barlow before or after diagonal, magnification
Posted 21 August 2003 - 05:04 PM
Does any one know if their is a standard "rule of thumb" for the effect on magnification if you put a barlow in front of your diagonal as opposed to putting it between the eyepiece and diagonal mirror?
I would imagine optical design of all the light path elements would govern it (and whether it can be done at all), and that the rating (2x, 1.6x etc) of the barlow is with it directly infront of the eyepiece?
Posted 21 August 2003 - 05:43 PM
Posted 22 August 2003 - 11:22 PM
Posted 05 September 2003 - 12:44 AM