I have a Canon Powershot A570 IS. Today I took it out to take some pictures of the creek, where I noticed there was something wrong with my Tv (shutter) mode. Anytime I take a picture in this mode the result is just a bright white picture. I thought it was just overexposure since it was bright out, but when I brought it into a shaded/dark area it had the same result. Other modes seemed to work just fine.
Is this simply a result of it being too bright out, so it's capturing too much light even in a 1 sec. time lapse, or is there a setting I need to adjust for it to work? It was working fine just yesterday an and this is the first time I've had this problem
2007-12-11 07:27:59 · 5 answers · asked by ? 3 in Arts & Humanities ➔ Visual Arts ➔ Photography
One second is going to be overexposed in just about any kind of daylight situation, inside or, especially, outside. More so at higher ISOs.
Keep experimenting. Doesn't sound like anything is wrong.
2007-12-11 07:34:13 · answer #1 · answered by Mere Mortal 7 · 0⤊ 0⤋
Tv (or shutter priority mode) is not an automatic mode. You set the shutter speed you want, and the aperture (which also controls exposure) is chosen automatically to try to make a correct exposure according to the camera's meter. If a shutter speed (such as 1 second) is chosen that let's in too much light the camera may not be able to compensate enough for this even by setting the smallest possible aperture, resulting in over-exposure.
Try adjusting the shutter speed to something a little faster like 1/60th of a second when you're in Tv mode. You're ISO will also have an effect on the exposure. Setting it lower will make it less likely to over-expose.
2007-12-11 15:46:49 · answer #2 · answered by Andreas A 2 · 0⤊ 0⤋
In shutter mode the camera sets an f-stop to make a correct exposure. If it "runs out" of f-stops, i.e., it reaches the largest or smallest f-stop an exposure error usually results.
For a long exposure you should be in Manual Mode so you can be in control. Try this experiment and see if it helps.
Set your ISO at 100. Set your camera to Aperture Preferred and let it recommend a shutter speed. Write that down.
Suppose you choose f4 and the camera selects a shutter speed of 1/125. However, you want a slower shutter speed. You can make a chart:
1/125 @ f4
1/60 @ f5.6
1/30 @ f8
1/15 @ f11
1/8 @ f16
At an ISO of 50 your slowest shutter speed would be 1/4 @ f16.
Please note that the above examples are purely hypothetical and are to illustrate the f-stop/shutter speed relationship.
2007-12-11 16:04:28 · answer #3 · answered by EDWIN 7 · 0⤊ 0⤋
It's possile with some cameras to adjust the aperture and/or the iso even when using shutter priority to compensate for low or high lighting conditions...I don't know if that is a feature on the A570 but you could take a look at it and see if you accidentally did this. Is there a way to "restore factory settings"?
2007-12-11 16:26:18 · answer #4 · answered by Dawg 5 · 0⤊ 0⤋
If I'm understanding you correctly, you can't get a proper exposure in Tv mode no matter what shutter speed you choose.
In this case there is definitely some issue with the camera. Call the Canon dealer nearest you.
Hope this helps.
2007-12-12 00:21:59 · answer #5 · answered by V2K1 6 · 0⤊ 0⤋