What are the drawbacks of using a manual flash on-camera instead of a TTL flash?
Asked 10/18/2011
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I’ve confirmed that a manual flash like the LumoPro LP160 will fire on-camera with a Pentax K-x. Beyond the lack of TTL, what are the main downsides of using a manual-only flash on the hot shoe? I’m especially wondering how practical it is for fast-moving or changing scenes, and whether most photographers still prefer flashes that offer both manual and automatic modes.
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
14y ago
2 Answers
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Automatic modes are for when you want convenience and fast setup; manual mode is for when you need precision and repeatability. Therefore, automatic modes are preferred when moving around, the scene is dynamic or you don't have time to tweak the lighting; manual mode is more suitable for studio or location setups.
Having a manual flash on-camera vs. having it off-camera means you cannot do anything else neither with your hot shoe (e.g. radio trigger transmitter) nor with your pop-up flash (e.g. fill light).
Having a manual flash on-camera vs. having a more advanced flash on-camera means you are missing out on all the advanced features depending on data communication with camera, like TTL metering, high-speed sync, rear curtain sync or automatic zoom of flash head.
Originally by user4390. Source · Licensed CC BY-SA 4.0
user4390
14y ago
0
Generated from our catalog & community — verify before relying on it.
Yes, a manual flash can be used on-camera, but the main tradeoff is speed and convenience.
Manual flash works best when the setup is controlled and repeatable, because you set flash power yourself and keep it consistent. That makes it useful for studio or staged lighting, and manual mode is also commonly used off-camera for precise, repeatable results.
The downsides of a manual-only flash on-camera are:
- no TTL auto-exposure, so you must adjust flash power yourself
- slower operation when subjects, distance, or ambient light change
- less practical for quick shooting or dynamic scenes
- you may lose advanced camera/flash features that depend on communication with the camera, such as high-speed sync, rear-curtain sync, and automatic flash-head zoom
- using the hot shoe for the flash means you can’t use it at the same time for something else like a radio trigger transmitter
So yes: many photographers value a flash that offers both TTL/automatic modes and manual control. Automatic modes are better for fast, changing situations; manual modes are preferred when precision and repeatability matter more.
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