The enhanced basic model with separately engageable red-free, blue and polarization filters for each aperture.

Features

* Diopter wheel with 29 corrective lenses

* Plus 1-10, 12, 15, 20, 40

* Minus 1-10, 15, 20, 25, 30, 35

* Easy-to-operate aperture hand-wheel with semi-circle, small/medium/large circle, fixation star, and slit

* Includes filter wheel engageable for all apertures with symbol display, red-free filter, blue filter and polarization filter

* Optimized high-performance optics with aspherical condenser lens

* Parallel beam path

* Dust-proof