I found this poor image / magnifications / eyepieces

[Ukastronomer]

Does anyone know where I can find a better copy thanks

[N1]

Just do a quick spreadsheet. Power=Scope FL/ Eyepiece FL

[OICURMT]

As suggested, created one in Excel.

[pmrid]

You can knock one up very easily using an Excel spreadsheet. Each cell is the same formula I.E. Scope FL/Eyepiece FL.
The formula is just =FL/EPFL

Peter

[LewisM]

Or just do some simple mental arithmetic. Or use your phone calculator :lol:

[xelasnave]

But we need a sheet showing adding a barlow..2x 3x and 5x.☺
Alex

[Ukastronomer]

Good thinking people, spreadsheet