Comparing APS-C and Fullframe Sensors

#1 GARY POGODA

I think Bob made the wrong choice of test methods. He should have
used test method #1, namely, testing the cameras with comparable
lenses designed specifically for full-frame and APS-C sensors. If he
had, the vignetting tests would not have been so skewed.

4:45 pm - Tuesday, February 7, 2006

#2 nick in japan

IMHO, the test reinforced a few of my feelings, for MY money, the 20/10D do a wonderful job, no need to step-up. I'm glad I bought a back-up 22-55 before they were discontinued. Also, I feel that the 50mm 1.8 is alot better than "Good", lottsa pros use it!

2:45 am - Wednesday, February 8, 2006

#3 GARY POGODA

I would have agreed with you about no need to upgrade to the 5D,
until I saw some of Mark's photos at his new Everyday Eye website.
Incredibly tight DOF to produce amazing bokeh.

This one in particular.

http://www.everydayeye.com/index.php?showimage=9

4:59 pm - Wednesday, February 8, 2006

#4 nick in japan

Easy to do with either camera mentioned, we are talking lens quality and build stats as primary contributing factors to proper bokeh, the noiseless 10/20D sensors contribute smooth, pleasant images, world-wide, by countless photographers.
Unless huge prints are required, and huge numbers of images are taken on a routine basis, up-grading to the 5D or one of the very expensive pro-level cameras is, IMHO, just a waste of money for we amateurs.

9:27 pm - Wednesday, February 8, 2006

#5 GARY POGODA

But did you see how the dragon was in perfect focus, and just a few
inches beyond that was already out of focus, and a few more inches
was really out of focus? To me, that spells full-frame sensor.

9:57 pm - Wednesday, February 8, 2006

#6 nick in japan

That spells "Fast Lens" to me, bokeh is the "Quality" of the out of focus area, directly related to the lens and it's settings, construction. Mirror lenses distroy quality bokeh with the donut problem( in some cases). Adapters, extensions and filters all factor in, sensor size affects noise, APS CMOS, and larger, is not a bokeh factor, IMHO.

11:54 pm - Wednesday, February 8, 2006

#7 GARY POGODA

Nick, DOF is inversely proportional to image sensor size and directly
proportional to f-stop (or, as you indicated, inversely proportional to
lens speed). So ALL OTHER THINGS BEING EQUAL, full-frame image
sensors will be capable of producing better bokeh than APS-C.

10:53 am - Thursday, February 9, 2006

#8 nick in japan

I believe your math, I have had no problem with the Canons, so, I think the loss is more a reality on paper than in the field, maybe! I need to do some tests to expand on this discussion. I have a new model, I'll be shooting a serious shoot as soon as the weather breaks, I will do some tests with my fastest lenses and report back to you!

11:03 am - Thursday, February 9, 2006

#9 GARY POGODA

That will be interesting to see.

BTW, just so there is no circle of confusion, in comment #7, by larger
f-stop, I mean a larger f-stop number (or a smaller aperture, which in
some circles is also referred to as a smaller f-stop).

12:15 pm - Thursday, February 9, 2006

#10 nick in japan

Which is a whole new topic of discussion, because some folks believe that the quality of the image is proportional to the aperture size! Naw! let's not go there!
I do have another question for you, where are you writing from? I get all kinds of indicators that you are in England, then America, I can't figure it out!

1:14 pm - Thursday, February 9, 2006

#11 GARY POGODA

Nick, looking back on your comment #6, I see now you were referring
to the "quality" of the out-of-focus area and I was referring to quantity.
I totally agree, the quality is related to the lens factors you mentioned.
I should've know better than to argue with a guy from Japan about the
Japanese art of bokeh.

5:50 pm - Monday, February 13, 2006