A revolutionary magnetic narrowband filter with glow-in-the-dark grip and minimal vignetting even at wide angles — developed and tested in the field.
📅 Launch Date: August 12, 2025 at 8 AM Pacific
🔗 Where: MAVEN Wave 3 Kickstarter Campaign
The hydrogen-alpha (H‑Alpha) wavelength (656 nm) is the key to revealing glowing nebulae and other emission-line targets in deep sky photography. Traditionally, H‑Alpha filters have been reserved for modified cameras or internal filter systems — and even when front-mounted, they’ve introduced frustrating side effects like internal reflections, halos, and clumsy screw-on designs.
RAW Files from Multiple Focal Lengths
I tested the MAVEN H‑Alpha filter using a variety of lenses — from wide 15mm to 135mm telephotos — and the filter held up impressively across the board. There was no unusable vignetting even at wide focal lengths, and image quality remained sharp, particularly in the hydrogen-emitting regions of the sky.
If you’d like to look at some sample RAW files (converted to DNG for compatibility), you can download them below:
🚫 Not for Solar Imaging
While the filter sits on the hydrogen-alpha wavelength, it is not designed or rated for solar use. Please don’t point it at the sun — it’s not a solar telescope filter and does not provide the required safety levels. I can’t stress this enough – do NOT, under any circumstances, even if you think you have it all figured out and things will be ok, do NOT, and I repeat DO NOT point your camera directly at the sun. You’ll wreck your sensor at best, and at worst, you’ll wreck your eyeballs. Seriously, just don’t do it.
The MAVEN H‑Alpha filter is an exciting tool for night sky photographers, especially those working with unmodified DSLRs or who want an easier way to capture narrowband data without dealing with internal clip-ins or camera mods.
Here’s what stood out most in testing:
🌟 Magnetic Mounting = Effortless Use
The filter snaps on securely with MAVEN’s magnetic system, eliminating the frustration of threading filters in the dark. It’s easy to swap mid-session—even with gloves on—and perfect for portable setups or fast-moving conditions without the need to exposure your camera’s sensor to the elements.
🌙 Glow-in-the-Dark Knurling
A simple but genius addition: the outer ring glows just enough to help you find and orient the filter without needing a flashlight. It’s deeply knurled for excellent grip, even with cold fingers.
✨ Minimal Vignette and Halo Design
Unlike many other front-mounted H‑Alpha filters, the MAVEN design virtually eliminates vignetting, ghosting, halos, and flaring, even on fast wide-angle lenses. I personally tested this filter in the field and was amazed by the clean star profiles and clarity in every shot. Thanks to the wider 20nm bandwidth, this is a great Ha filter for photographers who prioritize ease of use with the stars still seen easily on-screen, and those just stepping in to HaRGB imaging.
📸 Compatible With Stock Cameras
While astro-modified sensors still offer better red sensitivity, this filter works well on stock DSLRs and mirrorless cameras, delivering rich detail on emission nebulae with longer exposures.
🚧 Low Barrier to Entry
You don’t need to modify your camera to start capturing H‑Alpha data. This filter makes narrowband accessible to a much wider audience.
That said, there are a few practical trade-offs to be aware of:
Despite this, the ease of use, build quality, and halo-free optics more than make up for the wider passband—especially for photographers looking to get started with narrowband without the cost or commitment of modifying their gear.
This project is personal — I originally brought the H‑Alpha filter concept to the MAVEN team, and had the honor of helping with the development, testing, and refinement process. Together, we made something that I truly believe will benefit night sky photographers everywhere.
✅ DSLR Users Rejoice
Many H‑Alpha filters on the market are designed to fit inside mirrorless or astro-modded cameras as clip-ins. That leaves DSLR users out. The MAVEN filter solves this by attaching magnetically to the front of any lens, making it one of the easiest ways for DSLR users to shoot in narrowband.
🔍 Works With Both Stock and Astro-Modified Cameras
With stock cameras, it still gives a strong signal in the red hydrogen channel, though you’ll need longer exposures to get equivalent signal.
With astro-modded cameras (full-spectrum or H-alpha enhanced), the filter excels — delivering detailed, contrasty nebula data.
The MAVEN H‑Alpha filter is an optical bandpass filter that isolates a ~20nm window centered on 656nm, the wavelength emitted by excited hydrogen gas in space. By only allowing that red light through, it filters out much of the visible spectrum — giving you a punchy, contrasty image of emission targets like the Rosette Nebula, California Nebula, and North America Nebula.
Its front-of-lens design makes it compatible with any camera body and lens combo, provided you use the correct filter size.
The short answer is “no, it doesn’t replace an astro-modification” — but it’s the next best thing if you’re not ready to modify your camera. An astro-modded sensor still collects more red light overall, but pairing it with this filter gives you stunning narrowband performance with a portable, modular, and non-destructive setup.
For stock camera users, this is the easiest and safest way to dip into narrowband astrophotography — and see real results – although it will require significantly longer exposure times to yield similar results.
One of the most exciting uses of an H‑Alpha filter is blending its deep-red emission detail into a full-color image. The process is simpler than you might think:
This workflow lets you take full advantage of narrowband detail while keeping the natural color and depth of RGB photography. The MAVEN H‑Alpha filter makes this process more accessible than ever—especially for users with stock DSLRs or minimal post-processing experience.
This is the first magnetic front-mounted H‑Alpha filter I’ve used that I can recommend without hesitation. It’s fast, reliable, and designed for real-world use.
📅 Available August 12, 2025 at 8 AM Pacific on Kickstarter.
🎯 If you shoot nightscapes, nebulae, or want to get into HaRGB imaging to take your Milky Way and nightscape images to the next level, this is the filter to watch.
Ideal for: Wide-field astrophotography and portability
Price Range: $320–$380
The Move-Shoot-Move NOMAD is the latest addition to the Move-Shoot-Move lineup, known for lightweight and user-friendly trackers. It’s designed for wide-field astrophotography, ideal for capturing the Milky Way and other celestial wonders.
Key Features:
Why It’s Great: Perfect for beginners and travelers seeking a portable tracker without compromising quality.
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4 Comments
Michael Palozzola
Posted at 10:40h, 08 AugustIn regards to this filter and solar. I know it is not a solar rated HA. But can you combine a high stop ND(15 18 etc) and this filter to achieve safe solar viewing?
Marc Rassel
Posted at 18:30h, 01 NovemberYou could, yes, but at your own risk of course. It won’t give you the same results as a dedicated solar telescope, though can provide some enhanced texture with stacked image processing.
Garry McDougall
Posted at 04:25h, 21 SeptemberHi I am interested in the magnetic h alpha filter.Is it available for a variety of different size lenses and do you ship to Australia thank you.
Marc Rassel
Posted at 18:29h, 01 NovemberAt least to start, this will be available in 82mm size only and yes, it can be shipped to Australia. Retail sales should begin in the early part of 2026.