Irix has announced a promotion for the Irix 11mm F4 Blackstone lens. There is a cashback of $100. As a reminder, the price for this lens is $649 on Bhphotovideo.com and Adorama.com online stores. The Irix 11mm F4 Blackstone Lens is wide-angle prime lens for full-frame DSLRs. The lens has a rugged design and is available in versions for Canon …
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