Feild of veiw in starrynight pro

[libraryman]

Useing my 350d with a f/4.5 800mm fl reflector, it seems that the feild of veiw is 56.5 x 84.8 arc min.

how do i turn this into a feild of veiw in degrees that i could show as a rectangular indicator in Starrynight pro.

i know that one deg is equal to 60arc min's but the 56.5 x 84.8 is confusing to me.

Ray

[binabik]

Useing my 350d with a f/4.5 800mm fl reflector, it seems that the feild of veiw is 56.5 x 84.8 arc min.

how do i turn this into a feild of veiw in degrees that i could show as a rectangular indicator in Starrynight pro.

i know that one deg is equal to 60arc min's but the 56.5 x 84.8 is confusing to me.

Ray

simple math:

56.5/60 = 0.94167º

84.8/60 = 1.41333º

so you're looking at a 0.9x1.4 degree rectangle. unless i'm missing the point.

hope that helps, regards,

sb

[libraryman]

Yes that has helped,

thanks Ray