Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Canon EOS dSLR

Reply
 
Thread Tools Search this Thread
Old Feb 26, 2004, 3:49 AM   #1
Junior Member
 
Join Date: Feb 2004
Posts: 10
Default Does the 1.6 factor go for all lenses?

Hi

Does anyone know whether the 1.6 x factor goes for every lens to the 300D - or just the new EF-S lens?

Is it so that every EF lens should be multiplied with 1.6 making a 28-200 into 44-320?

Thanks

Morten
MortenJensen is offline   Reply With Quote
Sponsored Links
Old Feb 26, 2004, 4:22 AM   #2
Senior Member
 
Marc H's Avatar
 
Join Date: Dec 2003
Posts: 130
Default

Yes, thats correct.

The multiplier is a "feature" of the camera, not the lens.
Marc H is offline   Reply With Quote
Old Feb 26, 2004, 4:17 PM   #3
Member
 
Join Date: Jan 2004
Posts: 89
Default

Applies to all lenses.

Because it's a function of the camera, not a fancy feature of the lens.

It's because the CMOS image sensor in the back of the digital camera is smaller than the frame of a 35mm film.

Think of it, if you like, as taking a 35mm shot, printing it, then cutting a strip off all four edges of the print, then blowing what's left up as your final print. Or a permanent "zoomed in a bit more" factor.

Whatever lens you use, only that middle rectangle of the "Normal" image ends up captured by the CMOS.

Sensors get bigger - there are already D-SLRs with "full size" sensors (e.g. same size as a 35mm film frame) so the lens "factor" for those is 1:1.
ccomley is offline   Reply With Quote
Old Feb 26, 2004, 7:55 PM   #4
Senior Member
 
Join Date: Dec 2003
Posts: 383
Default

here is a great link which does a very good job of explaining this:

http://www.marius.org/fom-serve/cache/53.html
PKchopper is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 2:10 AM.