Angular Magnification

Some articles on magnification, angular magnification:

Magnification As A Number (optical Magnification) - Sheldon's Calculations
... Single lens The linear magnification of a thin lens is where is the focal length and is the distance from the lens to the object ... lens to the image, the height of the image and the height of the object, the magnification can also be written as Note again that a negative magnification implies an inverted image ... When the focal length is positive the image's height, distance and magnification are real and positive ...
Magnification As A Number (optical Magnification) - Measurement of Telescope Magnification
... Measuring the actual angular magnification of a telescope is difficult, but it is possible to use the reciprocal relationship between the linear magnification and the angular magnification ... objects at the distance for which the angular magnification is to be determined and then the object glass is used as an object the image of which is known as the exit pupil ... will be much smaller than the object glass diameter, which gives the linear magnification (actually a reduction), the angular magnification can be determined ...