Search found 500 matches

by Bob Yoesle
Wed Feb 13, 2019 8:54 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 104
Views: 3381

Re: PST Etalon with a Quark, Log & Results

Hi Marty, In some of your most recent images I'm seeing just a hint of the double limb, which is not obtrusive. In others I'm seeing processing artifacts, not the double limb of the photosphere: M Wise highlight.jpg Note the irregular hard edge appearance all along the limb and at the indicated loca...
by Bob Yoesle
Tue Feb 05, 2019 3:56 pm
Forum: This is SolarChat !!
Topic: New Year, New Setup & the Blocking Filter Experiment - 3rd February
Replies: 22
Views: 438

Re: New Year, New Setup & the Blocking Filter Experiment - 3rd February

"I think as we become more seasoned and experienced solar observers our expectations in terms of how even the illumination of our filters are gets higher. I think back to some of my earlier setups and the illumination of the etalons and while I was happy then I wouldn't accept it now." Hope the new ...
by Bob Yoesle
Mon Feb 04, 2019 3:03 pm
Forum: This is SolarChat !!
Topic: CaK, 03022019
Replies: 17
Views: 327

Re: CaK, 03022019

Hi Bart, Wonderful images! The Baader 0.4 reducer is the "research grade" to mate with the TZ3 and restores the original f ratio / EFL of the system. Haven't had a chance to use it yet but looking forward to when the weather improves. Looks indeed like we're on the same path... The Chroma Tech CaK f...
by Bob Yoesle
Sun Feb 03, 2019 8:25 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Available external DS etalons??
Replies: 25
Views: 640

Re: Available external DS etalons??

ED 80 might be better for the CaK, but hard to say w/o having accurate data.

You set up sounds like it will be ideal. Two thumbs up!
by Bob Yoesle
Sun Feb 03, 2019 8:14 pm
Forum: This is SolarChat !!
Topic: New Year, New Setup & the Blocking Filter Experiment - 3rd February
Replies: 22
Views: 438

Re: New Year, New Setup & the Blocking Filter Experiment - 3rd February

Awesome and beautiful scope Mark, and the contrast uniformity looks great. I'm assuming it uses an internal 60 mm filter for minimum field angle magnification. It sounds like the front etalon you tried was a dedicated DS filter, and apparently required excessive tilt. I experienced this with a 60 mm...
by Bob Yoesle
Sun Feb 03, 2019 6:09 pm
Forum: This is SolarChat !!
Topic: Lunt Stopping Making CaK Modules?
Replies: 14
Views: 336

Re: Lunt Stopping Making CaK Modules?

Production cost and demand realities are what they are.

But I don't think CaK will become a unicorn, dino-dodo, etc. It seems DayStar has (and perhaps SolarSpectrum as a custom order) and will likely keep the CaK option available in the mica based etalons.
by Bob Yoesle
Tue Jan 29, 2019 5:25 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 104
Views: 3381

Re: PST Etalon with a Quark, Log & Results

Now you're cooking Marty! Pretty much right on band to me. The normally processed greyscale bright and dark mottles look exactly as they should, and there is no discernable double limb.
by Bob Yoesle
Fri Jan 25, 2019 4:32 pm
Forum: Solar Scope Modifications
Topic: Lunt CaK diagonal modded to straight through
Replies: 7
Views: 259

Re: Lunt CaK diagonal modded to straight through

Thanks guys, I guess I'll give a little more time for a response, and then try again. Mark, it sure looks like a Baader T2 device, but I looked at their site and didn't find this particular implementation. So I'm hoping to hear back from Astrograph... Seems like it would be ideal for a modular syste...
by Bob Yoesle
Fri Jan 25, 2019 5:15 am
Forum: Solar Scope Modifications
Topic: Lunt CaK diagonal modded to straight through
Replies: 7
Views: 259

Re: Lunt CaK diagonal modded to straight through

Very cool Bart. I'm looking at a total redesign of my CaK module, but hitting a roadblock with filter mounting implementation with some ability to tilt multiple individual filters fairly close together. I found this nifty tilt adapter which seems like it would be perfect, but it says "not in stock,"...
by Bob Yoesle
Thu Jan 24, 2019 12:30 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: What camera?
Replies: 23
Views: 800

Re: What camera?

I have been struggling to get my 2 point grey cameras to work with Firecapture recently and so I don't fancy another to add to the pile... I recently had the same problem with my PGR Chameleon, downloading the latest SDK fixed this - it might get your current two PGR cameras working again. BTW thei...
by Bob Yoesle
Wed Jan 23, 2019 2:07 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 104
Views: 3381

Re: PST Etalon with a Quark, Log & Results

Thanks Mark - I was lucky to be able to get these etalons when such quality was available and still relatively affordable. I should note that the above images were wavelet processed in RegiStax6, but had no additional post processing, and the their RG630 ERF's were replaced by a single Baader DERF f...
by Bob Yoesle
Tue Jan 22, 2019 11:36 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: What camera?
Replies: 23
Views: 800

Re: What camera?

... you can get this chip in ZWO, PGR and Basler versions, does it make any difference? Just an FYI, A couple of years ago I fried my Point Grey Chameleon's sensor when the Baader film filter I made intermittently partially blew off in the wind. Point Grey replaced the entire camera for a standard ...
by Bob Yoesle
Tue Jan 22, 2019 10:06 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 104
Views: 3381

Re: PST Etalon with a Quark, Log & Results

One thing I do notice is that depending on the processing I can "pull" the double edge out of almost any image... Hi Ken, For me it was a long learning curve to discover exactly what an on-band image should look like. I still have trouble at times, especially in the typical relatively poor seeing I...
by Bob Yoesle
Sat Jan 19, 2019 7:27 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 104
Views: 3381

Re: PST Etalon with a Quark, Log & Results

Hi Marty, Upon reflection and going back to some references, I believe there could be a couple of things going on with your images. The recent images are better with regard to the double limb, but it is still subtly revealing itself. According to Bray & Loughhead in The Solar Chromosphere (1974, pag...
by Bob Yoesle
Sat Jan 12, 2019 2:15 pm
Forum: This is SolarChat !!
Topic: Quantum 6 setup
Replies: 14
Views: 492

Re: Quantum 6 setup

Not until reading Bob Yoesle's writings about the dreaded double limb did I realize that it was undesirable and must be eliminated. Yes, it's true - apparently a cult of righteous Double Limb Slayers has developed and is dedicated to eliminating for all mankind the dreaded Double Limb! Double Limb ...
by Bob Yoesle
Thu Jan 10, 2019 6:16 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: ERF and UV filter with 152mm f8 refractor and Quark
Replies: 6
Views: 402

Re: ERF and UV filter with 152mm f8 refractor and Quark

Some would say no, and that it's over-kill, but I would go full-aperture for the best IR reduction. Depending on the scope mechanicals, you could also consider an internal ERF such as a smaller ~ 100 mm or so Baader, BelOptik, or Lunt ERF placed within the OTA. I also would consider a 50 mm KG3 filt...
by Bob Yoesle
Tue Jan 08, 2019 11:27 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 104
Views: 3381

Re: PST Etalon with a Quark, Log & Results

These are a major improvement Marty! Very much closer to being on band I would say.
by Bob Yoesle
Thu Jan 03, 2019 2:50 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Solarscope SF 70 filter DS
Replies: 8
Views: 488

Re: Solarscope SF 70 filter DS

Very Nice - detailed and contrasty - especially for SS.
by Bob Yoesle
Thu Jan 03, 2019 2:02 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 104
Views: 3381

Re: PST Etalon with a Quark, Log & Results

Looks like you nailed it Mark! Your greyscale is perfect:

https://www.flickr.com/photos/brierleyh ... otostream/
by Bob Yoesle
Wed Jan 02, 2019 7:28 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 104
Views: 3381

Re: PST Etalon with a Quark, Log & Results

Hi Marty, "... and if that kills the double limb, I'd be happy with that for the time being until I can figure out something better that is affordable." What do you consider affordable?! "Better" H alpha performance (especially double stacked) and "affordable" is kind of working at odds with each ot...
by Bob Yoesle
Wed Jan 02, 2019 3:44 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 104
Views: 3381

Re: PST Etalon with a Quark, Log & Results

Very nice implementation George! After the Quark, you are over f/30 and don't need the lenses. RE: PST etalon. Remember, an air spaced etalon is a different beast than a solid spaced etalon, and suffers from the decreased refractive index of air compared to a solid spaced etalon, and field and instr...
by Bob Yoesle
Mon Dec 24, 2018 7:28 pm
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 767

Re: Calcium K blocking filter

Hi George, If I were you, I'd just add the PST to the Lunt as described, and get a pre-filter attached to the front of the Lunt module for larger aperture use: https://www.edmundoptics.com/p/394nm-cwl-50mm-dia-hard-coated-od-4-10nm-bandpass-filter/19839/ or https://www.edmundoptics.com/p/390nm-cwl-5...
by Bob Yoesle
Mon Dec 24, 2018 3:28 pm
Forum: Solar Scope Modifications
Topic: PST Etalon with a Quark, Log & Results
Replies: 104
Views: 3381

Re: PST Etalon with a Quark, Log & Results

I'm on 3G speeds with my air card (I live in the boonies), so even if I shaved it down, it would take a long time to upload some where. But I'd be willing to try something if you have any ideas on how to best shave it down without culling good data. HI Marty, Don't really have any suggestion other ...
by Bob Yoesle
Mon Dec 24, 2018 3:22 pm
Forum: Solar Scope Modifications
Topic: Calcium K blocking filter
Replies: 17
Views: 767

Re: Calcium K blocking filter

Hi George, I think the Baader B-CCD is an all dielectric reflection filter on a clear BK7 or similar substrate, not an absorption filter. My CaK system has and continues to evolve. And I have only done this for CaK imaging use. Many years ago I and a few others started with a Baader Blue CCD filter ...