Share:

APP 1.075 has been released !

2019 November: Complete LRGB Tutorial of NGC292, The Small Magellanic Cloud by Christian Sasse, Astronomer in Charge of iTelescope.net

2019 September: Astro Pixel Processor and iTelescope.net celebrate a new Partnership!

dynamic distortion correction  

  RSS

(@minusman)
Neutron Star Customer
Joined: 2 years ago
Posts: 118
August 3, 2017 14:44  

Hello Mabula, how does this work with the dynamic distortion correction. How to find out which setting is the right one, for example telephoto lens.


ReplyQuote
(@mabula-admin)
Quasar Admin
Joined: 3 years ago
Posts: 2168
August 4, 2017 18:22  

Hi Minusman,

For images shot with a telehoto lens I would suggest to

  • enable dynamic distortion correction
  • enable same camera and optics
  • increase distortion margin only when registration fails.
  • only increase scale stop if you are making a mosaic.

Let me know if this helps 😉

What objective are you using exactly?

Kind regards,

Mabula

Main developer of Astro Pixel Processor and owner of Aries Productions


ReplyQuote
(@minusman)
Neutron Star Customer
Joined: 2 years ago
Posts: 118
August 6, 2017 08:56  

Hello Mabula, I use a Sigma 50-500 mm F4.5-6.3 DG OS HSM and a mirror lens Mak 1000 recently.


ReplyQuote
(@mabula-admin)
Quasar Admin
Joined: 3 years ago
Posts: 2168
August 9, 2017 12:24  

Hi minusman,

Thank you, I know that zoom lenses usually have quite significant optical distortion and that the amount of optical distortion usually increases with shorter focal lengths.

Can you correctly apply the distortion correction on your data or do you need more help?

Kind regards,

Mabula

Main developer of Astro Pixel Processor and owner of Aries Productions


ReplyQuote
(@minusman)
Neutron Star Customer
Joined: 2 years ago
Posts: 118
February 12, 2018 11:08  

Hello Mabula, I have a question about dynamic distortion correction. And to the distortion margin, what causes the controller?


ReplyQuote
(@mabula-admin)
Quasar Admin
Joined: 3 years ago
Posts: 2168
February 20, 2018 22:00  
Posted by: minusman

Hello Mabula, I have a question about dynamic distortion correction. And to the distortion margin, what causes the controller?

@minusman,

The distortion margin is basically a clue that you can give to the registration engine. If you have little optical distortion then you can easily set it at the lowest value. Normally, you will only have to increase this setting if

  • you are using very short focal length objectives (less then 50mm focal length)
  • or if you are using an inexpensive very fast newton (Boren Simon for instance). These have quite strong distortion.
  • or if your scope is not well collimated, like with newtons, SCTs, RCs... 

 

So, in most cases, you don't need to alter the setting. Setting it lower will increase registration speed and vice versa.

Cheers,

Mabula

Main developer of Astro Pixel Processor and owner of Aries Productions


ReplyQuote
Share: