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Lou took this great image of a prom with his Lunt152 double stacked with a Quark

Welcome to Solar Chat! The best forum for Solar Astronomy
Moving forward from solar cycle 24 to 25

Search found 114 matches

by george9
Sat Feb 09, 2019 6:23 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Help me decide on solar setup
Replies: 8
Views: 1236

Re: Help me decide on solar setup

I am a fan of double stacking. Some say that is more important for visual than for imaging, and others find it very important for imaging. I am visual for H-alpha and neophyte imaging in CaK. You mention the LS80, and I love my LS80 DSII with B1800. I optimized it over time with a circular polarizer...
by george9
Wed Jan 23, 2019 3:02 am
Forum: This is SolarChat !!
Topic: What does 656.281 nm look like?
Replies: 12
Views: 836

Re: What does 656.281 nm look like?

Others are more expert than me, but it looks like you may need to go to higher temperatures and then work your way back. Based on the pattern of spots, 53.5 seems off band, but on the other end, 57.2 seems near the center line.

George
by george9
Mon Jan 21, 2019 10:01 pm
Forum: This is SolarChat !!
Topic: CaK set-up and first try, 20012019
Replies: 17
Views: 890

Re: CaK set-up and first try, 20012019

Very nice, Bart. When you say, "Baader CaK filter mounted in two separate filter cells," do you mean the Baader K-line filter, with the two filters separated into two cells? If so, I am curious why the separation. To change tilt? I did Baader CCD Blue -> Baader K-line (pair in original cell) -> sing...
by george9
Sun Jan 13, 2019 8:48 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 115
Views: 8841

Re: PST Etalon with a Quark, Log & Results

Very nice improvement. There was a bump of a prom with a filaprom to a subtle AR below it today (much like what I see above), but if these were taken yesterday, it would have moved by now. Amazing what the processing brings out (earlier post).

George
by george9
Wed Jan 02, 2019 2:58 am
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 115
Views: 8841

Re: PST Etalon with a Quark, Log & Results

Here is my setup. The main scope is a 155mm f/7. You see a 4" focuser, a Precise parts adapter, the DSII unit from an LS80, a spacer, an adapter to the Feathertouch, a 2" Feathertouch focuser with 2.5" draw tube (racked all the way out), the Quark chromosphere (with 4.2x), a Baader T2 prism, and a 3...
by george9
Wed Jan 02, 2019 2:46 am
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 115
Views: 8841

Re: PST Etalon with a Quark, Log & Results

Hi, Brian. I have a classic Quark chromosphere (i.e., not combo). As I said, pretty narrow at around .5-.6A. I don't image, but I can describe the visual. No more double limb. Prominences have varied brightnesses, some are same as the solar disk and some are dimmer, leading to a slight filaprom wher...
by george9
Wed Jan 02, 2019 2:30 am
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 1702

Re: Calcium K blocking filter

Thanks. I just can't think of a way to attach it to the Lunt, which has no thread at the end. I can rig up a clamp, but then it won't fit into the 2" focuser. Thin cellophane tape can hold it on, I guess.

George
by george9
Wed Jan 02, 2019 1:31 am
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 115
Views: 8841

Re: PST Etalon with a Quark, Log & Results

Won't the Quark etalon itself will serve as the blocking filter for the PST? That is, even if the Quark blocker were 20A (i.e., seemingly too wide), the etalon would block spikes for example 8A away from its centerline. Is the concern that the etalon has high shoulders and won't block enough of the ...
by george9
Wed Jan 02, 2019 12:31 am
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 115
Views: 8841

Re: PST Etalon with a Quark, Log & Results

Others are more expert on the PST, but yes I think the lenses you removed are the lenses that allow it to work with the f/10 objective of the PST. So you'll need them if you use the PST etalon before the Quark. I assume on the C8, you will need the collimating lenses. That's a little more complicate...
by george9
Wed Jan 02, 2019 12:21 am
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 1702

Re: Calcium K blocking filter

I got the Baader CCD blue and it works as advertised. 92mm f/7 to Baader CCD blue to Baader K-line to ND filter to PST#1 to R2 video camera produced a nice image today. That main active region was so bright. The best image, of course, was 92mm to Lunt B1200 CaK to PST#1 to R2. Two questions. Will th...
by george9
Wed Jan 02, 2019 12:06 am
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 115
Views: 8841

Re: PST Etalon with a Quark, Log & Results

(I agree after the Quark you would want bare etalon. And before the Quark you need collimation and enough energy reduction but no other blocking. George)
by george9
Wed Jan 02, 2019 12:03 am
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 115
Views: 8841

Re: PST Etalon with a Quark, Log & Results

I use my Lunt DSII unit (intended for an LS80, about 35mm aperture) before my Quark in my 155mm f/7 scope. I cannot visually detect a double limb at all double stacked. With the lone Quark, the double limb is very bright. I estimate my Quark in the 0.5-0.6A range. No idea what the DSII is because I ...
by george9
Wed Dec 26, 2018 1:04 am
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 1702

Re: Calcium K blocking filter

Wow! Did some testing today and was surprised by the quality of the result in my R2. I never thought to check if my 1.25" cells had threads on both ends. Out in the field, sure enough, no. The Baader K-line cannot take another filter, and neither can my PST#1 the way I mounted it in my cell. I made ...
by george9
Tue Dec 25, 2018 1:12 am
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 1702

Re: Calcium K blocking filter

> The Astronomik is the best UV/IR filter to have for CaK as it passes 393nm without attenuation. Mark, careful on the Astronomik if you ever need to replace. Your graph looks like the old Astronomik UV-IR filter, which is no longer offered. Now there is an L-1, L-2, and L-3. Their literature says t...
by george9
Tue Dec 25, 2018 12:09 am
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 1702

Re: Calcium K blocking filter

Awesome images, Marty. My Baader K-line arrived today (purchased on AM for a reasonable price). I wish there was something to image now to test it out. My main reason for trying without the Lunt is just that you don't really understand something until you do it yourself. All the vagaries of reflecti...
by george9
Mon Dec 24, 2018 5:17 pm
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 1702

Re: Calcium K blocking filter

Awesome, Bob! Thanks. These few message tell a lot and reflect a lot of experience. The Baader blue is not overly expensive, so that's easy enough. I don't have the Chroma 1nm yet. And of course, given I have the Lunt, I don't really need any of these. Just having fun experimenting, and also plannin...
by george9
Mon Dec 24, 2018 1:36 pm
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 1702

Re: Calcium K blocking filter

Thanks so much, Marty, Ken, and Mark. This is exactly what I was asking. Mark, on this one, "My current double stack CaK setup is as follows (in the direction of light) Baader K line, KG3, PST#1, PST#1, Edmunds optics 387/11," the Edmunds presumably clips the longer side of the band (down to 50% at ...
by george9
Mon Dec 24, 2018 3:37 am
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 1702

Re: Calcium K blocking filter

Thanks, Marty. Right now I own the PST and the Calcium k-line but not the Chroma or the blue CCD or the KG3. So I was deciding what I would need to add.

I also have a UV-IR cut but proved it passes 393nm well. But maybe the blue CCD would be the one to add.

George
by george9
Mon Dec 24, 2018 1:13 am
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 1702

Calcium K blocking filter

This topic has been covered in various threads, but I still wasn't sure of a few things, so I hope you all don't mind if I ask here separately. (I have Lunt B1200 CaK, and that is my main filter, but I am just experimenting separately from that. I realize that I could use the Lunt as blocking filter...
by george9
Tue Dec 18, 2018 5:20 pm
Forum: Solar Scope Modifications
Topic: Best current set up
Replies: 7
Views: 1004

Re: Best current set up

Thanks. So obviously I am new to this part. Hard for me to judge noise. On pixel size, I guess the 174 makes more sense for H-alpha, where you are likely at f/30 (say with a Quark). For CaK, where you are f/7, the 290 pixels are likely to make more sense. And the 1600 has intermediate pixels, low no...
by george9
Mon Dec 17, 2018 11:04 pm
Forum: Solar Scope Modifications
Topic: Best current set up
Replies: 7
Views: 1004

Re: Best current set up

Ok thanks. I will check. George
by george9
Sun Dec 16, 2018 4:11 pm
Forum: Solar Scope Modifications
Topic: Best current set up
Replies: 7
Views: 1004

Re: Best current set up

Thanks, Valery. Agreed. I was thinking of starting with an ASI 174MM mono as an efficient next step, which should cover the large refractor well enough. Then can decide what to move on to.

George
by george9
Sun Dec 16, 2018 5:03 am
Forum: Solar Scope Modifications
Topic: Best current set up
Replies: 7
Views: 1004

Best current set up

I am wondering what people might consider to be their best current solar set up of all the configurations they have tried. I think there is a lot of useful information inherent in the collective experience. I mean, all the things we have tried are good, but after all the tweaking and tinkering what ...
by george9
Tue Nov 13, 2018 12:41 am
Forum: Solar Scope Modifications
Topic: Lunt CaK B1200 + PST #1 yellow
Replies: 6
Views: 1117

Re: Lunt CaK B1200 + PST #1 yellow

Thanks, Bob. Yes, you have a similar effect. George
by george9
Sun Nov 11, 2018 9:37 pm
Forum: Solar Scope Modifications
Topic: Lunt CaK B1200 + PST #1 yellow
Replies: 6
Views: 1117

Re: Lunt CaK B1200 + PST #1 yellow

Some follow up. I finally got a decent chance to compare my Lunt B1200 CaK, the Lunt with the PST yellow filter, and the Lunt with a neutral density Moon filter (just to ensure any improvements weren't due to dimming the image to a better place in the imager's range). First image is Lunt alone, then...