Focal Length

[Mikey-2u]

Someone mentioned that a 24/70 lens has effectively a longer focal length on a 10d - Is this true?

[ChrisNardone]

10D has what some call a magnification factor. Others call it a crop factor. If you have a 24mm lens on your 10D and take a picture from a given distance, your image would look like a 38.4mm lens on a standard 35mm film camera. The factor is 1.6. This is because the CMOS sensor is 1.6 times smaller than a 35mm film frame.

[Belmondo]

This subject has been discussed at great length many times. Here's one interesting discussion that took place a couple months ago.

http://photography-on-the.net/forum/showthread.php?t=18793&page=0

Good luck.

Tom

[CyberDyneSystems]

NOOOOOOOOOOO!!!!!!

Don't get us started!!!!!

:D :D :D :D

Thye short answer,.. to get the appropriate Feild of view,.. muliply the lenses stated focal length times 1.6.... this will give you the 10D's feild of view/foal length relative to a 35mm film plane :)

[EXA1a]

CyberDyneSystems wrote:
NOOOOOOOOOOO!!!!!!

Don't get us started!!!!!

:D :D :D :D

Thye short answer,.. to get the appropriate Feild of view,.. muliply the lenses stated focal length times 1.6.... this will give you the 10D's feild of view/foal length relative to a 35mm film plane :)
What is "feild" and "foal"?

--Jens--
(Sorry, couldn't hold back ;-)

[samdring]

Aw come on Jens, one has to determine the foal length before you can work out whether or not your fieild will hold all your horses

[RichardtheSane]

And remember with your fieild of view must be good otherwise you will need a better fence to leep the foal and all of it's lengh in! :D