Go Back   Steve's Digicams Forums >

LinkBack Thread Tools Search this Thread
Old Jul 21, 2005, 6:35 AM   #1
Junior Member
acnj's Avatar
Join Date: Feb 2005
Posts: 10

I recently purchased a Canon A510.

One thing that I have noticed is that if I want to increase the aperature opening, I am actually decreasing the shutter speed.

For instance, if I am in a low light situation and lets say that the shutter speed is 1/10 of a second, I say to myself, "well, if I open up the aperature, I will increase the shutter speed which means that there won't be as much camera shake".

Actually, the opposite happens, when I "open the aperature", let's say by 1/3 stop, the shutter speed actually decreases to, let's say 1/6 of a second.

The point is that I am trying to make is that I am a little disappointed by the fact that, apparently, digital camera, at least point and shoots, don't have aperatures. Apparently, when you "open the aperature" all that you are really doing is increasing the shutter speed, which makes that camera more brone to camera shake.

acnj is offline   Reply With Quote
Sponsored Links
Old Jul 21, 2005, 9:19 AM   #2
sedges's Avatar
Join Date: Feb 2005
Posts: 42

You need to put the camera in the manual mode to adjust aperture and shutter speed independently.

In aperture priority you can choose the aperture, but the camera choses the shutter speed according to the conditions it senses.

In shutter priority you can chose the shutter speed and the camera choses the aperture according to conditions.

In the manual mode you have complete control over both. Whats wonderful is that the screen gives you an accurate representation of what the images will be at those settings. Never had that opportunity with a film camera.
sedges is offline   Reply With Quote
Old Jul 21, 2005, 10:25 AM   #3
Senior Member
Tom LaPrise's Avatar
Join Date: Oct 2004
Posts: 324

You sure you're using the aperture adjustment and not exposure compensation? "+1/3" EC would force a third of a stop more exposure, which is what you seem to be getting. The shutter slows down by roughly 1/3 stop.

(If there's an aperture adjustment, it actually has an aperture to adjust...)
Tom LaPrise is offline   Reply With Quote
Old Jul 21, 2005, 5:31 PM   #4
Junior Member
Louddog's Avatar
Join Date: May 2005
Posts: 24

Are you adjusting the aperture the right way? Aperture is backwards.

Higher aperture number = smaller aperture = slower shutter

Lower aperture number = bigger aperture = faster shutter
Louddog 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 On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 5:04 PM.