In the first post of this series I argued that you can save lots of money buying manual focus lenses and get great pictures with your DSLR camera. In this post we'll look at three more lenses: the Mogens' 500mm f/8 FD mount lens and his Helios 58mm f/2 M42 mount lens.

First one out is the 500mm. Since it's a M42 lens, the adapter steals 1/3 stop of light and gives a 1.26x crop, making this equivalent to a 630mm on a APS-C sensor or a 1008mm on 35mm film/full frame sensor.
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