Astrofriend
14-01-2020, 12:17 PM
A friend ask me about filter size, I already had a Excel sheet with that calculation. But I did a new web calculator.
It's the first version but it looks to calculate it correct, have a look:
http://www.astrofriend.eu/astronomy/astronomy-calculations/minimize-vignetting/minimize-vignetting.html
It's not any high precision calculation, but gives knowledge enough I think.
Too small filter gives vignetting, too big filter empty the wallet.
/Lars
It's the first version but it looks to calculate it correct, have a look:
http://www.astrofriend.eu/astronomy/astronomy-calculations/minimize-vignetting/minimize-vignetting.html
It's not any high precision calculation, but gives knowledge enough I think.
Too small filter gives vignetting, too big filter empty the wallet.
/Lars