…because I have facts on my side.
Here is a typical exchange:
Me: You’re smoking something. A 24mm on a D80 is still a 24mm. The FIELD OF VIEW is like a 36mm on your 5D. (link) The issue you are alluding to with wide angles being better on “full frame cameras” is related to something called retrofocal design. (link)
[An explanation after the jump.]
Here is my comment on Scoble’s photo:
The EXIF data is missing. What lens is this?
I really doubt that can only be captured by a “full-frame.” If the lens is rectilinear you can go down to 11mm on an APS-C camera (Tamron on a Nikon, 10mm Canon on a Canon) which is a field of view equivalent of a 16mm lens on your 5D. Is this shot with the 14mm EF lens? Otherwise, I call BS on the guy not being in the frame.
Furthermore if you shot with the 10.5mm Nikkor fisheye on a D40, use Capture and hit the rectilinear button, you’d not only have the guy in the frame, he’d be 1/3 of the way in the frame!
Now if you said, “Well, for him to be in the frame, I wouldn’t have been able to handhold it, he wouldn’t be as sharp, and the noise wouldn’t have been as low,” then I’d agree, because you’d be shooting a 5D which will have a larger aperture at the same pricepoint/angle-of-view.
(No different than saying the 5D is the cheapest digital camera with a 35mm sensor.)
See, that’s penalty of a retrofocal design. You need retrofocus sooner on smaller sensors. In the Canon EF-S system, this is slightly compensated by the extra room they have in the box but only slightly. Which is why the 10-22mm and 16-55mm IS lenses are such great values. (On a personal note, I’d trade the value for the ability to mount it on a full frame camera. But that’s a personal thing—i.e. why I shoot Nikon—and I’ll accept other people feel differently.)
See, I’m not debating you on your choice of the 5D. (I remember when you were asking for advice on twitter and the only thing I did was correct some errors on some of the things people were saying.) The reason was I felt that the 5D was the best camera for you so the general idea was correct. I thought that your preferences as an engineer, given your budget, what you like to shoot, and people you’ll be surrounded with (Hawk and others) made the 5D the obvious preference.
I’m debating on facts. Words like “focal length” mean something because they’re based on science, not preferences. That’s why I tore you apart. Every camera has compromises. I just ask that people not be oblivious to those compromises when they express their brand preferences. 😉
Robert Scoble : tech world :: Ken Rockwell : photography world