IDX System Technology 4 x 5.65" ALPHA-I Solid Neutral Density 0.3 Filter (1-Stop) Tiffen 5650CGTB3S the Alpine Astronomical Baader Dark

the Alpine Astronomical Baader Dark Blue Colored Bandpass Eyepiece Filter can be used by itself or stacked with other filters to enhance your observations when viewing or imaging planets such as Venus

12mR at 20kHZ Maximum impedance

250V product from APEM with the model number 5637ABProduct details

Locking right-eye dioptric correction allows user to compensate for optical prescription to produce sharper views

IDX System Technology 4 x 5.65" ALPHA-I Solid Neutral Density 0.3 Filter (1-Stop) Tiffen 5650CGTB3S the Alpine Astronomical Baader Dark2x Filter Factor, 1 Stop Darkens Entire Image Allows Reduced Shutter Speed Allows Wider Aperture Optical Glass Construction Multi Coated 4mm Thick Padded Pouch The 4 x 5. 65" ALPHA I Solid Neutral Density 0. 3 Filter from IDX System Technology is an ND filter with a 2x filter factor that provides a 1 stop exposure reduction. Its 0. 3 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter