Narrowband Filter Bandwidth Comparison (Brent)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 46 eps Ori · 48 sig Ori · 50 zet Ori · Alnilam · Alnitak · B33 · Flame Nebula · Horsehead nebula · IC 431 · IC 432 · IC 434 · IC 435 · LBN 940 · LBN 944 · LBN 946 · LBN 950 · LBN 953 · LBN 954 · LBN 958 · LBN 962 · LBN 965 · LDN 1635 · LDN 1636 · NGC 2023 · NGC 2024 · Orion B · Part of the constellation Orion (Ori) · Sh2-277 · The star Alnilam (εOri) · The star Alnitak (ζOri) · And 2 more.

Narrowband Filter Bandwidth Comparison

I wanted to do a review of MaxFR narrowband filters to figure out what I wanted to use on my hyperstar, and ended up finding a whole project.I compared 6 and 12 nm filters with Hyperstar and using a 0.7x reducer on my Celestron EdgeHD 9.25 SCT. The results didn’t match my expectations in a lot of ways, and I spent the last month figuring out why. I wanted to just make a quick video comparing the results, but I haven't seen explanations of this and felt it was worth exploring in detail. It is a little long, but I sure learned a lot about what is really going on and what you may want to consider in selecting narrowband filters. It is easy to buy expensive optics thinking they are 'better' or just go as narrow bandwidth as possible, that may not be the case especially if you have a focal ratio < f/4. I hope you can use this to figure out what kind of filters you may want to consider in a context I haven't seen much of on line. The calculations at the end of the video gave me a perspective I didn't have at the start.
https://youtu.be/rtFX92dZE_w

Final
Original
B

B

Title: signal comparison of filters

Description: rather than comparing images, I found it much better to compare signal strength

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Status	Advanced success
Started	...
Astrometry.net job	5426978
PixInsight job	7Y8D02I0XS3VYEWG5E1IQMXQ8V5EUUYP
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h37m59s.99
RA (top/left)	05h30m56s.38
RA (top/right)	05h31m47s.14
RA (bottom/right)	05h45m03s.41
RA (bottom/left)	05h44m10s.79

Dec (center)	-02°26′20″.6
Dec (top/left)	-01°16′51″.10
Dec (top/right)	-03°51′07″.4
Dec (bottom/right)	-03°35′17″.6
Dec (bottom/left)	-01°00′38″.6

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Narrowband Filter Bandwidth Comparison

Narrowband Filter Bandwidth Comparison

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