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Grakrob778

New scope, 2 months old. Has excellent views and on band images. Tuning with zero tilt on first etalon, second etalon required very little tilt.
Comes in case, shipping included CONUS. Paypal accepted. Price is $2500

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Grakrob778

Selling filter alone for $3800 with case and reducers. Paypal accepted and shipping in CONUS only. Fees for paypal to be covered by buyer please.

Grakrob778

IMG_0253.JPG IMG_0251.JPG IMG_0250.JPG IMG_0249.JPG Up for sale is all in pictures listed. Includes TZ-4, M68 TK, Baader 135mm D-ERF with 3D printed cell holder. 150mm F/8 scope, 0.4x & 0.7x reducers, everything needed to use this setup is included. Price i9ncludes shipping to CONUS only. Will ...

Grakrob778

If none else tries I will when everything arrives. Still waiting on my filter from SS.

Grakrob778

I don't know about indefinite back order. When I asked if he was covered up about 2 weeks ago, he didn't say either way. He had time to talk on the phone for 45 minutes though

Hoping to receive mine real soon. It's killing me LOL. Good luck

Grakrob778

I know this is regarding the sital but it's basically all the same with respect to the silver coatings. So I ordered a Zeiss spec BBHS prism this afternoon. Reading all this really makes me think Baader can't guarantee a completely safe view through our systems but if you think about it we have an E...

Grakrob778

Very concerning and interesting topic considering I am waiting for a Solar Spectrum filter to arrive. I found an image on Baader's site showing the use of their 2 inch Clickstop #2956100 https://www.baader-planetarium.com/en/solar-observation/h-alpha-accessories/baader-m68-tele-compendium.html I bou...

Grakrob778

Graham, Better to return the 135mm DERF and add some money and get a 160mm with a free 150mm aperture. In this case all your investments will work at 100% potential of your setup. Also images will be brighter with the same magnifications. Valery Hey Valery, I had to change telescope choice at last ...

Grakrob778

You mentioned you weren't going to get the BAADER BBHS diagonal....that was a smart decision. While BAADER doesn't widely advertise the warning but I have a copy from them....they say it shouldn't be used with Ha as it passes radiation to the users eye that normal diagonals and the regular click lo...

Grakrob778

I also agree with Rusted's points. Just thinking though what are we trying to prove? Is it that the Quark is good for the money, ore something else. Quarks are just good seconds and random, Just depends on what you want out of one, In the right hands and with a good setup they can be made to give v...

Grakrob778

Graham, Better to return the 135mm DERF and add some monet and get a 160mm with a free 150mm aperture. In this case all your investments will work at 100% potential of your setup. Also images will be brighter with the same magnifications. Valery Hey Valery, I had to change telescope choice at last ...

Grakrob778

Thanks Terry. I'm just starting out with my cheapo spectrometer and didn't know if I could use an LED for calibration.

Grakrob778

Hello Rusted! Sorry for just seeing this. So, I have an EQ6-R mount. The mount will either be placed in my ROR observatory which has 900 pounds of concrete in the ground and a 12" diameter pier or on my Berlebach planet tripod. I have four, 1/2 x 4.5 inch concrete anchors holding down my pier t...

Grakrob778

Hello, I am looking for a reasonable halogen light source for my Thunderoptics spectrometer. Doing a quick search they seem very expensive. Any help would be much appreciated!

Grakrob778

Yes, the tubes are very long and even though they are all screwed together or click locked there is still some sag. This is evident in that my centre-line is at 23.5 degrees and not 27 degrees as it should be. Alexandra Alexandra, Your report is fantastic. I have a RG18 0.3A on order. Do you rememb...

Grakrob778

Waiting on mine to arrive too. Thanks Christian!

Grakrob778

*Sold*

Grakrob778

Hello, Offering for sale my Coronado 90mm BF15 DS for sale. Price is $5200 shipped. This is the Solarmax 3 model and the DS 90mm etalon is the SM2. The ITF has been replaced with a BeleOptik. The scope and DS filter come in their own cases. All manuals and Cemax kit are included. I have the original...

Grakrob778

Valery,
I am taking your advice along with Bart's opinion and have changed my mind..
I sent Teleskop-Express an email asking if they can cancel the order and apply the credits towards a Bresser 152/1200mm instead. Hopefully that will work.

Thanks,
Graham

Grakrob778

Valery,
Thanks for input. Still at 102mm F/11 with 4x Baader telecentric, SS @ 0.3A will be at 0.3A, not 0.5A. I'm interested in being at 6562.8 A @ 0.3A. Visually 90mm DS is very good. I want to see what 0.3A looks like being on band.
Respect to you,
Graham

Grakrob778

Hello, I am starting a new thread on this forum to get some more insight on my new Ha solar scope build. I would appreciate some advice. I have ordered the Tecnosky 102 F/11 refractor from Teleskop-Express. I have placed a deposit on a Solar Spectrum RG18 0.3A filter through Alpine Astro in the USA....

Grakrob778

Bob Yoesle wrote: ↑Mon Jun 28, 2021 12:59 am Yes. This is how "richview" tuning in the Coronado etalons is accomplished. Compressing the spacer(s) reduces the etalon gap distance, and blue-shifts the etalon.

Thank you so much Bob.

Grakrob778

Can someone tell me if by decreasing the distance between an air spaced etalon if that also decreases the output wavelength?

Grakrob778

I am interested.

Grakrob778

Ridiculous amount of detail and extension!!!

Grakrob778 · Re: AR2794 WL 22/12/2020 Amazing detail!

Amazing detail!

Grakrob778 · Re: AR2794 WL 22/12/2020 Amazing detail!

Amazing detail!

Grakrob778

That's a nice looking scope James. I only have one Ha scope. Yes, I agree on the wooden tripods. Once I saw what they were I had to complete my setup with one. I can't stand the metal clanking anymore. Going through the house carrying it out, clanking. The Planet is one size down from the most heavy...

Grakrob778

Re-reading the original post, Coronado appears to be the only manufacturer which does not specify single stack and double stack etalons. Presume that’s because of the way they are tuned?? Hope the new filter is a success - will be interested to see how it performs https://www.meade.com/coronado-sol...

Grakrob778

Hey James,
I think it is made in Mexico but assembled here in the states. The tripod is a Berlebach Planet from Germany. Its a beautiful white ash tripod I purchased from B&H. Check their site out. They have a lot of nice wooden tripods.
Graham

Grakrob778

9.jpg The scope is front heavy for sure. I wish Coronado the best as well. Just like in everything, if you want a premium product you must have premium quality. Outsourcing to Mexico for cost savings sacrifices quality. In the auto industry Mexico is no where near the quality we make in Tennessee a...

Grakrob778

Could an apochromatic SMIV be in the works? I think that would be a stretch right now.. Glad you are enjoying your scope though! I'm old school. Was lusting after a 90mm Coronado 14 years ago. Oh well on Meade's support. I do know they sent me a new blocking filter for free and let me keep the old ...

Grakrob778

Jumping in here with a few personal thoughts... I have a hand selected SM90ii scope that performs superbly, It has been heavily modded with decent tube rings and a feather touch focuser, it's a delight to use! There's nothing i'd love more than an external DS etalon to go with it (s2 or s3 I don't ...

Grakrob778

https://www.meade.com/solar/coronado-solarmax-ii-90mm-double-stacking-etalon-with-richview-tuning-system.html Meade still carries the 90mm SMII etalons. Few of the listed dealers carry them anymore. I bought my SMII 90 DS last May for 3,400 dollars on a closeout From Woodland Hills. 2000 dollars of...

Grakrob778

That's great that they are compatible, they should be. Do they sell the stacking etalons separately for the SMIII yet? I don't think I have ever seen them listed separately. If they don't then one using a SMII etalon still has the option to upgrade to DS later if he/she wishes after buying a SS sco...

Grakrob778

Hello, I bought a 90mm SM3 SS scope earlier this year. I bought a SM2 90mm etalon this week. The SM2 etalon threads into the SM3 etalon without an adapter. Also the SM2 etalon threads directly into the scope for tuning before double stacking. Hope this helps. Have a great day. Graham 1.jpg 3.jpg 4.j...

Grakrob778

Very nice Pedro.

Grakrob778

Very nice Pedro.

Grakrob778

Thank you Paul. I will go that route. I will check into your plugin as well. Many thanks. Graham

Grakrob778

Hello, I was wondering if anyone could share what settings they use for Firecapture using the Airylab SSM? It may be self explanatory but I don't understand it quite yet. I first used mine this past weekend and watched the readings. Should I delay the time to 1 second before triggering or keep at ze...

Grakrob778

Thank you for your help!

Grakrob778

15.jpg 18.jpg 20.jpg 19.jpg It appears all sub 6A filters look the same, so I did not post pics of them, but do have them if you want. They appear to leak green/yellow light when compared to the ZWO CCD Ha filter. All ITFs are sealed around the edge. None appear to have rust. After comments I do wo...

Grakrob778

I will check tomorrow. I get your point now. I have three to test. You mean the 6A sub nanometer filter on the eyepiece side. Understood and thank you. Will post results.

Grakrob778

Pretty sure these are like Bob Y. advised me..grossly deteriorated dielectric coatings. I removed the flats and shined a flashlight through the back, which is black. You can clearly see the deterioration. On a good note I had a good flat that I placed in the new diagonal. This with the Beloptik ITF ...

Grakrob778

1.jpg 2.jpg 3.jpg 4.jpg 5.jpg 6.jpg 7.jpg 8.jpg Hello and first post here. I need some help. I bought a SM3 90mm scope with a BF15 earlier this month. I decided to go ahead and also order a replacement ITF from Oliver at BelOptik in Germany. Then I decided to inspect the ITF in my current BF15 and ...

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