Originally posted by Adam Having used it for several weeks I'd say it's too heavy for general use. You need a tripod.
Also, compared to newer FF bodies, its high-iso performance isn't up to par.
it's as heavy as a canon 1dx...not more not less...the fact that is big is alas a plus for shooting sat low speed...there are many myth about pentax 645d.
and i used the 645d for a year even for street and editorial shooting. in addiction i find i can easily shoot even at low speed with good sharpness. the fax that is made like a brick help a lot with ha
while not on par with the modern dslr, the iso 1600 is very good...downscaled a bit and cleaned create stunning 20 million images.
i used the camera to create portrait in these days during the Ukrain revolution in kiev. I love the character of the image much more than d800 or any other dslr.