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Message: <blockquote data-quote="Dave Williams" data-source="post: 3234881" data-attributes="member: 53820">I had to smile when I saw your post! The lens will hold it's value better than a car but when the car packs in ...ah, well worry about that later!I think you have made a sensible choice as what you haven't had you can't miss and as yet you haven't had the light weight of a 500mm Mk2 so your trade for the 600mm will be a definite plus.I have only just come to the conclusion that I will probably never own a Mk2 600 as it's hard to justify spending the dosh when I have a 500 but I won't sell the 500mm either,it's the ideal all round lens for me. I just wish I had bought the 600 instead then I could have traded down so to speak. I'm only going to get older and the weight more telling although I'm pretty well built and fit for my age so sadly that's all the reach I will now have but I am lucky to at least have that.With the 500 I have a 2.0x TC all too often fitted and that is very restrictive for focus points although the IQ is excellent. OK, you loose a bit of reach with a 1.4 on the 600mm but the lens will be much more responsive and  you have all the focus points to switch to.You made a good choice. Enjoy. I can sense your anticipation waiting for the delivery but all good things come to those who wait!!!</blockquote>