Aaron,
You appear to have crafted a broadband Hb filter from a #47 blue filter and a UHC filter. Normally the UHC filters pass the Hb and OIII lines but the blue filter greatly reduces the transmission of the OIII lines emphasizing the Hb wavelength. The UHC filter in turn blocks the blue below 460nm.
How much are the two filters you have used Vs buying a Hb dichroic filter?
Two thumbs up!
James
P.S. The blue image looks cool!!
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Good thinking, but it has quite a broad bandpass, so the image contains an overwhelming amount of parasitic light. See posts by The Smiths for true narrowband H-Beta. I'd call it localised 'White Light', really. Absorption/emission line imaging really requires very narrow bandpass filters, hence their expense, usually.
Stu
H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
Can you see the phenomen on the 393nm full disk of Peter and Claire (Averton) from shots of today?
Is it these darker formations of granulation you mean?
Triband C9.25
H-a: Quark Chromosphere with BF mod
WL: Antlia 500nm/ 3nm, 393 nm/ 3nm
Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo)
Player One Apollo Max + Mars MII
Barlows:
-2x Gerd Düring 2.7x
-2x TMB 1.8x
Dennis wrote: ↑Sat Jun 10, 2023 2:30 pm
Can you see the phenomen on the 393nm full disk of Peter and Claire (Averton) from shots of today?
Is it these darker formations of granulation you mean?
There are some visible in the C&P shot but the shot you mention has been stitched to gether and the lower hemisphere is badly blurred and the shot in general of a lower resolution overall.
I prefere to refer to my own published examples rather than using the works of others to discribe these details. Its the reason behind this post, StarHuggersFilter and why the hack I created exists in the first place.
The C & P shot is just not an example I can or would use. I have cropped the details in question for view in the previous thread I think that its been covered fairly well.
Thanks Dennis indeed for your interest.
Ok, i see. So its not connected or related.
Triband C9.25
H-a: Quark Chromosphere with BF mod
WL: Antlia 500nm/ 3nm, 393 nm/ 3nm
Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo)
Player One Apollo Max + Mars MII
Barlows:
-2x Gerd Düring 2.7x
-2x TMB 1.8x
http://brierleyhillsolar.blogspot.co.uk/ Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
