BetterPhoto Q&A
Category: How Digital Camera Equipment Works

Photography Question 

woody woodward
 

Kit Lenses for Digital Rebel


I've been told with other lenses, I have to take the focal length times 1.6 (I think) to determine what my lens sees. Now, if the kit lens was made specifically for the Rebel, is 18mm really 18mm or is it 18mm X 1.6? I know this is probably clear as mud, but that shows just how little I know. Thanks for any guidance.


To love this question, log in above
August 02, 2004

 

Jon Close
  The EF-S 18-55 is made specifically and exclusively for the Digital Rebel. Nevertheless, the same cropping factor applies. 18mm focal length is 18mm focal length, regardless of the camera format. But because the digital sensor is smaller than the 35mm film frame, the angle of view of 18mm on a Digital Rebel will be equivalent to 29mm (18 x 1.6) on a 35mm film camera.


To love this comment, log in above
August 02, 2004

 

woody woodward
  awllll poop. Thanks Jon! Maybe someday I can afford a camera with a bigger sensor.


To love this comment, log in above
August 02, 2004

 

Steven Chaitoff
  Woody, kits typically include a lens that has a small max aperture and a pretty standard focal length like 28-90, because they are inexpensive to manufacture and are good "starter" lens. Anyway, because of the crop factor, Canon purposely uses a shorter focal length range (18-55), so the effective length becomes 28.8-88, which is quite close to an ideal standard of 28-90.


To love this comment, log in above
August 02, 2004

 

woody woodward
  Thanks for the added info Steven. Explains the f/3.5. I certainly like that.


To love this comment, log in above
August 02, 2004

 
This old forum is now archived. Use improved Forum here

Report this Thread