ICEINSPACE
Most Read Articles
Moon Phase
CURRENT MOON Waning Gibbous
72.9%
The Sun Now
Time Zones
Sydney*
5:15 pm
Perth
2:15 pm
Auckland*
7:15 pm
New York
1:15 am
Paris
7:15 am
GMT
6:15 am




  #1  
Old 27-03-2017, 01:36 PM
garymck (Gary)
Registered User

garymck is offline
 
Join Date: Aug 2005
Location: Geelong
Posts: 657
narrow band possibility?

hi,
due to limited time for imaging - due to clouds, would it be feasible (ie produce decent results) to do the following:

Image at bin 1 x 1 for Ha (to get detail) say for 10 mins per sub.

Then do 10 minute subs at bin 2 x 2 for S and O? rather than having to do them at 20 min subs to get a decent number of photons..... ?

cheers
Gary
Reply With Quote
  #2  
Old 27-03-2017, 01:53 PM
Somnium's Avatar
Somnium (Aidan)
Aidan

Somnium is offline
 
Join Date: Oct 2014
Location: Sydney
Posts: 1,662
so firstly, bin 2x2 will give you 4x the amount of photons per pixel, so if you are looking to get the equivalent of 20mins 1x1, you will only need to do 5 min subs. but regardless, sure, there is no reason why you cant do that. I assume you are using your Ha as the Lum layer? that way you will get the extra detail but if not (i.e. no lum layer) you will be limited by your poorest resolution.
Reply With Quote
  #3  
Old 28-03-2017, 06:49 AM
garymck (Gary)
Registered User

garymck is offline
 
Join Date: Aug 2005
Location: Geelong
Posts: 657
Hi,
thanks.. Thought I'd keep the same exposure length to go deeper in S and O. I have a KAF8300 ccd (WHY9S) and unfortunately in this case binning 2x2 isn't 4x sensitivity - it's about 2.6 times.

Will give it a try and see what happens...

cheers
Gary


Quote:
Originally Posted by Somnium View Post
so firstly, bin 2x2 will give you 4x the amount of photons per pixel, so if you are looking to get the equivalent of 20mins 1x1, you will only need to do 5 min subs. but regardless, sure, there is no reason why you cant do that. I assume you are using your Ha as the Lum layer? that way you will get the extra detail but if not (i.e. no lum layer) you will be limited by your poorest resolution.
Reply With Quote
Reply

Bookmarks

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 04:15 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
OzScopes Authorised Dealer
Advertisement
Lunatico Astronomical
Advertisement
Interest Free Finance
Advertisement
Bintel
Advertisement
NexDome Observatories
Advertisement
FLI Cameras and Imaging Accessories
Advertisement
SkyWatcher 2018 Catalogue
Advertisement
SkyWatcher WiFi Adaptor
Advertisement
Astronomy and Electronics Centre
Advertisement