Old 03-02-2014, 08:44 PM
Legin (Nigel)
Registered User

Legin is offline
Join Date: Jul 2008
Location: Sydney
Posts: 76
RGB exposures

Ok so I have pretty much mastered my black and white shots with my DMK41. Well ok I have improved to a point that I am comfortable with. Now I am trying my hands at RGB with a filter wheel. I actually have a five slot wheel with clear Luminance IR/UV, red, green, blue filters in place and one empty slot.

I am having troubles getting the exposures for the RGB images correct. I usually take one unfiltered shot then take a third of the exposure. so if I use say 1/250th sec unfiltered I then start at say 1/60th of a second and play about with the gain.

Even so I still get very dark RGB images.

Anyone got any ball park figures to use. I know trial and error is sometimes the best teacher but sometimes it helps to have a heads up (so to speak).

If you do RGB or more precisely LRBG then please let me know your exposure times. I know it will depend on the night and my gear etc. But a general idea would be nice.

Just for the record I use a 12" Newtonian and a DMK 41 with an Orion filter wheel and a set of Astronomik filters. I think the Astronomik LRGB filter set is a good choice.

Otherwise I am really starting to like black and white. It really grows on you
Reply With Quote


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +10. The time is now 08:32 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
NexDome Observatories
Limpet Controller
Astronomy and Electronics Centre