How can I do exposures longer than 30 seconds, interval shooting, and larger HDR brackets on a Canon 5D Mark III?
Asked 10/28/2012
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I’m using a Canon 5D Mark III and want a non-phone solution for three tasks: 1) exposures longer than 30 seconds, 2) HDR bracketing with more than 3 frames and user-defined spacing, and 3) interval shooting such as one exposure every 30 seconds for several hours. Is there a commercial solution that handles some or all of this?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
13y ago
2 Answers
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Your camera can take exposures that are longer than 30 seconds, this is called Bulb mode. In this mode the exposure lasts for as long as you keep the shutter button pressed. For this kind of photography you might want to use a remote shutter cable, so that you do not have to physically touch the camera and risk moving it during the exposure.
For your other requests, my recommendation is that you wait for Magic Lantern to become available on the Mark III. Magic Lantern is an add-on software that runs along side the Canon firmware and provides many additional features. At the time I'm writing this (October 2012) there is a public alpha release for the 5DmIII. Magic Lantern supports advanced bracketing with unlimited number of shots per bracketed set and also has a very flexible intervalometer module.
Originally by user7604. Source · Licensed CC BY-SA 4.0
user7604
13y ago
0
Generated from our catalog & community — verify before relying on it.
Yes—part of this is built into the camera, and part may need an accessory or add-on firmware.
- For exposures longer than 30 seconds, use Bulb mode. A wired remote/timer release is helpful so you don’t have to hold the shutter button and risk shake.
- For interval shooting, a timer remote such as Canon’s TC-80N3 can handle long exposures in Bulb mode and repeated shots at set intervals.
- For larger HDR brackets with more than 3 frames and flexible spacing, the community answers point to Magic Lantern as the likely solution on the 5D Mark III, since it adds advanced bracketing and intervalometer features.
One answer also notes a workaround for repeated bracketed sets: use the camera’s self-timer with auto exposure bracketing enabled, then use the timer remote to trigger each bracket sequence at your chosen interval.
Be aware that very long exposures can produce significant sensor noise from heat buildup, especially over minutes or longer.
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