Anyone tried cheap fisheye adapters?

Started May 6, 2011 | Discussions thread
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jazzroy1972
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Anyone tried cheap fisheye adapters?
May 6, 2011

Hi all,
I'm tempted by those cheap fisheye lenses you can find on ebay.

They have usually a macro lens + a fisheye lens and cost around 30 bucks.

Multiply factor ranges from 0.25 (cost double) to more common 0.40-42-45.

Anyone can give some report on them?
Image quality degrades?
In which terms? Sharpness, CA, vignetting..

Note:

please avoid answers like "You get what you pay for" or "if you want decent quality go for sony adapter" or "a 30 $ lens is bad quality for sure", I'd like to know informations from real test by users that have them, and not just speculations.

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