Search found 55 matches

by DavidP
Sat Feb 27, 2021 12:00 am
Forum: SPoD Archive
Topic: Feb 26 2021 - Daystar Gemini & Esprit 150
Replies: 10
Views: 25

Re: Feb 26 2021 - Daystar Gemini & Esprit 150

Outstanding images.
by DavidP
Sat Feb 27, 2021 12:00 am
Forum: This is SolarChat !!
Topic: Feb 26 2021 - Daystar Gemini & Esprit 150
Replies: 10
Views: 98

Re: Feb 26 2021 - Daystar Gemini & Esprit 150

Outstanding images.
by DavidP
Fri Feb 19, 2021 1:56 am
Forum: This is SolarChat !!
Topic: Realworld difference between C8 and C11 h-alpha levels of detail with excellent seeing?
Replies: 11
Views: 289

Re: Realworld difference between C8 and C11 h-alpha levels of detail with excellent seeing?

Hey It sounds like a Airylab Solar Scintillation Monitor would be a good investment for you to get some real data on seeing at your site. Setting the sensor next to your aperture will tell you exactly what you have. If it were me, I would use one for as many sessions as possible with your present se...
by DavidP
Wed Feb 17, 2021 3:39 pm
Forum: This is SolarChat !!
Topic: Zoom Meeting - 21 February @ 18:00 UT
Replies: 74
Views: 1399

Re: Zoom Meeting - 21 February @ 18:00 UT

Another suggestion for brief discussion. I’m wondering if there might be enough interest in putting together an afternoon or two workshop that would cover image processing. I know I would pay to take part in a class put on by a couple of our accomplished imagers. I think , if we put it out in the Cl...
by DavidP
Wed Feb 17, 2021 5:28 am
Forum: This is SolarChat !!
Topic: CaK Full Disk 16th February
Replies: 24
Views: 251

Re: CaK Full Disk 16th February

Wow Mark. Very nice
by DavidP
Sun Feb 14, 2021 11:44 pm
Forum: This is SolarChat !!
Topic: Zoom Meeting - 21 February @ 18:00 UT
Replies: 74
Views: 1399

Re: Zoom Meeting - 21 February @ 18:00 UT

Bob Yoesle wrote:
Sun Feb 14, 2021 5:01 pm
Suggested topic: Checking etalon quality by using a Hydrogen spectrum tube.
I second that. 👍🏿
by DavidP
Sun Feb 14, 2021 10:18 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Daystar Quantum tuning question
Replies: 15
Views: 287

Re: Daystar Quantum tuning question

David, I like the idea of a piece of gear travelling literally all over the world in the SC community! (On second thoughts, however, my recent experiences with the German mail services make me wonder how many stops that power supply would make before its trail disappears somewhere..) Frank That is ...
by DavidP
Sun Feb 14, 2021 6:24 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Daystar Quantum tuning question
Replies: 15
Views: 287

Re: Daystar Quantum tuning question

You know what would be cool? A group purchase of a Hydrogen spectrum tube power supply. It seems like a quality unit that can power a tube for longer than 30 second intervals can be had for about $300. It could be passed around to those who go in. Tubes are cheap and easily purchased individually. ?...
by DavidP
Sat Feb 13, 2021 7:07 pm
Forum: This is SolarChat !!
Topic: Zoom Meeting - 21 February @ 18:00 UT
Replies: 74
Views: 1399

Re: Interest in a Zoom Meeting?

I’d like to take part! Thanks for putting this together
by DavidP
Thu Feb 11, 2021 12:20 am
Forum: Forum Support Issues
Topic: Deleting a post
Replies: 6
Views: 135

Re: Deleting a post

Next to the “!” And “ thumbs up”?
5CB8BE7A-3994-470D-9D13-C5D3FE1B6EA1.jpeg
5CB8BE7A-3994-470D-9D13-C5D3FE1B6EA1.jpeg (258.73 KiB) Viewed 125 times
by DavidP
Wed Feb 10, 2021 8:22 pm
Forum: Forum Support Issues
Topic: Deleting a post
Replies: 6
Views: 135

Deleting a post

I’m not seeing how to delete a post that I recently made.
And thank you very much for your work on the site. I have appreciated it so much
by DavidP
Wed Feb 10, 2021 8:20 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Help with Solar Spectrum etalon
Replies: 11
Views: 241

Re: Help with Solar Spectrum etalon

Thanks Lars. That’s good advice. I just need some clear weather. The vignetting with the reducer made things kind of confusing. I’ll try it at f/32 visually. So much to consider when assessing issues. Oven temp, the 4x telecentric, correct spacing, rigid optical train, seeing...Taking the camera and...
by DavidP
Mon Feb 08, 2021 10:46 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Help with Solar Spectrum etalon
Replies: 11
Views: 241

Re: Help with Solar Spectrum etalon

Good advice. Thanks.
I do plan to buy a IMX174 camera. Trying to decide whether the increased cost over of a Basler over an ASI is justified. I figured my 3.45 micron camera would do well at f/16.
I’ll try binning, and post some images
by DavidP
Mon Feb 08, 2021 3:54 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Help with Solar Spectrum etalon
Replies: 11
Views: 241

Re: Help with Solar Spectrum etalon

Ok. So this is normal. Does one just crop the unvignetted part of the image with ROI during capture? I've tried both a IMX183 and a IMX253 which has a 1.1" sensor and 3.45 um pixels. What concerns me is the fact that the image with the reducer does not vignette symmetrically. I don't know if you can...
by DavidP
Sun Feb 07, 2021 10:20 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Help with Solar Spectrum etalon
Replies: 11
Views: 241

Help with Solar Spectrum etalon

So I have a new SS RG 18mm aperture 3A filter. As of now, I have it on a 102mm refractor at f/32 using a Baader 4x telecentric. I believe I have the spacings correct with the telecentric. I have been trying to use a .5x reducer ( just an inexpensive GSO). With this, I'm getting terrible vignetting ....
by DavidP
Sat Feb 06, 2021 4:06 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Gamma not working on camera
Replies: 11
Views: 285

Re: Gamma not working on camera

Just an update for those with Grasshoppers that have had similar issues. Running b2.7beta solved the problem with gamma. Contrary to some other peoples experiences who were using a plug-in, I have not noticed a slowing in FPS with gamma on. Problemo solved!
by DavidP
Thu Feb 04, 2021 5:10 pm
Forum: This is SolarChat !!
Topic: Calcium Grains in a Tropical Winter
Replies: 36
Views: 681

Re: Calcium Grains in a Tropical Winter

Justapicture. Those a beautiful dramatic images. Can you say anything more about your use of gamma?
by DavidP
Wed Feb 03, 2021 4:12 am
Forum: Solar Software
Topic: Photoshop version and alternatives
Replies: 14
Views: 3974

Re: Photoshop version and alternatives

rsfoto wrote:
Sun Apr 19, 2020 5:37 pm
Montana wrote:
Fri Apr 17, 2020 7:08 am
GIMP
Hi Alexandra,

Is there also a downloadable PDF instruction manual or is it just available online ?

I looked at the GIMP page but did not find anything :?:
There are tons of online tutorials for every aspect of GIMP
by DavidP
Mon Feb 01, 2021 2:24 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Gamma not working on camera
Replies: 11
Views: 285

Re: Gamma not working on camera

Thanks Alexandra. I’ll open it under Administrator. Yes. The gamma button is there, and clicks on. Just no affect. It sounds like a FireCap issue. Others have reported similar with the camera. There is a plug-in that fixes it , but draws down capture speed, which makes it a no go. I’m wondering if t...
by DavidP
Sun Jan 31, 2021 10:32 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Gamma not working on camera
Replies: 11
Views: 285

Re: Gamma not working on camera

No. Not in Mode 7 ( which reminds me; Firecapture is a read only program. There is no way to have it remember settings. Right?). Gamma button checked. I tried it in Flycap, but I have never used the program before. It recognized the camera, but I couldn’t tell if it was working or not. I could not b...
by DavidP
Sun Jan 31, 2021 4:26 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Sony IMX253 mono cameras
Replies: 35
Views: 1106

Re: Sony IMX253 mono cameras

How about running this camera with FireCapture? Any issues?
by DavidP
Fri Jan 29, 2021 3:55 am
Forum: This is SolarChat !!
Topic: 28-1-2021 IT DOES SEEM THE SUN IS HAVING A NAP SOON.
Replies: 14
Views: 202

Re: 28-1-2021 IT DOES SEEM THE SUN IS HAVING A NAP SOON.

Nice looking pier Mark. How will it be secured?
by DavidP
Wed Jan 27, 2021 6:20 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Gamma not working on camera
Replies: 11
Views: 285

Gamma not working on camera

So I have a new to me used camera. FLIR Pointgrey grasshopper3 12.3MP GS3-U3-123S6M-C. 3.45um pixels Using FireCap the gamma control does not seem to have any effect. I have the software installed for Point Grey, and otherwise everything seems to work. Using my ZWO Camera in FireCap, gamma works fine.
by DavidP
Mon Jan 25, 2021 2:46 am
Forum: This is SolarChat !!
Topic: Sol from the 22nd of January 2021.
Replies: 7
Views: 69

Re: Sol from the 22nd of January 2021.

Eric. I’m very impressed with your work. Very nice. Both the Solar Max 90 and the Daystar images are remarkable.
I might have asked before, are the prominences on the Calcium images from separate imaging? From Ha?
by DavidP
Sun Jan 24, 2021 5:12 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Readily Available Long Focal Length Refractors
Replies: 33
Views: 700

Re: Readily Available Long Focal Length Refractors

Ishtar makes a 6” f/10 objective optimized for Ha that runs about $1200. They also make a regular 6” f/10 for less. Their lens cells look nice. One down side of some of the cheaper telescopes are lens cells that can not be collimated. I would imagine this would be important for a long focus refracto...