Version 2 supports 17 different opsins and a complete light scattering brain atlas for the adult mouse that allows a user to look up the brain area of his/her choice, and read the specific scattering coefficient for this particular area.
For the scientific basis of this calculator, please see Al-Juboori, Dondzillo, Stubblefield, Felsen, Lei, and Klug: Light scattering properties vary across different regions of the adult mouse brain. PlosONE, in press.
For a user manual and additional information, please see www.optogeneticsapp.com.
A Pro and a Lite version are available. The two versions are identical with the exception that the Pro version includes a complete brain atlas consisting of 43 images / plates, while the atlas Lite version only has 5 plates.