2012-Mar Completed
S90m head + M42 Helicoid + Nikon's M42->F adaptor

Today you can modify for pseudo M42 mount since it is
easy to adapt for any mount by using appropriate M42
helicoid (mostly you are using mirrorless digital camera).

(shot by D800E + Macro-Apo-Lanthar 125mmF/2.5 @f8)