Canon EOS Digital Rebel XT / Discuss

Izabug says:

the IS is going to help you a lot with that.
Posted 78 months ago. (permalink)

Mike Cohn    says:

Yes, I understand that the IS gives you 2 - 3 stops improvement. I just don't know what a safe limit on shutter speed is.
Posted 78 months ago. (permalink)

VincenzoF [deleted] says:

This should help:

The rule for stable image quality is: use a shutter speed faster than the focal length of the lens. On zoom lenses, set the speed for the maximum focal length (200mm for an 80~200mm zoom, 35mm for a 17~35mm zoom). For simplicity, I’ll give whole-stop examples. Third stops could be an obvious choice for those using professional cameras with digital fractional settings. Use the rule above to find the correct third stop for the lens focal length.

35mm = 1/60
100mm = 1/125
200mm = 1/250
300mm = 1/500
600mm = 1/1000

Mike Cohn    says:

VincenzoF, thanks so much. That's exactly what I was looking for. The article doesn't say anything about image stabilized lenses so I assume I could push the shutter speeds by a couple of stops if needed.
Posted 78 months ago. (permalink)

VincenzoF [deleted] says:

Probably... I did find that the rule works pretty well. I have a 100-300 handheld w/o IS and using their rules, I don't end up with shaky images so it's definitely up there.
Posted 78 months ago. (permalink)

sosidesc    says:

keep in mind though that even with IS the subject will still be blury at slow shutter speeds if moving. IS won't help this.
Posted 78 months ago. (permalink)

AndrewKantor says:

Ah, but ain't the beauty of digital that you can go out and experiment by shooting 100 photos and seeing the results in minutes (and free)? :-)

I was pondering a lighting question one night and then did the V-8, smack-myself thing. Why think when you can 'xperiment?
Posted 77 months ago. (permalink)

@kevinv033    says:

@Andrew:

indeed! that is part of the beauty of digital :)
Posted 77 months ago. (permalink)

Sam Haque    says:

the-digital-picture.com guy has shot 1/3 sec handheld without any problem with this 17-85 lens.
the-digital-picture.com/Pictures/Picture.aspx?Picture=200...
Posted 77 months ago. (permalink)

code poet    says:

Another trick is to set the drive mode to continuous and grab several exposures in a row - one of them is bound to be in focus.
Posted 77 months ago. (permalink)

GROGG    says:

Always on that I tend to forget, code poet makes a good point that is simple and sometimes forgotton.

I'll say one thing for IS/OS, it really, really helps out here. I've a steady enough hand already (I think) but I can safely say that the reviews got it spot on, about 2 stops down, nice one.
If anyone is thinking of getting one and want to REDUCE tripod usage, no not hesitate.
Using the Sigma 80-400mm OS EX APO DG.

My 2 cents.
Posted 77 months ago. (permalink)

fujiyama17    says:

I just bought a Rebel XT myself, and I was under the impression that the ISO helps, but is granular on higher numbers. Is there some IS setting on the XT that I am just missing? This might be a dumb question. Thanks for your help!
Originally posted 76 months ago. (permalink)
fujiyama17 edited this topic 76 months ago.

Green Putty In My Armpit    says:

Actually, I don't think ISO helps in improving image sharpness. But it does allow you to use a faster shutter speed for the same exposure which helps.

The IS setting is not on the XT but on the type of lens.
Posted 76 months ago. (permalink)