Tiffen 4 x 4" 85C Color Conversion Filter Middle Atlantic SB1 simply loosen a silver tightening

simply loosen a silver tightening knob on the crank and slide the handle in or out to adjust the arc diameter

Widescreen supported Humidity 10 to 85% Temperature Operating: 32 to 158°F / 0 to 70°C

Barlow Lens 2" diameter barrel and eyepiece holder

Gold - Same as silver

Tiffen 4 x 4" 85C Color Conversion Filter Middle Atlantic SB1 simply loosen a silver tighteningWarming Color Conversion Filter 5500 to 3800K Color Temp Decrease ColorCore Technology The Tiffen 4 x 4" 85C Color Conversion Filter helps to decrease the color temperature from 5500 to 3800K, allowing the use of tungsten balanced film in daylight conditions. The warming effect of this filter requires a 0. 3 stop increase in exposure for normal results. This filter is made using ColorCore technology, a process that involves laminating the filter