Originally posted by gosman But does it defeat the purpose of a small crop sensor camera when the lens weighs as much as the camera body?
which is why I continue to use a D800 for most of my shooting under 90mm.
I mean, there is very little out there that is better than a 24-70mm + D800.
And once you add the Sigma f/1.8 to your K-3 with grip, you are coming darn close to the total size/weight of the 24-70mm + D800 -- so what's the point?
However, once you get into long lenses, my opinion is that crop sensors are superior when you take into account size/weight/sharpness factors.
Having shot with Canon 100-400mm and Nikkor 80-400mm lenses, I found them both wanting (and ridiculously heavy and clumsy to operate).
I couldn't be more satisfied with my Pentax 60-250mm + K-3 -- Nikon and Canon can eat their hearts out.
YMMV
Michael