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Optolong L2 Dual Combo Filters Review
Thursday, July 30, 2026 by Jim Thompson
Optolong's multi-narrowband (MNB) filter is called the L-Synergy. It has a 7nm wide pass band at O-III and another at S-II. When paired with their existing L-eXtreme filter and a one-shot colour (OSC) camera, one is able to produce nebula images using the Sulphur-Hydrogen-Oxygen (SHO...
Optolong L2 Filters Tested: The April 2026 ScopeTrader Issue
Monday, April 6, 2026 by Richard Harris
Welcome to April, where galaxies are in full bloom. Here in Missouri the skies are finally starting to settle into something usable. If the pattern holds like it usually does, we tend to get our most stable stretch somewhere between April 10th and the end of the month. Those are the nights where ...
Adding Luminance: The missing layer for sharper astrophotography
Wednesday, June 18, 2025 by Richard Harris
On a clear night under a moonless sky, a dedicated astrophotographer sets up a high-end monochrome CMOS camera (think ZWO ASI6200MM) and wonders: will an extra luminance layer really make a difference? Deep-sky imaging is a game of photons. We spend hours capturing faint galaxies and nebulae through...