teleconverter and distortion?

Started Apr 27, 2014 | Discussions thread
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teleconverter and distortion?
Apr 27, 2014

Hi recently purchased a 2x telephoto converter lens for my 18-55mm lens.
It's the kind that screws onto the filter ring in front of the lens.

I was looking back though the pictures I took with the lens on and there is significant distortion.

Seems to be very strong around the edges and just off center to the top of my images.

The pictures look terrible.

Does anyone have any idea what I'm doing wrong? or how to correct the distortion?

 CircaM's gear list:CircaM's gear list
Pentax K-r Pentax smc DA 18-55mm F3.5-5.6 AL Pentax smc DA 50-200mm F4-5.6 ED Adobe Photoshop CS6 extended +1 more
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