Attempted astro with eos m + 22mm lens but frame flashed red and won't take shot

Started 10 months ago | Questions thread
PhotoTeach2 Senior Member • Posts: 9,404
3 + 3 + 3

Astro must be done in manual mode, (both exposure and focus).

Typical exposures are ISO-3200 @ f/2.8(3) @ 30-seconds. (I remember it as 3+3+3)

But since longer than 15-seconds can show "trails", I suggest using f/2 lens or ISO-6400 @ 15-seconds.

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