of desperation I reset the camera (push info and magnify buttons at the same time). That solved the problem.

Posted on Jul 27, 2009

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Posted on Jan 02, 2017

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1 Answer

Sigma DL IF 28-300mm F/3.5-6.3 Lens is ok for D40?


That would depend on what you mean by "ok." Assuming you get the lens with a Nikon mount, it will fit onto the D40 and meter properly. However, the D40 lacks an autofocus motor and thus this lens will not autofocus. You can still focus manually.

Aug 31, 2012 | Sigma 28-300mm f/3.5-6.3 DL Aspherical IF...

1 Answer

Will the Nikon Sigma 70-210 F4-5.6 55MM AutoFocus lens fit on my nikon d40?


Yes, it will fit. However, lacking a focus motor, it will not autofocus on the D40.

Jan 20, 2011 | Nikon Sigma 70-210 F4-5.6 55MM AutoFocus...

1 Answer

Bought a Sigma DG 70-300mm 1:4-5.6 autofocus for my Nikon D40. When the lens is attached the settings get locked on MF. Is there anything I need to adjust to fix this problem? Charles


The Sigma 70-300mm f/4-5.6 DG will not autofocus with the D40 since the lens does not feature an internal focusing motor (HSM). The D40 does not have an AF motor in the body and hence it can autofocus only with lenses featuring an integrated motor (eg. Nikon AF-S lenses, Sigma HSM lenses, Tokina DX II series etc). Unfortunately you can use the said lens only in MF mode.

Sep 02, 2010 | Sigma 70-300mm f/4-5.6 DG Lens

1 Answer

Using a Nikon D40 digital slr with a AF-S DX Nikkor 18-200 1:3.5-5.6 G ED lens I was previously able to autofocus bun now am not. Can you suggest reasons why this may be?


Please check if the Autofocus-switch on your lens is set to M/A. Also check if the Autofocus on your camera is switched on. For detailed information about your cameras autofocus, please check this site: http://www.kenrockwell.com/nikon/d40/af-settings.htm

Jul 18, 2010 | Nikon D40x Digital Camera

1 Answer

I just bought a tamron di 2 AF 55-200mm f/4-5.6 LD macro for my nikon D40 and i can't get it to autofocus


That 2x is not AF-s compatible. It is the older Af style which the d40 does not support. Your camera store should have known this when they sold it to you, unless you bought it mailorder. Then see if they will let you return or exchange it.

Nov 04, 2009 | Tamron Autofocus 2x Teleconverter Lens for...

1 Answer

The Autofocus does not work on my Nikon D40


1 Possiable dirty lens contact terminals
2 Auto focus motor in lens is jamed/malfuntion
3 Auto focus engagement pin on camera body is not engaging the lens
4 Correct lens,old nikon lens and some 3rd party lens wont work on the D40

Jul 18, 2009 | Cameras

1 Answer

170-500 apo nikon for nikon D40


it will mount fine, but I don't believe you will have autofocus.

Jun 09, 2009 | Sigma Zoom Telephoto 170-500mm f/5-6.3 APO...

4 Answers

Tamron 28-300mm Model 185D Auto Zoom on Nikon d40


Autofocus function on the D40 only supports lenses with the
AF-S feature, which have an autofocus motor built into the lens,
instead of using an autofocus motor drive built into the camera.

The Tamron lens you have, does not have a built in motor and
the autofocus function relies on the motor drive in the camera.

It will not work with the D40 or D60, but it will work with other
Nikon digital SLRs, such as the D80. Need to get an AF-S
type lens or upgrade to different Nikon digital SLR. Unless
you do this, you will have to manually focus the Tamron lens.

All of the Nikon DX (for digital) series lenses are also AF-S
type, so they will work with the D40, which is designed as
an entry level digital SLR, therefore it is intended primarily
for use with DX lenses, which are typically sold in a kit with
the D40. Most common one is Nikkor 18-55mm DX AF-S.

Other Nikon AF-S lenses made for film cameras (FX type)
will also work with the D40, but these tend to be expensive
professional models. DX series lenses tend to be more
affordable. You might consider the 18-200mm DX AF-S
as an alternative to the Tamron, but these are not cheap.

Apr 19, 2008 | Tamron 28-300 MM XR AF F/3.5-6.3 LD ASP...

1 Answer

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:
  • 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:  http://www.imaging-resource.com/NEWS/1177682545.html
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.  

Dec 06, 2007 | Sigma Zoom Tele 135-400mm f/4.5-5.6 APO...

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