Question about Sigma 1.4x EX APO DG TELE CONVERTER (CANON AF)

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I have a sigma apo 1.4x DG teleconverter for pentax it does not seem to fit any of the pentax lens i have. do i need an adapter or different teleconverter?

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The rear element of the lens is near the mount the converter
will not fit the conveter needs about 10mm space at the
back of the lens

Posted on May 13, 2009

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Sigma 2x tele converter is loose


I had an issue with my Sigma 1.4X TC where it became loose after several years of use. I fixed min as follows:

On the camera-mount side (where TC attaches to camera) I removed the tiny four screws. Then I very carefully lifted up the metal mount being careful not to damage the ribon cable which is attached to it. I DID NOT complete remove it, I just tilted it up so as not to damage the cable. I then tightened the 3 screws that I found below that as all three were loose. I think that there may be four screws, but I could only see 3 of them without removing the plate further. after tightening the screws and replacing the metal plate and the four screws holding it, the mount was again tight and the attached lens functioned normally.

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Want inexpensive 2x af teleconverter for d70 nikon lens 80-200 ed


You can order the Tamron 2x teleconverter here. Be aware that not all lenses are compatible with teleconverters, and you can actually damage some lenses by trying to use them with a teleconverter.

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I need to get a sigma 300mm f2.8 EX APO HSM lens (Nikon mount) fixed. I've already sent it in to Sigma's main referral center (C.R.I.S. in AZ), and they said they couldn't get a part to fix the...


Hi, I strongly doubt you would be able to fix it yourself. My suggestion would be to contact Gus Lazzari he seems to have access to a lot of camera and lens parts no matter how old they are.

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I am having a sigma lens sigma mount i like to put it on nikonD. 40 is it possible


Sigma makes lenses with a variety of mounts. If it has a Nikon mount then it will fit. If it has some other mount then it will not fit.

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1 Answer

Cant seem to fit the converter to a 50-500mm ex sigma lens ?


It all depends upon the lens. Not all lenses can accept teleconverters, usually due to projecting rear elements incorporated into the individual lens design. With such lenses, manufacturers will either advise that a particular lens will not be compatible with a teleconverter or for some models may produce a custom matched model usually for that lens alone.

Which exact lens are you trying to fit to your Sigma 1.4x EX APO DG teleconverter?

Feb 05, 2010 | Sigma 1.4x EX APO DG TELE CONVERTER (CANON...

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HI I HAVE A PENTAX GX10/20 AND HAVE A SIGMA 600mm F8 MIRROR LENS AND BOTH MY PENTAX DONT SEEM TO BE COMPATIBLE WITH IT, IS THERE A CONVERTOR AVAILABLE TO ALLOW ME TO USE THE LENS.


Is it a pentax fit 600 lens if you can fit it but it wont work the lens is a manual focus lens and has a fixed iris you will have to set the camera to use a manual lens look at the ins book

Dec 06, 2009 | Digital Concepts (1352T) Lens Converter

1 Answer

I have a sigma 1.4x teleconverter which I use with a sigma 300mm f2.8 lens. There seems to be excessive play between the converter and lens. Does anyone know how this can be rectified?


There sometime is a bit of play, but if it is excessive, the connection could have worn some. It would probably be cheaper to buy a new converter, but you could try contacting Sigma about it.

Jul 06, 2009 | Lens Accessories

1 Answer

X 2 converter


  1. with this combination of camera/lens you will not have AF when a x2 converter is applied! that is because in all canon cameras (except 1D series) there is no AF when the Aperture is smaller then F5.6.
  2. if you don't mind using MF, u need the sigma 2x EX DG Tele Converter.

Sep 30, 2008 | Sigma Lens Accessories

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