I need to calculate the magnification, m of an objective lens, so I can then x it by the eyepiece value for M to get the total magnification.
I need v/u (v is dist from lens to image; u is dist of object to lens)
I'm using 1/f = 1/v+1/u rearranged for 1/v.
That's: 1/v = 1/f - 1/u. I think?
The object is 26mm away from the lens; the focal length is 25mm.
I keep getting v = 500mm! (650mm too).
Any ideas where i'm going wrong please?
Thanks.