simon fedida
M20 trifid_sag6_090627-12_126x0p94s_dk_hg2_hpm2
M20 Trifid nebula and M21 (open cluster at top centre)
June 2009, Alpujarras Mountains, Spain. 1004x long exposure modified video camera on a fixed tripod and ball head.
F2.8, 130mm pentax M42 screw thread lens stopped to F4. 126 x 1 second exposures, gamma setting 1, gain 75%, stacked and gamma stretched in Registax5 with additional high pass masking in Photoshop Elements.
M20 trifid_sag6_090627-12_126x0p94s_dk_hg2_hpm2
M20 Trifid nebula and M21 (open cluster at top centre)
June 2009, Alpujarras Mountains, Spain. 1004x long exposure modified video camera on a fixed tripod and ball head.
F2.8, 130mm pentax M42 screw thread lens stopped to F4. 126 x 1 second exposures, gamma setting 1, gain 75%, stacked and gamma stretched in Registax5 with additional high pass masking in Photoshop Elements.