SolarChat!

Brett

Hello I have at last tested the Omega filters that I bought in 2014. I have been on a career change path over the past 8 years. Anyhow, I am back in the hobby. Mark Townley sent me a filter way back that I am using as an erf. Maybe he will see the post and remember. The config needs to change, howev...

Brett

Thanks Mark, I will do that.

Brett

Beautiful! I was trying to image, but seeing was very poor.

Brett

Mark and Montana, the time is actually UT +2. I should correct this to UT. I wish I had slightly better resolution, but at this stage its all my 71mm scope can do (but very pleased, I think the little guy is a real worker). The images are all slightly off band as I was playing with the dial on the Q...

Brett

Wow these are stunning Mark, well done!

Brett

Just noticed this in my images. Is this an ellerman bomb?

Brett

Thanks Mark. This is exactly what I thought. What do you propose the risks are? The baader UV is a reflection filter. So I'm assuming that it should easily handle the smaller focus point of heat by reflecting? The other consideration being the smaller focus point back to the objective. This may be a...

Brett

I have a Baader D Erf which I need to install internally into my 127mm refractor somehow and sometime. But was thinking of using my 1.25 inch Baader UV/IR filter with this refractor in the meantime. I cannot see how this would not work when screwed onto the Quark nosepiece. But everyone uses 2 inch ...

Brett

Fantastic! And I love the explanations as well. Thanks

Brett

Thanks Matt

Brett

Thanks you guys. Think I will use dial 0 then from now on (first image).

Brett

Well I must admit, I am chuffed with this one. A 12 panel mosaic proved some challenges. But Ive got a nice big image full of pixels. The dynamic range also proved a challenge, especially on the rim. Nevertheless, I am done with this one. Until weather clears and on to the next. https://www.astrobin...

Brett

Thanks for the advise Mark. May I ask why the first image?

Brett

I spent some time this afternoon to see if I can get the correct dial setting for my Quark. I took 6 images, but unfortunately the the last two at dial -1 and +4 had some rotation difficulty as I had to flip the scope. But I think on band is one of these 4. My guess for now is the second picture in ...

Brett

Thanks Paul

Brett

I have the ZWO Asi 174. I tried all different settings today and the best I can get at full resolution,1920, is about 50fps for about 30 seconds before running out of most ram which after the fps drops to avg 25. When doing ROI at 1280, I can get 70fps for much longer than I care for. Probably indef...

Brett

Incredible. Great work, thank you for doing this.

Brett

Hi all, I would just like to finalise this post by saying that my issue with the Quark has been resolved. It was sent back to Daystar and they confirmed the faulty etalon. I received a new etalon in my Quark and the issue is gone. I am one happy guy now.

Brett

If someone maybe has an Omega Bob eBay CaK filter which is from a relatively good batch, and would like to sell it, please let me know. I would like to get a second one to experiment with the effect of double stacking with mine.

Thanks

Brett

Mmm, okay that is interesting. I have never thought about it like this. But then, to bring me to the collimator lens, be it a positive or negative lens, if the f ratio needs to be the same as the main objective focal ratio (in this case f/12.5) one can never fit the "full diameter" of the ...

Brett

Thank you for the reply. Only one thing that still does not make sense to me: if the light cone has a diameter of 12 mm at 850 mm behind the objective, how can the Sun's diameter here be 20.5 mm? This is then larger than the diameter of the light cone? In other words, if I were to add the Barlow or ...

Brett

Which of the two filter links you mentioned did you use?

Brett

Can I use this formula to calculate the width of the light cone coming from the main objective? Reason I am asking is I am considering a negative lens, added at its focal lentgh inside the light cone. With a 1000mm FL and 80mm apperture, say a 150mm FL negative lens (13mm diameter) is added 150mm in...

Brett

Hi Ken

I will see how I can fit everything in the design so that I have the correct parameters. Will do a sketch in the meantime.

Why did you mention in your previous post that a slit of 10 mm is problematic?

Brett

Ken, will this grating do? It is on the bottom of the page, in the 4th column:

http://www.optometrics.com/reflection-gratings

Specs are 30mm x 30mm, 1800 lines/mm, Blaze = 500nm

Brett

Hello Ken Thank you for this info. I will head over check out some of the yahoo files. Camera is a monochrome QHY5 L ii CMOS sensor at 3.7 microns. But I may upgrade to a 5.6 micron in the next two years, so I will go for an approximate 10 micron gap. As for a second lens to focus the image onto the...

Brett

Any opinions on this slit? Width is 150 microns. The photographic version is much cheaper, dont really know if I should rather get that one.

http://www.lenoxlaser.com/index.php?dis ... duct_id=17

Brett

Okay I have now figured out that if using an achromatic objective for the collimator, it should be placed its focal length away from the slit. So in theory I would have a 80mm f/12.5 objective, placed from this a slit at 1000mm (at focal plane), then placed 250mm away from slit a 20mm achromatic len...

Brett

In my question number 2 above, I assume that the negative lens should have a focal ratio that matches the focal ratio of the main telescope, in my case f/12.5. How far should this be placed from the slit on main telescope side and grating on the other side? Merlin66, it seems that you made a paralle...

Brett

Thank you for the info so far. I have an 80mm , 1000mm fl telescope objective. From what I gather, this should be focused on a slit 1000mm away. This can be done using the focuser of the blue telescope in Highfnum's photo. So now, this brings me to a couple of questions: 1.) Is there a guideline as ...

Brett

How does one calculate the Sun's diameter inside a light cone? I am familiar with the concept of calculating the Sun's diameter at the focal plane, eg for a 1000mm focal length telescope, the Sun would have a diameter of just under 10mm at the focal plane. The reason I am asking, is if I add a negat...

Brett

Thanks you guys. I will read up a bit more and ask. The information on the web I found on spectroheliographs is quite vague.

Brett

I have been wanting to build a SHG for a long while now. I will finally have some time towards the end of the year and would like to get my resources ready in the meantime. Any guidance on where to start would be appreciated.

Brett

I have no words, just incredible.

Brett

Mark, the thing is that the outside surfaces of the Quark is as clean as a whistle. So the dust bunnies are then somewhere inside the Quark. I am afraid to open up the Quark to not lose my warranty. But, the two dust bunnies are not the only culprits. All those "worm like" thingies are als...

Brett

Hello Mark, I just took a defocussed image with my Cellphone camera through the Quark. The telescope is the William Optics ZS71. I doubt that these are defects of the cellphone camera. This image shows what I am seeing with my eyes as well.

Brett

Yes, not very excited. I'm in South Africa, so it is going to be a mission to get it to there and back.

Brett

Hi Mike Yours surely seem a lot better than mine... Unfortunately I am waiting for my planetary cam to get back from QHY. It seems that I am having a streak of bad luck coming my way equipment wise the past few months. I must say that, if it was not for these "spots" all over my FOV, I rea...

Brett

In a previous post, I mentioned that I am seeing dirty spots through my Quark. I have cleaned the surfaces of the Quark, and the problem persists. It is definitely not in other parts of my optical train. Only when rotating the Quark, does this image (attached) also rotate. The image attached was tak...

Brett

Thank you for this info Mark. It answers my question from my Glatter thread as well where I asked how to judge when I am on band. I will test tomorrow and see where the disk is the darkest.

Brett

I saw this one today with only my second light in H alpha. First light was a partial solar eclipse...

Great image BTW!

Brett

Mark, I was afraid that this might still be the problem... Well at least I found some adapters so that the rest of my imaging train consists only of screw in adapters. How will I know when I have found the on band position? I spent some time today fiddling with the dialing knob. The best contrast an...

Brett

I have read about the Glatter Paralyzer in the past and I am wondering if this will help to get the Quark parallel to the telescope light cone. So this will be inserted into the focuser drawtube and then the Quark will fasten to the Paralyzer with its 1.25 inch insertion. http://www.firstlightoptics...

Brett

Alexandra, I wanted to ask you about your dialing tune test. Why does the blue shift side appear as a "gradient" in your images? I realize that it is not a gradient from the optics, but it appears something like a gradient. My understanding was that blue shift would change the image unifor...

Brett

Alexandra, thank you for clarifying the flare issue. Just shows how little I know about the Sun. What I meant was I could easily see all the plage around the AR's as well as the limb prominences. BTW there was one huge prominence today (It looked A or E on the Daystar website: https://www.daystarfil...

Brett

I would just like to inform everyone that I went ahead and took the advise of getting the William Optics 71 ZS scope. The Quark also arrived with it as well as a Televue 32mm plossl. I used a Baader D ERF on the front of the telescope. Here are some of my experiences so far: Firstly, I have no H alp...

Brett

That is some pretty insane CaK prominences!

Brett

Mark, I am planning on a dedicated 60mm f/15 telescope for CaK. But it would be nice to use it now and then in the 127mm f/7.5 refractor as well.

Brett

There are a couple of cheap brand focal reducers on the market to use with the Quark, but are there any reducers that will be better in terms of dispersion and spherical abberation that would go well with the Quark and a cmos camera? Also, would a 1.25 inch or 2 inch reducer be better fitted to the ...

Brett

I have a Bob 2A CaK filter. I also have a broadband CaK filter that Mark here from SolarChat was kind enough to post to me. I have not had a chance to try them, but I was wondering if there are any ERF's on Bob's site for CaK. I do realise that if I use with a small refractor (I will use with refrac...

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