BAADER SLOAN/SDSS G' PHOTOMETRIC FILTER Size:2" the 24mm version has a

the 24mm version has a fixed focal length

The TS Optics 2

Combining the reflecting and double refracting action (the incoming light passes through the full thickness of the primary mirror twice) of this element

Two bolts for the connection to the adapter to the EQ6-R / AzEq6 tripod

BAADER SLOAN/SDSS G' PHOTOMETRIC FILTER Size:2" the 24mm version has aThe Baader SLOAN g' filter is a precision grade photometric bandpass filter with a central wavelength window around 468. 6nm. In 2000, a new era in photometry began: with the Sloan Digital Sky Survey (SDSS), a 2. 5m telescope at Apache Point Observatory (New Mexico, USA) surveyed one third of the sky in five wavelengths, with windows around 355. 1, 468. 6, 616. 6, 748. 0 and 893. 2 nm. This system was also used for the Pan STARRS project; the broad