Hi Ashok, most of the time one does not need a warranty for a lens, either it works or fails right away. so 90 days is more than enough to test and return a product. I have done that with something I bought from Samsung camera. So when some one says 10 years guarantee will the company be there? second will you have all the documents 10 years from now? So go for pure performance that is certified. Many times telephoto lens lack light gathering capacity leading to fuzzy pictures. Ask to see a test grid. this shows, spherical aberration if any color loss and also clarity, check edges of the black and white scare. good luck.
P.S. I use both Cannon and Nikon lens mostly. Yes I have a Tamron too and that is very good. If you are a butterfly chaser get a Macro too for ultra close up. MK To: [email protected] CC: [email protected] From: [email protected] Date: Mon, 10 Jan 2011 22:45:32 +0530 Subject: [ButterflyIndia] Any information or reviews on Opteka 500mm f/8 Super Telyphoto lens Hi! I was going through several forums on the said topic. I was stunned to see the price tag (7500), performance, robustness and the 10years warantee on this lens. Can any body through more light on this product!! If positive reports come in this can be a boon for people who wants to go for wild life photography with minimum expenses. Flickr discussion: http://www.flickr.com/groups/photo-lanka/discuss/72157620054011498/ Regards, Ashok -- Enjoy
