Optics Central - Telescopes, Binoculars, Microscopes & Telescopics Sights
After using many different types of light pollution filters – one filter that stands out the most is the L’eXtreme filter by Optolong.This filter boasts a 7nm range in the Ha (hydrogen) and Oii (oxygen) bands, which is comparable to dedicated narrowband filters – that offer 7nm. The L’eXtreme filter allows me to photograph deep-sky […]
This is part 3 of my series on astrophotography with filters. Last time I explained how the human eye sees in colour, using three different types of cone cells. We use one type for sensing red light, one for green light and one for blue light. The different channels are then recombined in our brains […]
This is part 2 of a series of blogs about filters and narrowband astrophotography. Bill explains how filters work, why you might use different filters and what a photo taken through a filter looks like. In the previous blog, I went into a bit of my own history: how from DSLR photography, I gradually moved […]
This is part 1 of a series of blogs about narrowband photography. In this introduction part, Bill talks about how – and why – he moved from taking astrophotographs with a plain DSLR to a monochrome CMOS camera with filters. It’s all about how you want the hobby to develop Astrophotographers aren’t normally wealthy people. […]