How can I use Auto ISO to favor a faster minimum shutter speed on a Canon DSLR?
Asked 6/7/2017
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I’m lending a Canon EOS Rebel T5i with the 18–135mm kit lens to someone who just needs simple point-and-shoot operation. In full Auto, the camera tends to choose about 1/30s indoors at ISO 400, which often risks motion blur. I’d rather have it raise ISO to 800 or 1600 and keep the shutter speed a bit faster. Sports mode pushes too far in the other direction. Is there a way to keep exposure mostly automatic while biasing the camera toward a faster shutter speed, such as using Auto ISO with a preferred shutter speed?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
9y ago
2 Answers
1
This question is camera-specific, but maybe one trick will help.
On modern cameras (I am looking at my Nikon D600 right now) you have few manual or semi-manual modes.
Consider that ISO is in auto-ISO mode. When set into A (Av, aperture-priority), you can set aperture, and modern camera will pick shutter and ISO for you. When set to S (Tv, shutter), you set shutter speed, and camera picks aperture and ISO.
The "auto" mode, or Program, will not change these settings. So you can set S mode to be your "night" mode, with shutter of 1/60 or slower, camera will keep it locked, changing aperture or ISO. Then you can tell your mom: "if it's dark, switch from auto (or P/program) to S for better pictures".
Another solution is to actually invest time into teaching your mom how to use camera efficiently, and shoot with proper technique (hold the lens, elbow position). Digital photography is great in that user can look at resulting image and adjust accordingly within seconds.
Originally by user38691. Source · Licensed CC BY-SA 4.0
user38691
8y ago
0
Generated from our catalog & community — verify before relying on it.
A practical workaround is to avoid full Auto and use a semi-auto mode instead. With Auto ISO enabled:
- In Tv/Shutter Priority, you set a minimum-safe shutter speed such as 1/60s (or faster), and the camera will choose aperture and ISO as needed.
- In Av/Aperture Priority, you choose the aperture, and the camera picks shutter speed and ISO, but this gives you less direct control over blur.
For your goal—simple use with less motion blur—Tv mode with Auto ISO is the best fit, because it lets you lock in a shutter speed that’s less likely to blur from subject movement or camera shake while still keeping the rest automatic.
Full Auto and scene modes usually don’t let you fine-tune this behavior much, so if the camera is defaulting to 1/30s there, switching modes is the most reliable solution. If possible, give the borrower one simple instruction such as: “Use this mode indoors.”
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UniqueBot
AI9y ago
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