Quote:
Originally Posted by brian nordstrom
 [...] its a common wrong idea that telescope's/ eyepieces magnify a distant object , they don't , they actually bring an object to the angular size it would look when much closer .
For example looking at say Jupiter at 200x is not seeing the planet 200x bigger  but it is what Jupiter would look like if it was 200x closer than it physically is so instead of an average distance of 440 million km's at 200x it would look like it was only 2.2 million km away if using the naked eye , that's 1x . |
I'm not sure that's right. If it made Jupiter look as it would if it was 200 x closer, wouldn't it therefore have a larger angular size relative to background objects? This would affect the timings of moon transits and star occultations, surely? If you take a photo and blow it up x 2, or halve your eyepiece focal length you get the same result, right? Or am I misunderstanding what you meant?