Doctar Large Format Len Set
SL66 system is not using lens shutter for its lenses, therefore many other lenses can be adapted to be used on the SL66 system. I have this set of Doctar large format lenses 180/4.5 and 250/4.5 with 2 extension tubes. With different tube combination the 180/4.5 and 250/4.5 can be used on my SL66/SL66E. Since the lenses come with lens shutter I can also use them if I want to. At f4.5 it is easier to focus.