a collaborative result. Cooperation with Andras Dan: www.astronomy.hu it is a comparision between L-OSC and LL(O3)-OSC. Date: 9.2.2008 - seeing 7-8/10; transp. 8/10 Scope: 9 TMB Apo f/18 (L) and f/9 (OSC) CCD: SXV H36 (crop) f/18 12x10 min (2 powermate) SXVF M25C f/9 12x10min Software: AstroArt4 image acqu. guiding, preprocessing: Maxim DL Processing: postprocess. PS CS2 and Pix InSight LE L-L(O3)-OSC: This image is a cooperation between Andras Dan and me. For acquisition of the O3 data Andras Dan used his 10 f/6.3 SC (operated on a Gemini 42 EQ mount and SXV H9 to which an O3 narrowband-filter was attached. My part was to blend this into L-OSC as additional luminosity channel in PS CS2. Unfortunalty we did not have a signal strong enough to be utilized as color channel... more data on my website: http://www.stargazer-observatory.com/ngc1514.html