Refracting Telescope - how it works

[TonyD]

Check out this web page:

A good way of understanding how the basic refractor telescope lens setup works.

All the best,

[Astro_king]

Thanks

[Capricorn]

Be better if whoever produced it knew either of the 2 sign conventions for optics.

That way the -ve sign would drop out of the value for magnification.

[TonyD]

That way the -ve sign would drop out of the value for magnification.

I always thought that the minus sign has to do with whether the image is inverted or right-side-up, which is an accepted convention.