Optec - NextGEN Deep Sky filter, mounted in 50mm bushing (46mm clear aperture)
Deep Sky - Blocks UV, violet and sodium light completely. The filter passes the important emission nebulae features with +90% transmission.
All of the NextGEN series reducers accept the standard 48mm filter thread commonly refered to as 2-inch filter size. The filters from Optec are of the highest photographic quality and are available with many different transmission characteristics to enhance contrast, reduce background illumination or block certain wavelengths. Since the Optec filters have threads on only one side, they cannot be stacked.
Optec can supply a full range of filters for the IFW wheel. Filters are easily and safely mounted in the new IFW filter wheel by use of delrin plastic holding tabs and spacers. Filters from 1 to 5 mm in thickness can be accommodated with use of delrin ring spacers. Because the flexible tab and not the head of the screw holds the filter in place, it is impossible for the filter to be damaged by excess over tightening. An ample supple of tabs and spacers are supplied with each filter wheel.
Filter wheels for both 50mm diameter and 2-inch diameter are available. For special purposes, an 8 position wheel configured for 1-inch filters is offered.
|Name||Optec - Optec Deep Sky filter, mounted in 50mm bushing (46mm clear aperture), 4.0 +/- 0.1mm thick.|