Iris M57

Borg releases 1st iris unit, which allows to adjust ID 5mm to 47mm. Amazingly it has 20 blades – virtually round iris shape. Since both ends have M57, it can be used with any of Borg scopes. But larger objective apertures requires setting it further from the objective. As the result, the control of the depth of the field is less effective. So it is the best match with Mini Borg series. It can be set in front of camera lenses too.

~ by tedishikawa on October 12, 2009.