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08/25/2005 10:02:04 AM · #1 |
I have noticed that a few people have mentioned that they have IS cameras but turn the IS off in situations where they don't find it is needed. I have read that aside from LONG exposure shots, it's really not much of an issue.
Also, does anyone know how long of a shot it would need to be before quality dropped at even a lowish level? I need to do all I can to keep my quality up on low light shots.
I can't think of any reason for this myself. A pic at 1/800 is going to stop most motion pretty well, even sensor motion.
PS. I use my camera with the IS on Shoot only because I had heard that it is more accurate. I would put that down to it being centered at the beginning of the shot, therefore likely having more range of motion or perhaps a more accurate algorithm when 0=0 as opposed to when 0=12 or something. I know it sounds trivial, but there's probably a few logarithmic functions in there somewhere that might get thrown off just a hair... ?
Thanks. |
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08/25/2005 10:42:28 AM · #2 |
Originally posted by eschelar:
...Also, does anyone know how long of a shot it would need to be before quality dropped at even a lowish level? I need to do all I can to keep my quality up on low light shots. |
The general rule for (non-IS) photography is that the slowest shutter speed to avoid camera shake is about 1/FL, where FL is the "35mm equivalent focal length". So for a "50mm" type field of view, the R.O.T. sez you should shoot at 1/50s or faster. That does not take into account subject motion. For sports, you may still get some subject motion blur at 1/500s, for instance. IS won't help there.
IS can be "fooled" by intentional camera motion (panning with a subject). The IS system tries to compensate for the motion, and you wind up with something worse than no IS at all.
When shooting on a tripod, older-generation and less sophisticated IS systems sometimes will not work right. I don't think your cam would have this problem, but you should check your manual for recommendations as to whether to turn of IS when the cam is on a tripod.
All considered, I'd turn IS off only in those situations where you know it may cause more problems that it fixes, but leave it on otherwise. That's what I do with my IS lens.
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08/25/2005 10:48:33 AM · #3 |
Thanks kirbic. My cam actually has a panning mode for IS as well.
I was thinking more particularly about tripods as I didn't notice anything in my manual about tripods this time through.
Incidentally, I found that the manual for my Powershot S30 was more in-depth than the S2's manual.
Not that it matters of course... |
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08/25/2005 10:54:42 AM · #4 |
Interesting...
If the manual doesn't cover the tripod question, I' guess it's not a concern, but easy to test. Shoot a detailed landscape on a tripod with and without IS, at a relatively low shutter speed, say around 1/15 second. Use a remote or the timer. Take several shots with IS on, and at least on with it off. Compare sharpness. If the IS shots vary in sharpness and/or are less sharp than the non-IS shot(s), you have your answer.
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08/25/2005 10:55:24 AM · #5 |
| I have an IS camera as well and tend to shoot without it. Only when using large zooms do I turn it on, and then again, only if shooting handheld. I think it tends to add a bit of blur to the shots... but maybe your IS is better than mine, being a "version 2" of the same cam... I dunno... |
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08/25/2005 11:03:05 AM · #6 |
Darn it, I think I just leave mine on and don't think about. Now I have another setting to remember : (
Taking a photo is starting to sound too much like a NASA liftoff:
"ISO Setting?"
"Check"
"Aperture setting?"
"Check"
...
(28 settings later)
"Roger -- Canon, we are cleared for shutter-release in Five, Four, Three, ..." |
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08/25/2005 11:57:34 AM · #7 |
Originally posted by GeneralE:
Darn it, I think I just leave mine on and don't think about. Now I have another setting to remember : (
Taking a photo is starting to sound too much like a NASA liftoff:
"ISO Setting?"
"Check"
"Aperture setting?"
"Check"
...
(28 settings later)
"Roger -- Canon, we are cleared for shutter-release in Five, Four, Three, ..." |
lol, I feel just like that... but it's fun anyway! |
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08/25/2005 01:21:25 PM · #8 |
Originally posted by GeneralE:
Darn it, I think I just leave mine on and don't think about. Now I have another setting to remember : (
Taking a photo is starting to sound too much like a NASA liftoff:
"ISO Setting?"
"Check"
"Aperture setting?"
"Check"
...
(28 settings later)
"Roger -- Canon, we are cleared for shutter-release in Five, Four, Three, ..." |
My dad had a Leica he got just after WWII. The exposure meter was an external one, and all he had was a 50mm lens.
I'd say you have it easy :-) |
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08/25/2005 01:24:57 PM · #9 |
Originally posted by GeneralE:
Darn it, I think I just leave mine on and don't think about. Now I have another setting to remember : (
Taking a photo is starting to sound too much like a NASA liftoff:
"ISO Setting?"
"Check"
"Aperture setting?"
"Check"
...
(28 settings later)
"Roger -- Canon, we are cleared for shutter-release in Five, Four, Three, ..." |
flash.. flash.. flash.. flash.. flash.. flash.. |
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08/25/2005 02:04:55 PM · #10 |
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08/25/2005 02:14:05 PM · #11 |
Canon's name (image stabilization), a technology for those lenses that have it to reduce blur from camera shake at low shutter speeds or when using extreme focal lengths that amplify camera shake. Nikon's version is called VR (vibration reduction) and Konica-Minolta cameras have it built into the camera, so that the sensor moves in conjunction with camera movement to minimize blur.
Originally posted by NathanW:
"IS"??? What's that? |
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08/25/2005 02:15:36 PM · #12 |
| Ah, in other words I probably don't have that kind of feature on my little camera. Bummer. |
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08/25/2005 02:21:48 PM · #13 |
Originally posted by GeneralE:
Darn it, I think I just leave mine on and don't think about. Now I have another setting to remember : (
Taking a photo is starting to sound too much like a NASA liftoff:
"ISO Setting?"
"Check"
"Aperture setting?"
"Check"
...
(28 settings later)
"Roger -- Canon, we are cleared for shutter-release in Five, Four, Three, ..." |
Damn, my lenscap just knocked a few tiles off the side of my camera ;)
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08/25/2005 02:52:44 PM · #14 |
Originally posted by nshapiro:
Originally posted by GeneralE:
Darn it, I think I just leave mine on and don't think about. Now I have another setting to remember : (
Taking a photo is starting to sound too much like a NASA liftoff:
"ISO Setting?"
"Check"
"Aperture setting?"
"Check"
...
(28 settings later)
"Roger -- Canon, we are cleared for shutter-release in Five, Four, Three, ..." |
Damn, my lenscap just knocked a few tiles off the side of my camera ;) |
I hope that doesn't affect re-entry. ;o)
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