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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...
Askar 111F APO telescope released with dedicated 0.74x reducer
Wednesday, May 20, 2026 by Richard Harris
The refractor market has become crowded over the past few years, but every once in a while a telescope shows up that feels like it was designed by people who actually spend nights under the stars. The new Askar 111F gives that impression right away. Built around a 111mm aperture with a 766mm focal l...
MOTHRA telescope 1,140-lenses to map the cosmic web
Friday, March 13, 2026 by Trey Abbe
A new astronomical instrument is being developed to capture the faint glow of the cosmic web with a scale and simplicity that set it apart. Built as an array of 1,140 individual objective lenses working together, the system trades a single large mirror for many smaller optics, enabling exceptional s...
How to use a telescope
Saturday, March 7, 2026 by Richard Harris
So you’ve just unboxed your brand-new telescope. Maybe it’s a sleek refractor, a sturdy Dobsonian, or one of those smart telescopes that runs on an app. Now you’re standing there asking what just about everyone asks the first time they look at a telescope and think seriously about ...