Useful On-Line Calculator for Scope Magnification and Exit Pupil Size

[Polar Bear]

I find this very handy for doing calculations regarding magnification, exit pupil diameter, giving you an idea of what your limiting magnitude is for a certain scope and what detail it will resolve.

Paul

N.A.A. Telescope Math Calculator

[microbe]

As I'm looking at eyepieces for my planned Skywatcher 200P, it's a useful site. Not just to find the exit pupil of an eyepiece, but also the expected pupil diameter for a given age.

[Polar Bear]

As I'm looking at eyepieces for my planned Skywatcher 200P, it's a useful site. Not just to find the exit pupil of an eyepiece, but also the expected pupil diameter for a given age.

Its also interesting to see the 'optimum' magnification for certain scopes.

Saves getting the calculator out and wasting paper

Paul

[arrayschism]

A really useful site - I am looking up some eyepieces for a 12" dob and it's helped me decide what's realistic in terms of choice.

One note: the script used by the page does not like the Google Chrome browser - works best with Firefox.

[Mr Spock]

Excellent link. I've just been using it and it's very useful indeed.

[JG777]

Just bookmarked this as well, good link, thanks.