Go Back   IceInSpace > Images > Deep Space

Reply
 
Thread Tools Rate Thread
  #1  
Old 19-04-2019, 12:15 PM
DJT (David)
Registered User

DJT is offline
 
Join Date: Nov 2011
Location: Sydney
Posts: 1,452
Ngc5139- first light CFF RC250

What with weather, USB cable issues and ordering the the wrong focuser motor from starlight along with a trip overseas, getting a first light has been a long time coming.

Not the most challenging DSO but it’s great for picking up any collimation issues.


I havnt actually touched collimation yet, still trying to find a window of opportunity with decent seeing and it’s a little off, but straight out of the box, there don’t seem to be any dramas with the mirrors.


Details
NGC5139
RGB 30:30:30 in 5 minute subs from sunny Sydney


CFF RC250mmat F7 with custom field Flattener. Focal length is 1790.
STL6303e
AP900
Processed in PI, really basic stuff, calibration, some light touch NR , photometric colour calibration, followed by HST.


Large image here


CFF RC250 F7 First Light - NGC5139
Attached Thumbnails
Click for full-size image (NGC5139RGBfirst lightsmall.jpg)
216.3 KB127 views

Last edited by DJT; 19-04-2019 at 12:32 PM. Reason: image attached
Reply With Quote
  #2  
Old 19-04-2019, 01:33 PM
codemonkey's Avatar
codemonkey (Lee)
Lee "Wormsy" Borsboom

codemonkey is offline
 
Join Date: Jul 2013
Location: Kilcoy, QLD
Posts: 2,058
Very nice indeed, David. Great first light. Looks like the new scope is a cracker!
Reply With Quote
  #3  
Old 19-04-2019, 02:16 PM
Atmos's Avatar
Atmos (Colin)
Ultimate Noob

Atmos is offline
 
Join Date: Aug 2011
Location: Melbourne
Posts: 6,980
An excellent first light David. Looks like the collimation may be biased towards the bottom right but it’s still very good on-axis.
Reply With Quote
  #4  
Old 19-04-2019, 05:22 PM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Sydney
Posts: 22,060
That's superb David, essentially perfect.
Reply With Quote
  #5  
Old 19-04-2019, 07:58 PM
Geoff45's Avatar
Geoff45 (Geoff)
PI rules

Geoff45 is offline
 
Join Date: Jul 2006
Location: Sydney
Posts: 2,631
Great image. Nice tiny stars and accurate colour.
Reply With Quote
  #6  
Old 20-04-2019, 10:31 AM
strongmanmike's Avatar
strongmanmike (Michael)
Highest Observatory in Oz

strongmanmike is offline
 
Join Date: May 2006
Location: Canberra
Posts: 17,152
A nice Omega there and for a new scope straight out'a the box, that looks pretty good Dave, once tweaked it will be excellent ...hope you don't tweak and make it worse like I did recently ...but if you do, don't worry you can get it back

Mike
Reply With Quote
  #7  
Old 20-04-2019, 12:05 PM
Capella_Ben (Ben)
Registered User

Capella_Ben is offline
 
Join Date: Apr 2018
Location: Brisbane
Posts: 60
Very nice. Looking forward to seeing more.
Reply With Quote
  #8  
Old 22-04-2019, 01:55 PM
DJT (David)
Registered User

DJT is offline
 
Join Date: Nov 2011
Location: Sydney
Posts: 1,452
Quote:
Originally Posted by strongmanmike View Post
A nice Omega there and for a new scope straight out'a the box, that looks pretty good Dave, once tweaked it will be excellent ...hope you don't tweak and make it worse like I did recently ...but if you do, don't worry you can get it back

Mike
Quote:
Originally Posted by Atmos View Post
An excellent first light David. Looks like the collimation may be biased towards the bottom right but it’s still very good on-axis.
Thanks everyone for the comments. On Collimation, yeah..a tweak..it should be a lot less fraught than the previous scopes..


Cheers
Reply With Quote
  #9  
Old 23-04-2019, 12:37 PM
Andy01's Avatar
Andy01 (Andy)
My God it's full of stars

Andy01 is offline
 
Join Date: Mar 2012
Location: Melbourne
Posts: 3,253
Echoing other comments above - a very nice Omega C
Reply With Quote
  #10  
Old 24-04-2019, 10:18 AM
gregbradley's Avatar
gregbradley
Registered User

gregbradley is offline
 
Join Date: Feb 2006
Location: Sydney
Posts: 17,877
An impressive first light. Collimation looks pretty close as others have mentioned. Just a bit off on the top right.

Good to see excellent CFF products as I have a CFF scope on order myself.

Greg.
Reply With Quote
  #11  
Old 25-04-2019, 09:25 PM
DJT (David)
Registered User

DJT is offline
 
Join Date: Nov 2011
Location: Sydney
Posts: 1,452
Quote:
Originally Posted by gregbradley View Post
An impressive first light. Collimation looks pretty close as others have mentioned. Just a bit off on the top right.

Good to see excellent CFF products as I have a CFF scope on order myself.

Greg.
Quote:
Originally Posted by Andy01 View Post
Echoing other comments above - a very nice Omega C
Thanks Andy, much appreciated.

Greg, you can’t declare a CFF order without telling us which one!


I dialed in the Collimation this evening. Given past experiences I had been procrastinating but was done and dusted in just a few minutes.


Very happy 😃
Reply With Quote
  #12  
Old 26-04-2019, 08:15 AM
traveller's Avatar
traveller (Bo)
Not enough time and money

traveller is offline
 
Join Date: Aug 2011
Location: Melbourne
Posts: 2,133
Great first light David.
Just a question on light pollution, did you have a LP filter in the image path? I can't imagine 5 min subs in Sydney without some form of LP suppression.
Thanks
Bo
Reply With Quote
  #13  
Old 26-04-2019, 03:04 PM
DJT (David)
Registered User

DJT is offline
 
Join Date: Nov 2011
Location: Sydney
Posts: 1,452
Hi Bo

No LP filter was used. I do use astrodon LRGB filters in the imaging train Which are designed to exclude much LP from Sodium lights in the red and green so that’s definitely helping.The Products site at astrodon has more info on that .


I do have a street light outside the front of the house which is on a main road and there is a beautifully well floodlit sports field about 200 yards beyond that as well


I am also pretty close to the city.


For processing I just did some photometric colour calibration and SCNR green removal (sorry Marc) in pix insight.


Occasionally I might desaturate the background but for this image it wasn’t needed.


Am currently imaging M83 which is nice and bright and LP is not affecting the image enough to worry about. Basic processing is dealing with it.
Reply With Quote
  #14  
Old 26-04-2019, 07:08 PM
traveller's Avatar
traveller (Bo)
Not enough time and money

traveller is offline
 
Join Date: Aug 2011
Location: Melbourne
Posts: 2,133
Thank you for the detailed explanation.
Even more impressive!
Bo
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 09:33 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Testar
Advertisement