DOBSON PHOTOGRAPH - 30s MAX? Increase the exposure time (without an equatorial platform, without ...
#dobson #astrophotography
It's common knowledge, or nearly so, that in Dobsonian astrophotography, we're limited by field rotation. This limit is set at 30 seconds.
In this tutorial, I'll give you a comprehensive overview of all the parameters that limit exposure time, field rotation being just one part of this set.
And for the more astute among you, indeed, a number divided by 0 does not equal 0 ;)
Link to the maximum exposure time calculation file:
// IMPORTANT: After following the link, click "File/Download" to save the file to your computer and save your changes //
https://docs.google.com/spreadsheets/...
Theoretical explanations on field rotation:
http://astro.dialou.fr/techniques/ast...