It’s called the sky. Just aim the telescope up at dawn and take pictures. The
dawn sky is the best diffuse light source there is.
Bernard
Sent from my iPad
On Mar 19, 2019, at 5:16 PM, Michael McDonald <mikemac@xxxxxxxxxxx> wrote:
Don’t you need a diffuser for the flats? Or maybe I have the wrong name. Same
exposure and focus as your lights but with a diffused, out of focus light
source. Supposed to get rid of vignetting and help with dust spots.
Mike McDonald
mikemac@xxxxxxxxxxx
On Mar 19, 2019, at 4:06 PM, Bernard Miller <bgmiller011@xxxxxxx> wrote:
I use a program called ACP hat does pretty much everything. In the dawn it
runs a sky flat routine to collect sky flats before shutting down.
Bernard
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx <az-observing-bounce@xxxxxxxxxxxxx>
On Behalf Of Michael McDonald
Sent: Tuesday, March 19, 2019 3:22 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: NGC 1566 - The Spanish Dancer Galaxy
How do you take “flats” at your remote observatory? Seems like it would be
“inconvenient" to have to run to NM every morning to stretch a T shirt
across the scope. So you must have some automated way of doing them. It’s
another one of those things I’ve never heard mentioned.
Mike McDonald
mikemac@xxxxxxxxxxx
On Mar 18, 2019, at 10:27 PM, Bernard Miller <bgmiller011@xxxxxxx> wrote:
Hi,
I normally spend about 18 hours on a single LRGB image (9 hours L, and 3
hours each RGB) and 30 hours on narrowband images ( 9 hours each HA, SII,
OIII and 1 hour each of RGB for the stars). It can take a week or several
months depending on the weather. My longest time for one image was 14
months. I ran out of time and had to wait for it to cone around again.
Bernard
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