Godfrey DiGiorgi wrote:
On Oct 20, 2005, at 11:22 AM, Mark Roberts wrote:
I haven't used any DA lenses myself, but several others have reported
that they cover more than the APS-C area, enough for full-frame,
in some
cases. And Canon seems to do fine selling DSLR's that don't work with
their reduced-image-circle lenses.
Canon's EF-S lenses don't mount on the 1.3x and 1x crop factor format
cameras.
That's my point.
Ah, I thought you meant in the Pentax model ... the DA lenses will
mount and function on any K mount body, but they won't cover the
format in all cases. FA and earlier lenses will all mount and cover
16x24mm format.
Canon EF-S lenses will only physically mount on EF-S compatible
bodies (300D, 20D, 350XT), EF lenses will mount on all bodies.
Urgh. I'd say the Pentax way is better. If and when they release an FF
body, you'll probably still be able to use the DA lenses on it to
produce (at least) the 6MP APS-C sized images the lenses were designed for.
BTW: the Pentax DA14 will cover a 24x24mm format, max.
I'm not 100% sure I'm looking at this the right way, but I think that
means it's able to cover up to approximately 18.5x28mm in the 2:3
format. That's more or less equivalent to a 1.3 crop!
I've been wondering, could the fact that the DA lenses do seem to have a
somewhat larger circle than what's strictly required by the APS-C sized
sensor, actually be a result of a conscious design decision, i.e. might
Pentax have left some room for a possible development towards larger
sensors?
I'm planning a little project using it on the MX body, where it will
be a fixed f/22 lens with 81x81x100 degree HxVxD field of view.
That's sufficiently more vertical FoV than a 20mm lens... Should be fun.
