[Leica] OT: Another maybe not so stupid GH1 question

[imagist3 at mac.com (George Lottermoser)]

It really is not that complex Vince.
Imagine an 8x10 view camera with a "normal" 300mm lens.
It sits on a hill top overlooking a valley.
You'll see a relatively "normal" view on the ground glass.
Replace the 8x10 back with a 5x7 back.
You'll see a significantly narrower field of view
Replace the 5x7 back with a 4x5 back;
even narrower.
Replace the 4x5 back with a 2 1/4 x 3 1/4 back.
and you're reaching into a very narrow field of view.
Hang a 35 mm camera on the back
and you're focusing on a bird that you didn't even notice
when using the 8x10 back.

With each of those changes in format,
using the same lens and distance from subject,
camera movement will have an ever increasing effect
because the movement will show as a greater proportion of the format.


Regards,
George Lottermoser
george at imagist.com
http://www.imagist.com
http://www.imagist.com/blog
http://www.linkedin.com/in/imagist

On Mar 26, 2010, at 3:13 AM, Vince Passaro wrote:

> nobody really understands this crop
> factor thing in a rational way: