converters (1 Viewer)

will bowell

Will the wandering birder

• Nov 2, 2004

• #1

Hi all,
Sorry if this question has been posted before, but I am just in the process of getting a Canon 20D and am think about the Sigman 500mm lens. I was wondering can you use Canon converters with this lens?

Thanks
Will

 

P

pete schofield

Well-known member

• Nov 2, 2004

• #2

Hi Will
And welcome to the forum.

As a new user of the 20D I will try and answer your question and if I am wrong I am sure one of the other members will put us both right.

I believe the canon convertor will work with most other makes of lens presuming they are produced to work with an EF camera. As to how well it will work is another matter, you don't specify as to which Sigma 500 lens you are referring to. But as a rule for AF to work you need a lens of at least F4 for the EF2 and I think F5.6 for the EF1.4. The convertor will work with smaller apertures but in manual mode.

I use the EF2 with a Canon EF400 F5.6 and focus manually.

Hope this answers your query.

Pete

 

will bowell

Will the wandering birder

• Nov 2, 2004

• #3

pete schofield said:

you don't specify as to which Sigma 500 lens you are referring to. But as a rule for AF to work you need a lens of at least F4 for the EF2 and I think F5.6 for the EF1.4. The convertor will work with smaller apertures but in manual mode.
Pete

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Yeh, its the Sigma 500mm F4.5 APO EX lens that I am thinking about.

Will

 

Andy Bright

Administrator

Staff member

• Nov 2, 2004

• #4

will bowell said:

Yeh, its the Sigma 500mm F4.5 APO EX lens that I am thinking about.

Will

Click to expand...

Nice lens, use one myself (Nikon, so no worries with tc's). There's a thread around here somewhere that describes use of this lens with the 10d and various teleconverters... I'll see if i can find it.
regards,
Andy

 

Andy Bright

Administrator

Staff member

• Nov 2, 2004

• #5

There's a thread HERE look for Roy H's posts on this. I'm sure there was more but maybe that was a private message he sent me.

 

will bowell

Will the wandering birder

• Nov 3, 2004

• #6

Thanks Andy. Its been most helpful.

cheers
Will

 

condyk

Well-known member

• Sep 4, 2005

• #7

There is a great 'sticky' over at the Canon DSLR Forum here:

http://photography-on-the.net/forum/showthread.php?t=41922

You need to be careful about both the Sigma and Canon TCon's as they are both lens specific (basically they are an identical design) and cannot be used more generally. The Kenko Pro and Tamron SP are much more flexible, cheaper and similar q2uality.

 

rezMole

Well-known member

• Sep 4, 2005

• #8

condyk said:

The Kenko Pro and Tamron SP are much more flexible, cheaper and similar q2uality.

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Not sure, but i don't think the Tamron converters are produced anymore.