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Lads, I'm really enjoying birding while out on walks, but I'm not enjoying cropping the shit out of photos taken even with my cheap old 75-300.
Gonna be getting a windfall in a couple of weeks and am thinking of spending it on a longer lens, thinking of the 150-600mm 5.6-6.3f by either Tamron or Sigma, or the first generation 100-400mm f/4.5-5.6L IS USM off Ebay.
Would 400 be an appreciable increase in reach or should I just go all out on 600?