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

M31 Revisited

  • Please log in to reply
3 replies to this topic

#1 John Rogers

John Rogers

    Ranger 4

  • *****
  • topic starter
  • Posts: 388
  • Joined: 08 Feb 2008

Posted 24 August 2019 - 08:41 PM

The first image was taken around 1975 with a 6" f5.3 Newtonian reflector and 103-AF film.  It was a guided 30 minute exposure.

 

The second photo is one I took last night, using a Canon 300mm f4 FD lens/EOS 450D camera mounted on a Meade LX70 mount.  80 unguided images of 30 second duration were combined using DeepSkyStacker version 4.2.2 Beta 1.  Post processing was performed in Photoshop.

 

Thinking back on the effort it took to get the single 1975 image compared to last night, there is no comparison!

 

1975_Circa_M31.jpg

M31 circa 1975

 

20190824_M31.jpg

M31 28 August 2019


  • zjc26138, Joe F Gafford, aaube and 1 other like this

#2 TxStars

TxStars

    Surveyor 1

  • *****
  • Posts: 1870
  • Joined: 01 Oct 2005
  • Loc: Lost In Space

Posted 25 August 2019 - 01:17 AM

Yea the new only required you to set up the equipment and do a little button clicking while you had to work to get the old one.  lol



#3 Michal1

Michal1

    Viking 1

  • -----
  • Posts: 574
  • Joined: 25 Jul 2010
  • Loc: Czech Republic, Central Europe

Posted 25 August 2019 - 04:47 AM

Everyone should choose what suits their needs. Thanks for comparison.



#4 Alen K

Alen K

    Apollo

  • -----
  • Posts: 1087
  • Joined: 25 Nov 2009

Posted 31 August 2019 - 11:24 PM

But the stars are smaller on the film image and it has better resolution on M31 (due to the use of a larger-aperture telescope versus a telephoto or maybe just better focusing one the older one). And the digital image has walking noise. So not quite the same result. That said, I'm never going back to film. Been there, done that, bought the "Real astrophotographers manually guide" T-shirt.   


  • John Rogers likes this


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.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics