OPTOLONG 3nm NARROWBAND SHO FILTER SET Size:2" This 15mm M68 extension tube

This 15mm M68 extension tube features a male M68 x 1 thread on one end and a female M68 x 1 thread on the other

AZ-EQ6 Pro/GT and EQ6-R Pro mounts

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

The QHYCFW3 main body is CNC machined from a single piece of aluminium

OPTOLONG 3nm NARROWBAND SHO FILTER SET Size:2" This 15mm M68 extension tubeThe 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