Re: Telescope magnification question

Neil W wrote:
This is really more an optics question, but I'm hoping someone here can answer this question from an astronomy course and explain the reasoning. Thanks!

A telescope has an aperture of 8", objective focal length of 80" and a 1/2" focal length eyepiece. What is the magnification?



The maximum practical power is 50x8" so 400x

With your scope you're looking at 160x (80/0.5).

--
Abo
.

Relevant Pages

  • Re: Smaller hole in telescopes cover
    ... As I don't have a telescope, ... The filter doesn't have any edge diffraction effects. ... diffraction limited to the size of the hole, but if multiple holes are used ... I believe that the radio telescopes and Keck use aperture synthesis ...
    (sci.astro.amateur)
  • Re: Looking at 130mm reflector . . .
    ... > the telescope specs so I have been doing some reading. ... the aperture, the brighter everything appears, and the more "resolved". ... Dob, especially at first. ... roll the scope out of the garage on a handtruck. ...
    (sci.astro.amateur)
  • Re: Selecting a telescope
    ... I would like to see some images of planets, constellations etc taken from a selection of telescopes in order to see what one gets for the money. ... Does anyone know of any web sites containing images along with information about the telescope used. ... Also, how worthwhile are the computerised GoTo systems, they sound good but add a lot to the cost. ... Some people would prefer to put the extra money into aperture, ...
    (sci.astro.amateur)
  • Re: What If ET Does Not Use Radio Waves
    ... we'd need to build a telescope with a aperture of something like 100 kilometres. ... You can't just take designs that work for 100 metres separation and expand them to work for thousands of kilometres. ...
    (sci.astro.seti)
  • Re: Newtonian mirror > 10" where available?
    ... So it seems a Celestron 9.25" at $1350 OTA ... Well, there are different kinds of telescope, and they depend on what ... Of course, with a smaller aperture, a more expensive type of telescope ...
    (sci.astro.amateur)