ZWO 31mm SII 7nm Narrowband Filter - UNMOUNTED - Mark II SVBONY SV101 We have successfully tested and

We have successfully tested and controlled the following stepper motors:

Transmitter:

Expandable for Growing Businesses

designed for full-frame astrophotography and refined visual observing

helping to produce exceptionally clean long-exposure images

ZWO 31mm SII 7nm Narrowband Filter - UNMOUNTED - Mark II SVBONY SV101 We have successfully tested andZWO 31mm SII 7nm Narrowband Filter UNMOUNTED Mark II (Since mid 2018 ZWO supplies a new, improved version of their narrowband filters. The difference is visible when shooting night sky "landscapes" with very bright stars in the field of view, especially with the H alpha and SII filters, the difference is very very subtle when using the new OIII filters) The ZWO SII 7nm narrowband filter passes light at 672nm wavelength with a bandpass of 7nm which is