What would be the sequence of adapters/extenders to add a narrowband filter (ZWO 1.25" Duo Band or L-eNhance 1.25" filter). Thanks
peterr1945 It lies on the back focus requirement of your optical adapter. Here are some 55mm connection way for your reference. https://astronomy-imaging-camera.com/tutorials/best-back-focus-length-solutions-55mm/
