OPTOLONG 3nm NARROWBAND SHO FILTER SET Size:2" which comprises the periodic irregularities

which comprises the periodic irregularities due to imperfection in the manufacturing and assembling of the worm

just screw the adapter on the telescope and connect your Canon camera

2 x RA motor and idler mouinting plates

13 kg Dimensions - Upper assembly 345 x 200 mm

OPTOLONG 3nm NARROWBAND SHO FILTER SET Size:2" which comprises the periodic irregularitiesThe NEW Optolong 3nm H Alpha, Oxygen III and Sulphur II narrow band filters boost the contrast of emission nebulae and supernova remnants for professional results, even under a bright sky affected by light pollution. This filter is used in combination with the OIII and SII filter to compose a narrowband colour image. The 3nm band pass is only 1% of the entire visible spectrum, increasing the signal to noise ratio and delivering high contrast images