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The Optolong L-eNhance filter is fast becoming the talk of the astro town. It’s affordable for even the tightest astro budgets but also delivers exceptional performance for imaging emission nebula and super nova remnant from light polluted cities.
What is this filter though and how does it work? Why do you need it?
If you’re part of the growing number of astrophotographers that are imaging from their own astro backyard, then you’ll be dealing with city street lights and neighbour outdoor lights in addition to cloudy nights! So for those few clear nights we get, we want to make the most of it and the Optolong L-eNhance filter can help tremendously.
The Optolong L-eNhance filter is designed for use with one shot colour cameras (OSC) , such as a DSLR or cooled cmos camera dedicated for astrophotography. As example, I use a QHY168C.
This filter acts like an FM radio, tuning in specific channels. In this case specific light channels. It isolates the H-alpha, H-beta and OIII light transmission line while blocking the rest making it ideal for imaging with in light polluted areas.
Transmission lines the filter allows through:
- H-alpha:Â 656nm
- H-beta:Â 486.1nm
- OIII:Â 501nm
By isolating these wavelengths of light, the filter can achieve some stunning results when imaging emission nebula and super nova remnants. It can also be used during nights of moonlight to image. There’s many great images of deep sky objects taken by astrophotographers using this filter during clear nights that the Moon was up. That’s definitely a bonus. Did I also mention it’s a very affordable!
If you’d like to know more about the Optlong L-eNhance filter, watch my video below. In it I talk with Dr. Ron Brecher (AstroDoc.ca) about this filter and look at what his results have been with it.Â
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My story began more than 40 years ago looking up at the Moon with a small telescope my Father had. Encouraged by my parents, who bought me my very own telescope, a 4.5″ reflector, I began to explore the night sky from my family home backyard. Today I do astrophotography from my home in Kitchener, Ontario and also with remote telescopes located in New Mexico and Australia. Some of my images have won awards and have been featured online and in magazines.
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