Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Some images with the 12.5" Lockwood/Teeter

  • Please log in to reply
8 replies to this topic

#1 Cotts

Cotts

    Just Wondering

  • *****
  • Moderators
  • topic starter
  • Posts: 7982
  • Joined: 10 Oct 2005
  • Loc: Toronto, Ontario

Posted 17 November 2015 - 12:38 AM

These are all about 500 frames stacked from 30 seconds or so of video.  I'm working with the Canon 60Da with my new Lockwood/Teeter scope.  The videos were all 640x480 crop mode.  I was not at all careful about camera orientation nor have I figured out the plate scale yet.  

 

The quality varies.  Some of the stellar images are not very round due to atmospheric dispersion and, perhaps, some issues with the StellatCat drive system...  I'll have to look into it further..

 

I'm using an alt-az drive here and there seems to be very little field rotation...

 

All done in good seeing at the Chiefland (FL) Star Party.

 

Albireo

AlbireoShort Scale.jpg

 

Eta Ori

Eta Ori 12.5.jpg

 

Gamma Del

Gamma Del 12.5.jpg

 

Gamma And

GammaAnd12.5.jpg

 

Pi Aql

Pi Aql 12.5.jpg

 

Zeta Aqr

Zeta Aqr 12.5.jpg

 

Zeta Ori

ZetaOri12.5.jpg

 

No science here!  Just for practice!

 

Dave

 

 

 

 


  • SabiaJD, CelestronDaddy, gitane71 and 1 other like this

#2 havasman

havasman

    Fly Me to the Moon

  • ****-
  • Posts: 6253
  • Joined: 04 Aug 2013
  • Loc: Dallas, Texas

Posted 17 November 2015 - 01:47 AM

Looks like you're having a heckuva lot of fun with it.   :waytogo: 



#3 Cotts

Cotts

    Just Wondering

  • *****
  • Moderators
  • topic starter
  • Posts: 7982
  • Joined: 10 Oct 2005
  • Loc: Toronto, Ontario

Posted 17 November 2015 - 09:20 AM

Somehow forgot this one:  Trapezium A-B-C-D-E-F

 

Trapezium12.5.jpg

 

Dave

 


  • BillP, eros312, CelestronDaddy and 1 other like this

#4 drollere

drollere

    Vanguard

  • *****
  • Posts: 2328
  • Joined: 02 Feb 2010
  • Loc: sebastopol, california

Posted 28 November 2015 - 01:58 PM

amazing stuff, cotts, really fine work. how did you "drop out" the nebula in the trapezium? is that just a consequence of stacking very short exposure frames, or a "blue" biased sensor?



#5 Rich (RLTYS)

Rich (RLTYS)

    Fly Me to the Moon

  • *****
  • Posts: 6527
  • Joined: 18 Dec 2004
  • Loc: New York (Long Island)

Posted 29 November 2015 - 08:44 AM

amazing stuff, cotts, really fine work. how did you "drop out" the nebula in the trapezium? is that just a consequence of stacking very short exposure frames, or a "blue" biased sensor?

I'd be curious to know also.

 

Rich (RLTYS)



#6 Cotts

Cotts

    Just Wondering

  • *****
  • Moderators
  • topic starter
  • Posts: 7982
  • Joined: 10 Oct 2005
  • Loc: Toronto, Ontario

Posted 29 November 2015 - 10:42 AM

amazing stuff, cotts, really fine work. how did you "drop out" the nebula in the trapezium? is that just a consequence of stacking very short exposure frames, or a "blue" biased sensor?

Thx, Bruce.  I do nothing special to lose the nebulosity.  Shooting frames of 1/60 sec. at 6400 ISO seems to simply not be enough exposure....

 

In this Trapezium picture it was only about 30 degrees above the horizon.  The scope/camera seems to be resolving the atmospheric dispersion very well....  The Gamma Delphini image in a previous post was shot  at about 75 degrees elevation and the stars are much rounder...

 

For my measurement work (which is where these photos are leading) I'll have to be careful to shoot 'high' to get the roundest stellar images possible....

 

Dave



#7 chrysalis

chrysalis

    Surveyor 1

  • *****
  • Posts: 1906
  • Joined: 10 Aug 2013
  • Loc: North Central NC

Posted 29 November 2015 - 11:42 AM

Great pix!



#8 Bonco

Bonco

    Skylab

  • *****
  • Posts: 4008
  • Joined: 17 Apr 2006
  • Loc: Florida

Posted 29 November 2015 - 04:50 PM

Thanks. I particularly liked the Trapezium with E and F included. It's very much like I see visually with a small refractor. You really have to know where to look with a 4 inch scope and your picture captured the difficulty.

Bill


  • CelestronDaddy likes this

#9 CelestronDaddy

CelestronDaddy

    Apollo

  • *****
  • Posts: 1061
  • Joined: 21 Aug 2009
  • Loc: Central Texas

Posted 29 November 2015 - 04:55 PM

Dave - Very nice indeed! Thanks for posting .... :waytogo:




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.







Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics