Optolong L-Synergy Filter*** Put simply, the L Synergy filter is for more advanced users who want to shoot nebula images in a true Hubble "SHO" palette with their one shot color camera. To do this, you'd combine two image stacksone exposed through the L Synergy, and the other exposed through Optolong's L eXtreme filter. **Need BOTH filters? Get the L2 Dual Combo set instead, HERE. The Optolong L Synergy is a dual 7nm narrowband filter compatible with DSLR cameras, color CMOS