The Opteka 6.5mm f3.5 HD Aspherical Fisheye with removable hood is one of the featured eBay Deals for $150, but you can actually get it for even less, $140 with free shipping by 47th Street fulfilled by Amazon, so it gets Prime shipping, and you deal with Amazon’s customer service in case of questions or problems. The $140 price is for the Canon and Sony-Minolta-Dyxum-Alpha. The others go for $150+.
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