Useful weblink

1,http://extreme-macro.co.uk/

By Johan J Ingles-Le Nobel .It’s very useful website for  macro photography professionals or amateurs.And thanks to Johan,he reviewed our rail as well.

http://extreme-macro.co.uk/wemacro-rail/

(The software will be upgraded soon in these weeks.Auto mode will be add in control soon).

2,http://www.microscopyu.com/articles/formulas/formulasfielddepth.html

DOF about some Nikon objective lens.You can set step length smaller than DOF of objective lens.

3,http://support-sg.canon-asia.com/contents/SG/EN/0300351701.html

MP-E 65mm manual download page.DOF of lens is on page 6.