[prostie1200]

The image I have attached was taken with a D70 – PB-5 Bellows at 80mm with an M2ext ,105mm 2.8D lens, f32 at 1/60, the working distance, lens to subject was 4” and lit by a lateral undiffused 60watt tungsten light. WB set to tungsten ISO100.

The subject is a balance wheel in a small wrist watch, which measures 8mmDia – how do I determine the magnification?

I tried to find it by measurement – converted the Raw file to jpeg in PS and the rulers showed the Image size as 24.7 x 16.5, which is roughly the size of the CCD – would the Mag be the ratio of the Dia of the wheel to the overall width of the image?.

Thanks for any help.