Reptile Forum, Reptile Classifieds - CaptiveBred

Gazz · Contributing Member Joined: 13 Dec 2005 Posts: 151

Hi camra pro's.I've just got a sigma 170-500mm now this work mannally with my jessop 2x coverter.But on looking on getting a sigma 2x converter really just for personal prefrance but also most likely the sigma 2x is a better converter.But i can't find any info to say that the sigma 170-500mm is compatable with the sigma 2x converter.Anyone know in what way the sigma 170-500mm and the sigma 2x converters are not compatible ??.Coz the sigma 50-500mm and the sigma 2x converter are compatible mannally ??? .So for what reason would one lens be compatible and the other not ??.

To use a sigma 2x converter do i have to invest in a sigma 50-500mm Rolling Eyes

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slippery42 · Posted: Fri May 30, 2008 7:59 pm Post subject: ooooooohhhhh

Personally I wouldnt bother ar the images quality is likely to be poor
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Using Nikon D300's and pro lenses

Stuart · Posted: Fri May 30, 2008 8:21 pm Post subject:

Have to agree with graeme here..the 170-500mm is a slow lens to start with but adding a 2x converter to it will make it very slow indeed and you will need one hell of a sunny day to get decent shutterspeeds at the apertures you will have. i would have thought it was compatible though..The 2x converters come up for sale second hand quite often..probably due to the image degradation you get with them.. Confused

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