Horsehead Nebula via SharpStar 76 APO, L-eXtreme Filter in Bortle 8
Horsehead Nebula (IC 434) via a SharpStar 76mm EDPH APO refractor, L-eXtreme Filter in a Bortle 8 Zone
This image, a second test of the L-Extreme filter, was captured on a small, portable, SharpStar 76mm EDPH APO telescope with an Optolong L-eXtreme dual band HA/OIII filter. The mount was an iOptron CEM25P guided by an ASI120mm Mini camera on a ZWO 30mm/fl 120mm guide scope. The camera was an ASI294MC Pro. Exposures were 13x300s at unity gain of 120 with the camera cooled to -10 C. Parking lot lights were very near me. I wanted to see just how much of the light the L-eXtreme filter would ignore. I'm very impressed with this filter. No darks or other calibration frames were taken. All work for imaging, polar alignment, plate solving, guiding, etc. was done on an ASIAIR Plus box. Processing was done in Pixinsight with final touchup in Corel Paintshop Pro. Earlier I had taken over twice as many images with the William Optics Z61 APO at another very bright location. I wanted to take a second image with the new SharpStar 76 APO at a little bit darker location.
Horsehead Nebula via SharpStar 76 APO, L-eXtreme Filter in Bortle 8
Horsehead Nebula (IC 434) via a SharpStar 76mm EDPH APO refractor, L-eXtreme Filter in a Bortle 8 Zone
This image, a second test of the L-Extreme filter, was captured on a small, portable, SharpStar 76mm EDPH APO telescope with an Optolong L-eXtreme dual band HA/OIII filter. The mount was an iOptron CEM25P guided by an ASI120mm Mini camera on a ZWO 30mm/fl 120mm guide scope. The camera was an ASI294MC Pro. Exposures were 13x300s at unity gain of 120 with the camera cooled to -10 C. Parking lot lights were very near me. I wanted to see just how much of the light the L-eXtreme filter would ignore. I'm very impressed with this filter. No darks or other calibration frames were taken. All work for imaging, polar alignment, plate solving, guiding, etc. was done on an ASIAIR Plus box. Processing was done in Pixinsight with final touchup in Corel Paintshop Pro. Earlier I had taken over twice as many images with the William Optics Z61 APO at another very bright location. I wanted to take a second image with the new SharpStar 76 APO at a little bit darker location.