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mark-rtoday at 12:13 PM4 repliesview on HN

I'm not aware of a digital camera that can take a 10 minute continuous exposure, but maybe there are special astronomy cameras that can?


Replies

nayukitoday at 2:49 PM

Pretty much every DSLR/DSLM camera out there has a "bulb" mode that keeps the shutter open as long as you hold down the shutter button. I think my personal record is a 20-minute exposure.

As for actually holding down the button, you can either use an external wired shutter button that has a mechanical lock to hold it down, or you use a wired controller that has an electronic timer, or you use a software feature in the camera to set the bulb timer.

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AntiUSAbahtoday at 3:02 PM

My Canon can do this without modification and its 8 years old. Switch to bulp and have an external mini device which you connect with a microphone cable and it creates the signal for shutter off after x minutes.

For extra long exposre its recommended to use also a stable powersource.

zimpenfishtoday at 2:10 PM

Do iPhones count?

I've taken multi-hour continuous exposures on my iPhone + iPad (both "normal" and "light trail" variants.)

By the looks of [0], you can do at least 90 seconds on the Olympus E-M5 MK II - which is what I have and I'll see if it can do 10 minutes tonight.

[0] https://www.olympuspassion.com/2019/08/26/long-exposures-wit...