I actually didn't choose to, per se. I bought the Kenko originally to use on my (Tokina) 300mm f/2.8. Eventually, I decided the 300mm was bigger and heavier than I cared to lug around anymore and I traded it for a 300 f/4 Canon, Canon 1.4x and cash. Coincidentally, I then found myself with three Canon telephotos (70-200 IS, 100-400 IS and 300 f/4), all of which the Canon fits. So I kept the Canon and traded the Kenko towards a 2x Canon. I don't think the Canon is any better than the Kenko optically(I've no experience with the Tamron), but the Canon TC's are better sealed I suppose. The two negatives for the Canons as I see it are price and very narrow compatibility.
What strikes me as odd is that the Kenko manages to achieve results comparable to the Canon without the forward extension, which makes me think the Canon design is nothing more than a deterrent to the use of third party telephotos. Back in the 70's I would never have bought such a ridiculous design, it would have prevented me from stacking a pair of 2x TX's on my trusty Vivitar 200mm f/3.5 for those astounding moon shots I so eagerly anticipated appearing in that tray of Dektol. ;-) Tom P. > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Norby > Sent: Thursday, May 13, 2004 2:49 PM > To: [EMAIL PROTECTED] > Subject: Re: EOS lens purchase questions > > As Gary Fisher once said, > > > and a Kenko Pro 1.4xTC and maybe a set of extension tubes > > > > I owned a Tamron SP 1.4x and it was excellent. Only traded it 'cos I > got > > a good deal on a month old EF 1.4II. > > What I find really funny, is that while all three of you (Gary, Rober > and Tom) all praised the Kenko Pro/Tamron SP TCs highly (Are they by > the same manufacturing process, or are they just similar in quality?) > you all went with Canon TCs when you had the chance :) * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
