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Message: <blockquote data-quote="aroy" data-source="post: 283859" data-attributes="member: 16090">If you need a long lense, then get the 300mm F4. What you get is. Sharp 300mm on FX and 450mm of DX, wide open.. One stop less than the zoom.. The price differential is  900 vs 1500, but street price is much less.. With TC 1.4 you will have 420mm on FX and 600mm+ on DX, with hardly any loss in quality. The zoom is soft at 300, so forget a TC with it.In my opinion, the long end of zooms are always softer, so if you need the reach, spend some more and get a prime. As most of the primes are faster than the zooms at longer end, you gain in low light performance.</blockquote>