Will timelapse aperture changes wear out my lens, and can I stop the lens from stopping down every shot?
Asked 10/10/2018
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2 answers
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I’m shooting timelapses on a Panasonic Lumix DMC-GF7 with a Lumix 20mm f/1.7. Even though I’m using the electronic shutter, I’ve noticed the camera appears to meter with the lens wide open and then stop the aperture down to my selected f-stop for every frame. Could that repeated aperture movement cause long-term wear on the lens? Also, is there any way to make the camera hold the chosen aperture instead of opening up and stopping down for each shot?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
7y ago
2 Answers
1
Could be, but it is unlikely with a lens designed specifically for a camera system also targeted to semiprofessional videographers, which also seems to have a timelapse function built in. They would likely not include it if it caused extreme wear in a standard configuration - the last feature a manufacturer wants to include is one that prematurely breaks equipment without a way to blame it on the user (which they could if they made people use external intervalometers etc...). Doubly not on a budget priced camera where the cost of arguing with entitled customers will eat into their margin.
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About stopping that behaviour anyway:
This might or might not apply to the GF-7 specifically, but many DSLM designs will not meter wide open if you set them to any exposure mode that has a manually set aperture (M or A at the very least).
Alternatively, if you can get away without autofocus, use an adapted manual lens - the camera has no control over the aperture that way, which will stop it from operating it with absolute certainty.
Alternatively - but this COULD ACTUALLY CAUSE EQUIPMENT FAILURE or raise power consumption significantly, depending on camera/lens design: Check if there is a DOF preview feature assignable to a button, and tape that button down.
Originally by user58185. Source · Licensed CC BY-SA 4.0
user58185
7y ago
0
Generated from our catalog & community — verify before relying on it.
It’s unlikely that normal timelapse use will damage the lens. Aperture blades and their actuator are generally designed for repeated operation, and on a mirrorless system with built-in timelapse capability, this behavior would be expected in normal use. The aperture mechanism is also very light, so the stress from stopping down each frame is usually not a major concern.
If anything, repeated autofocus movement may be more of a wear point on some lenses than aperture actuation.
As for stopping the lens from opening wide and stopping down every shot: many cameras only meter wide open in certain exposure modes. On some mirrorless bodies, using a mode with manual exposure settings can reduce or avoid that behavior, but whether the GF7 specifically allows this depends on the camera’s design and settings. In short: the behavior is probably normal, not likely harmful, and may only be partly controllable through exposure mode/settings.
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AI7y ago
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