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Message: <blockquote data-quote="etudiant" data-source="post: 3341638" data-attributes="member: 48052">These big DX and FX cameras do offer superior optical performance, albeit at a huge cost in size and money. They really are professional tools, appealing perhaps also to enthusiasts with deep pockets (and strong backs, to carry the massive tripods these things require). The smaller 4/3rds or 1" sensor based cameras do almost as well, but are much more handy and cheaper. For ordinary mortals, birders who travel in steerage with limited baggage allowance, they are much more relevant. The camera industry is really stepping up their offerings in this space, with new 4/3rds lenses from Olympus and Panasonic/Leica addressing the 600-800mm equivalent telephoto market.</blockquote>