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

Thread Tools Search this Thread
Old Mar 4, 2004, 4:07 PM   #11
Join Date: Jan 2004
Posts: 89

The button causes the lens iris to close down to the aperture the shot you're composing will be fired at so, in theory, you can asses the depth of field by looking at what looks like its in focus on the focusing screen.

Well fine but on the 300D at least the focus screen is quite small and it's not easy to make out what's going on.

The reason it gets dimmer is - the iris closed down so less light gets in!!

If it doesn't get dimimer, you've a wide aperture set and the iris isn't going to close up much - if at all - either during the shot or during preview.
ccomley is offline   Reply With Quote

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 6:02 AM.