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PostPosted: Sat Mar 13, 2010 12:36 pm 
Hi , Can anyone tell me if i can get a tele-converter for my new 70-300 sigma lens ? Its the new one from sigma, the 70-300 DG OS.

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PostPosted: Sat Mar 13, 2010 1:20 pm 
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Joined: Fri Sep 05, 2008 4:42 pm
Posts: 1388
Location: The Netherlands
I will not recommend the use of a Teleconverter for lenses with Apertures smaller than f/2.8. It is possible maybe on this lens, but AF and optical quality will not be there ;-)

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Lowepro Nova 200 AW filled with Nikon D90 + MB-D80
18-70 DX, 70-300 VR, 35 1.8 DX, SB-700


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PostPosted: Sat Mar 13, 2010 1:24 pm 
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Joined: Sun Feb 15, 2009 12:59 pm
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Location: The Netherlands
I agree, you will lose autofocus, the quality will be very poor, and you will be shooting at F/11 (which means you will need a LOT of light).

If you want that much range in a small package, maybe take a look at 500, 600 or 800 mm mirror lenses. They offer the same, but with better imagequality and generally F/8 instead of F/11.

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