Comments on: Sh2-155 https://astrodoc.ca/sh2-155-2024/ Astrodoc.ca - Images of the Universe Mon, 22 Jan 2024 13:55:33 +0000 hourly 1 https://wordpress.org/?v=7.0 By: Ron Brecher https://astrodoc.ca/sh2-155-2024/#comment-21909 Mon, 22 Jan 2024 13:55:33 +0000 https://astrodoc.ca/?p=13596#comment-21909 In reply to Keith.

This data was acquired with a CCD camera with much lower quantum efficiency. I always used longer exposure times for that camera than I do for current CMOS cameras.

]]> By: Keith https://astrodoc.ca/sh2-155-2024/#comment-21905 Mon, 22 Jan 2024 01:44:21 +0000 https://astrodoc.ca/?p=13596#comment-21905 Great picture Ron! Isn’t 15 minute RGB exposures longer than you usually take? In my skies in northern Michigan I can’t go past 5 minutes for GGB.

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