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This William Optics ZenithStar 61 f/5
Perfect for Concerts
Lunt 100mm Ha Etalon Filter w/B3400 for 2" Focuser Specifications
this little powerhouse is the ultimate portable camera sky tracking device
Interpupillary Distance: 56-74 mm
Antlia Edge 4.5nm SII Narrowband Filter - 31 mm Unmounted Mounts and Tripods This William Optics ZenithStar 61Antlia OIII Edge Filter Highlights: Type: Sulfur (SII) FWHM: 4. 5 nm CWL: 672. 4nm Filter Thickness: 2 mm + 0. 05 mm Peak Transmission: 90% Size: 31 mm Unmounted Antlia SII EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4. 5nm bandpass. The suppression of optical density (OD)5 on unwanted wavelengths and the excellent transmittance characteristics found in the Antlia 3nm Pro series has been incorporated into the 4. 5nm EDGE
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