EP Simulator - Great Stuff

[Waxing_Gibbous]

I found this over on CN and think its the beez neez. It allows you to visualise the difference between EPs of varying FoV and focal lengths.
Comparing my views at the eyepiece with those of the simulator's, I found them to be pretty spot-on. :thumbsup:
Give it a whirl: http://www.stelvision.com/en/

[AG Hybrid]

Its not bad actually. It even adjusts the image brightness for the aperture of the telescope entered. All the way up to 24".
My only criticism is that if it is going to attempt to adjust image brightness for aperture it also needs to calculate it for exit pupil. M42 for instance is the same dim image in my 6" Mak with a 10 mm eyepiece as it supposedly in my 12" Dob with a 30 mm eyepieces. LOL no it isn't!

[el_draco]

Thats fun...

[Stormfyre32]

Very good tool.