PanoTools:
Re: Full frame or 1.6 crop sensor, which is better?
tflyfish2002 2006-Feb-25 21:02:14
You make a interesting arguement, but I will let you know more next
week when my 1Ds has shown up. One factor to consider it the image
circle from a fisheye is larger on the fullframe and covers more
pixels than the croped sensor cameras, yes the sweet spot might be the
same on both, but lets see with some practical tests. IN the DPREview
of the orginal 1Ds the resolution of the camera was so high the ISO
chart that they were using could hardly record it. If you look at the
image samples that they publish, the 1Ds seems to be better than the
much newer 5D. I have had great results with my now sold 20D and the
Sigma 8mm. My dream is to find a Nikon 8mm that I can use with it.
Still, lens resolution is the least of my problems, after all we only
show 360 pano's on a screen that is 96dpi at the most. Different if
you want to make prints of course. But how high do you really need it?
Antialiasing is the bigger problem IMHO when the panos are shown in a
viewer. The newer antialiasing filters seem to be helping.
Just my 2 cents worth.
Bazzer
-- In #removed#, "Mark S Karpo" <mark@...> wrote:
>
> I want the best Image Quality (IQ) for spherical panos and mosaics.
> Which is better, a full frame or 1.6 crop sensor and what are the
> tradeoffs?
>
> Currently, I use a Canon 300D (1.6 crop sensor) on Nodal Ninja with
> various lenses (15mm fish to 200mm), PTGui, Photoshop, etc. I have a
> Canon 5D (full frame sensor) on order and will compare to my 300D
> soon, but what should I expect?
>
> I expect BETTER IQ from the 300D than the 5D, for the following
> reasons. The resolution of a digital pano or mosaic is determined
> solely by lens focal length and sensor pixel density, and not sensor
> size, right? The 5D & 300D have similar sensor density, so at any
> given lens focal length they should have the same resolution, with
> the 300D taking a crop of the 5D image. However, I expect overall
> pano IQ to be BETTER on the 300D than the 5D because the 300D uses
> the sweet center of the lens (even pro quality lenses are better in
> the center, right?), thus each individual 300D image will have
> sharper corners, less distortion, better stitching, and ultimately
> better pano IQ, than its 5D counterpart images. The expected
> tradeoff is the 300D will require 1.6 times as many shots as the 5D
> to cover the same angular area. However, the extra time to take 1.6
> times extra shots is worth it if it results in better IQ and saves
> me $3,000 for the 5D. Your thoughts?
>
> One other qestion I have is which lens is better for pano/mosaic IQ,
> a 15mm fish or a wide rectangular zoom like the Sigma 10-22 or 12-
> 24? Any thoughts on this?
>
> Mark K.
>
> P.S. I've tested my 300D against other 1.6 crop sensors by taking
> test pictures and pixel peeping. I returned them all. The Nikon D200
> is faster and more ergonomic, but a little noisier so IQ is not
> quite as good as the 300D. The Canon 20D is faster and has less
> noise and thus has a bit better IQ over my 300D, not enough to
> upgrade though. The Canon 350XT is noisier and it's too small. Which
> raises one more question, what new sensor/camera, if any, will be
> coming in the future that will significantly increase pano IQ over
> my existing 300D? Many thanks.
>
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