Film gates on 35mm aren't always accurate either. "APS-C" sensors are
at least close to 2:3 ratio or 16.7x24.1mm, the Canon 20 uses a ~2:3
ratio sensor with a ~1.3x crop factor APS-H is 30.2x16.7mm or ~16:9
which is not even close.
Adam Maas wrote:
And 1.5x or 1.6x crop sensors aren't even really APS-C. It's a
convenient shorthand that most people use to define the common sensor
sizes. You're picking nits.
-Adam
P. J. Alling wrote:
The Canon D doesn't have and APS-H size sensor. The aspect ratio is
the same as APS-C or 35mm. APS-H is a wider view horizontally.
Adam Maas wrote:
John Forbes wrote:
On Thu, 19 Jan 2006 20:43:17 -0000, Christian
<[EMAIL PROTECTED]> wrote:
Adam Maas wrote:
Nikon is doing 12.4MP in APS-C, that's the sensor in the D2x.
-Adam
Sorry, I always forget about that one. And it is supposed to
have really good noise properties too.
It seems to me that there is no good reason why Samsung, or anybody
else, can't produce a sensor which is half-way in size between
APS-C and 35mm (24x36). This would be about 50% bigger than APS-C
but would still, I think, allow all Pentax DA lenses to be used
without vignetting. Crop factor would be around 1.3.
If Nikon can squeeze excellent results out of an APS-C sensor with
12.4 Mpixels, a 50% bigger sensor should be able to manage
around 18 mpixels, and will make the new 12-24mm zoom equivalent
to 16-31mm on 35mm, which is pretty good.
It would still be considerably cheaper to make than a full-frame
sensor.
That's what I would be aiming to do if I were running
Pentax/Samsung. But of course, I'm not.
JOhn
APS-H, a la Canon 1D and Kodak DCS760.
But there is a major disadvantage. Wide angle lenses lose their
wide, and you can't use any of the 'digital wides' except the
generally poor performing Sigma 12-24 because of coverage problems
as they don't cover APS-H at the wide end. The 1.3x crop size also
is more susceptible to poor edge performance that is avoided with
the APS-C cameras and plagues full-frame (Consumer lenses are
generally unusable on Full Frame cameras because of how apparent
their weaknesses become).
-Adam
--
When you're worried or in doubt,
Run in circles, (scream and shout).
