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

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Sigma auto focus 1:3.5-4.5

I recently purchased a 'sigma auto focus 1:3.5-4.5' from ebay. the lens works perfectly but the switch between manual and automatic focus won't budge from AF to M. is there a button or something to make the switch move or is it busted?

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Hi    The switch is held on by two screws you can remove the screws    and the switch will fall off it will need cleaning 

Posted on Dec 13, 2008

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Posted on Jan 02, 2017

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1 Answer

Auto Focus won't work


Another cause of auto focus failure is the circuit connecting the moving parts inside the lens. These "Flexi circuits" move with the lens components and wear out after a while. They are cheap enough to find on ebay and easy to replace.

Dec 06, 2013 | Canon EOS 450D Digital Camera

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Hi! I have Sigma AF APO 150-500mm (just two month old) accidentally while using auto focus ring was moved manually while it was AF lock mode. Now the lens only works on manual and not auto focus. I use...


you need replace the focus ring, the camera can not without it especially taking photo.we are selling the camer parts in china. your visiting for our website is highly appreciated!
http://www.digitalcamera-parts.net/
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e-mail:e-8090team@hotmail.com

Aug 30, 2011 | Cameras

1 Answer

My shutter won't fire using 18-55 lens, either on Manual, P or Auto mode. It is set to AF. But when lens is set to MF, shutter fires. I tried switching to another lens and shutter is perfectly fine.


I could be that your lens isn't focusing. If the Auto focus can't find something to focus on the shutter won't fire. If you are shooting in low light sometimes it has trouble try shooting something that is well lit. also your auto focus point may be somewhere other than the center. there is a button on the top of your camera that looks like this [ ][ ] [ ] [ ]
More or less that will switch where your focus point is. If you look in the view finder and see a red dot when you push on the shutter button that is your focus point. push the above button until the red dot is in the centre. that may fix your problem.

Jul 26, 2011 | Canon EOS 450D Digital Camera with 18-55...

1 Answer

I have a D5000 camera w/ kit lens VR 55-200, less than a year old. Recently and only occasionally what is happening is when I press the shutter release button, the lens won't focus, it won't move...


Your camera is still under the one year Nikon warranty. Call Nikon's repair depot at 1-800-NIKON-US (1-800-645-6687) 9AM-8PM EST, Monday to Friday. They will verify your warranty and assist you in returning it for repair.

Jun 08, 2011 | Nikon D5000 Digital Camera

1 Answer

How about a Sigma DL ZOOM auto focus 75-300mm 1:4-5.6 lens onto a Nikon D-40?


That particular lens should work on the D40 if it is made for the Nikon mount.
If not, you'd need an adapter to fit it to the Nikon mount. (i.e. if it is a Canon-type lens, you'd need a Canon-to-Nikon lens mount adapter).
You'd probably have fair luck selling it on eBay and buying the right kind of lens for your Nikon.

Mar 06, 2011 | Sigma SD14 Digital Camera

2 Answers

I have been offered a SiGMA 400mm F/5.6 manual lens for a minolta mount. Will it fit my camera? Cheers Pete


Minolta had two lens mounts. One for manual focus SLR film cameras and one for Auto Focus SLR Maxxum film and digital SLR cameras. Sony uses Minolta Maxxum lens mount.
If the Sigma 400 f5.6 lens was made for Minolta X-700 series, XG, series, XD series, SRT series, then it will not fit on your camera.


Jun 17, 2010 | Sony Alpha DSLR-A200K Digital Camera

1 Answer

Sigma 70-300 Macro Motorised Lens for Nikon has stopped autofocus


If you just purchased the lens I would take it back sounds like the lens is jarred and defective should still be on warranty

Jan 22, 2009 | Nikon D80 Digital Camera with 18-135mm...

1 Answer

HELP Sigma 24-60MM wide Angle


The helicoid or the barrel thread in the lens may be jammed. The lens will have to be serviced. You should take it back for warranty service.

As for myself, I aways buy origional manufacture lenses and accessorites for my cameras.


Jerry G.


Jun 06, 2008 | Nikon D80 Digital Camera with 18-135mm...

1 Answer

Absolutely screwed up, recently purchased camera


try to shoot without a card. or better use a known good card. [:0)

Jan 10, 2008 | Canon Rebel XT / EOS 350D Digital Camera

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