Item number: # 29156
Model: 1.25-inch Herschel Sun Filter
Interface: 1.25 inches (the eyepiece mount also provides M42x0.75 threads)
Optical path length: approximately 86mm
Built in: ND3.0 density filter (1/1000 transmittance, FMC, non removable) CPL polarization filter (can be adjusted by rotating the eyepiece holder, FMC, can be removed as needed) filter thread M28.5×0.6
Volume: Approximately 85x40x79mm (length x width x height)
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