Optolong L-eXtreme Dual-Band Narrow Band Filter 2" Mounted (OPT-L-EXTREME-2) Rechargeable Battery Pack This was the year that

This was the year that Celestron joined forces with the Santa Barbara Instruments Group (SBIG) to produce Fastar

(See compatibility list below

5nm bandwidth of light centered on a wavelength of 500nm through

) Units are stackable: for example 2 units add 16mm height and make a 40mm Plössl very comfortable for solar viewing by blocking out stray daylight to maximize contrast in white light or hydrogen-alpha viewing

5 pounds Dob Base Measurements 14"x17" Zenith Eyepiece Height 28" Accessories Included Finder Red Dot Included Diagonal No Included Eyepieces 25mm and 10mm SUPER eyepiece (1

Optolong L-eXtreme Dual-Band Narrow Band Filter 2" Mounted (OPT-L-EXTREME-2) Rechargeable Battery Pack This was the year thatUnlike the Optolong L eNhance filter which is a tri band (transmits Hb, Ha, and OIII), the L eXtreme filter is dual band that passes Ha and OIII emission lines. Main Usage L eXtreme is a two 7nm bandpass filter which can be used with one shot colour cameras like DSLR's (digital SLR), and monochrome CCD cameras, it is also more suited for fast systems. The convenience and cost effectiveness of this filter allows amateurs to image a rich emission