First light with the Lunt CA-K module.

[Nigella Bryant]

70mm Stellaview AC, Lunt B1800 Ca-K module and Zwo ASI 178mm. False colour added in Photoshop CS2. Terrible seeing and taken through clouds to test the module which came yesterday.

[JeremyS]

Super @Nigella Bryant 👍🏻

[michael.h.f.wilkinson]

Nice result. I always do some deconvolution and unsharp masking in ImPPG with my solar shots. Seeing in Ca-K is often pretty bad. H-alpha is a lot easier in that respect

[Luke]

Congrats on the new gear! That's looking very promising. Was it easy enough to focus with no spots?

[David Smith]

Great Start. Welcome to the world of Ca-K!

[Nigella Bryant]

36 minutes ago, michael.h.f.wilkinson said:

Nice result. I always do some deconvolution and unsharp masking in ImPPG with my solar shots. Seeing in Ca-K is often pretty bad. H-alpha is a lot easier in that respect

Thanks Michael, it's a new learning curve from HA. 

[Nigella Bryant]

46 minutes ago, JeremyS said:

Super @Nigella Bryant 👍🏻

Thanks Jeremy, appreciated.

[Nigella Bryant]

23 minutes ago, Luke said:

Congrats on the new gear! That's looking very promising. Was it easy enough to focus with no spots?

Hi Luke, yes it's easy to focus although I use electronic focusers.

[Nigella Bryant]

10 minutes ago, David Smith said:

Great Start. Welcome to the world of Ca-K!

Thanks David, yeah, that's me all covered with HA, WL and now Ca-K, lol. 

[Kitsunegari]

Looks like you were shipped a good one !  Looking forward to the results from  a clear day.  

One thing I have noticed in all my calcium experience over the last 10 years is that it almost always works best in the "worst" quality of telescopes.   Name brand doesnt mean much to a calcium filter, so stellarvue , APM and astrophysics are just bumper stickers.  In fact, a scope with the most violet fringe you see on the moon is the best choice.   Typically a generic; $100.00 meade 90mm x 800mm standard plastic cell achromat will outperform just about any $1000.00 telescope out there at this wavelength.

Have fun discovering your new skill  ,   

 

 

[Highburymark]

Nice addition to the arsenal Nigella. Will be a great tool when we get a few more active regions. 
Reading previous post, didn’t realise calcium filters were also of variable quality - not just Ha. In which, it does look as if you’ve got a good one 

[Nigella Bryant]

2 hours ago, Highburymark said:

Nice addition to the arsenal Nigella. Will be a great tool when we get a few more active regions. 
Reading previous post, didn’t realise calcium filters were also of variable quality - not just Ha. In which, it does look as if you’ve got a good one 

Yes it can only get better. I too didn't realize that the quality of these filters were hit and miss. One more reason it was good to check it yesterday even if the sky was rubbish. I've been fortunate to get a good HA and Ca-K. Even my badder K-Line filter is a good one. Just been fortunate. I still find it incredible though given the price of these things.

[michael.h.f.wilkinson]

17 hours ago, Kitsunegari said:

Looks like you were shipped a good one !  Looking forward to the results from  a clear day.  

One thing I have noticed in all my calcium experience over the last 10 years is that it almost always works best in the "worst" quality of telescopes.   Name brand doesnt mean much to a calcium filter, so stellarvue , APM and astrophysics are just bumper stickers.  In fact, a scope with the most violet fringe you see on the moon is the best choice.   Typically a generic; $100.00 meade 90mm x 800mm standard plastic cell achromat will outperform just about any $1000.00 telescope out there at this wavelength.

Have fun discovering your new skill  ,   

 

 

Curious. Of course, chromatic correction is not an issue in a <1 nm bandpass, so expensive apochromatic scopes are overkill. Spherical aberration is usually more of an issue at the edge of the corrected range. A slow scope is bound to be better there. Having said that, I cannot say my APM 80mm F/6 hasn't disappointed in Ca-K, and seeing is almost always the limiting factor

[Merlin66]

I use a 1A DIY CaK 25mm filter on the ED80 and find it really needs an f10 beam (or better). This means stopping down to 60mm.

I have a 102/1000 (SW BD) for the PST mod which I may try on CaK.

Unfortunately here down on the coast the average seeing is pretty poor....

Such is life.

Full disk coverage with the TV x2.5 PM and the ASI 1600.

Edited April 1, 2021 by Merlin66
images added

[Nigella Bryant]

I see you're determined to get your point over Merlin66, lol 🤣😆🤣

Thanks though, it's appreciated.

[Merlin66]

Didn't post to wind you up....just to show that not all filters/ scope combos are the same. Following on Michael's comment.

 

[Nigella Bryant]

26 minutes ago, Merlin66 said:

Didn't post to wind you up....just to show that not all filters/ scope combos are the same. Following on Michael's comment.

 

Lol, you'd posted the same thing four times originally 🤣 just thought it was funny, kind of thing I'd do.

[Rusted]

Well done Nigella!

It looks as if NASA will be envious as soon as you get some favourable seeing.

[Nigella Bryant]

3 hours ago, Rusted said:

Well done Nigella!

It looks as if NASA will be envious as soon as you get some favourable seeing.

Who needs million dollar satellites, lol.