Search found 145 matches

by Rusted
Thu Feb 27, 2020 4:25 pm
Forum: Solar Scope Modifications
Topic: Using a laser power meter with thermopile sensor to check ERF filters
Replies: 48
Views: 2396

Re: Using a laser power meter with thermopile sensor to check ERF filters

Hi I purchased a cheap laser pointer thermometer off eBay for checking temperatures in a PST mod. Does anyone know how sensitive it is to the colour of the surface its pointed at, Black2 painted to bare aluminium? Will it work through a lens or filter? I assume a smaller proportion of the glass and...
by Rusted
Wed Feb 26, 2020 1:50 pm
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Re: Avoiding poor, local seeing conditions.

Interesting thread! Thanks Mark. I was just admiring your blog. :bow Many of the members here have ten years [or more] of extra solar observing and imaging experience compared to my own. "Borrowing" their expertise is a great time [and money] saver. No point in "reinventing the wheel" just for the ...
by Rusted
Tue Feb 25, 2020 6:45 pm
Forum: Solar Scope Modifications
Topic: 150mm/Lunt35/Coronado BF15 mod
Replies: 48
Views: 6034

Re: 150mm/Lunt35/Coronado BF15 mod

Very impressive results Stu.

I wonder if separating binocular objectives would provide suitable plano concave lenses at much lower cost?
Inexpensive, Porro Binoculars are readily available secondhand. Though I have no idea as to the likely, negative, focal length.
by Rusted
Tue Feb 25, 2020 11:54 am
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Re: Avoiding poor, local seeing conditions.

Montana wrote:
Tue Feb 25, 2020 10:13 am
I totally agree with the SWAMBO (after I looked it up) but a black bathroom? how depressing and wouldn't it show up the soap dirt permanently ;)

Alexandra
Hi Alexandra,

There is no accounting for poor taste or fashion. ;)
by Rusted
Tue Feb 25, 2020 9:13 am
Forum: Solar Scope Modifications
Topic: Easy PST Module with ERF (non-destructive, no cutting of OTA, & no-black-box rebuild)
Replies: 85
Views: 3625

Re: Easy PST Module with ERF (non-destructive, no cutting of OTA, & no-black-box rebuild)

The camera problems I have experienced may well be due to the extensive duration of my imaging sessions. Back in the summer I would often be out in the observatory by 9am. Then track the sun all day long until it finally disappeared behind the trees at 4pm or even later. Always using my 6" f/8 inte...
by Rusted
Tue Feb 25, 2020 8:52 am
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Re: Avoiding poor, local seeing conditions.

My wife hated it in white primer! :? Hi Rusted, Well that is a heavy reason and as they say SWAMBO No discussion anymore :lol: Is it not allowed to have white roofs in Denmark ? Life is too short to go a up against overwhelming power! :mrgreen: Black roofs are impractical but compulsory in Denmark....
by Rusted
Tue Feb 25, 2020 8:43 am
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Re: Avoiding poor, local seeing conditions.

Hi Rusted, White was nice ;-) if white is a no go, try a very large survival blanket covering the dome. You can remove it when you are not arround. Or just water the dome. Regarding thermal regulated etalons, I've never seen an issue associated to it. It was a bit of a concern at the begining since...
by Rusted
Mon Feb 24, 2020 6:07 pm
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Re: Avoiding poor, local seeing conditions.

Two reasons Hi Rusted, Why not paint it white ? Rainer Hi Rainer, Two reasons: High visibility would make it far more obvious from the nearby road at 200 meters. :o Presently it is almost invisible against the background trees and fields. My wife hated it in white primer! :? Choose only one! :mrgree...
by Rusted
Mon Feb 24, 2020 9:56 am
Forum: Solar Scope Modifications
Topic: Easy PST Module with ERF (non-destructive, no cutting of OTA, & no-black-box rebuild)
Replies: 85
Views: 3625

Re: Easy PST Module with ERF (non-destructive, no cutting of OTA, & no-black-box rebuild)

I have built a new 6" H-alpha telescope after permanently damaging my ZWO ASI120MC. Despite the internal 90mm D-ERF I was able to burn my hand in the focused beam at the empty focuser. The heat must have damaged my camera even after passing through the etalon, ITF and BF. During video capture my 120...
by Rusted
Mon Feb 24, 2020 9:31 am
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Re: Avoiding poor, local seeing conditions.

Hi Andrew, I don't think it is possible to divorce the thermal issues arising [sic] from additional surfaces to shield the building itself. They will absorb the sun's heat and produce convection currents much like the observatory building itself. My green painted dome shows inside temperatures on hi...
by Rusted
Sun Feb 23, 2020 8:52 am
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Re: Avoiding poor, local seeing conditions.

Thank you Christian. You have shared some fascinating insights into potential thermal problems. If the etalon group and camera are so warm, then does it necessarily man there is convection into the light path? If we follow the practice of protecting the etalon with CCD and KG3 filters then they will...
by Rusted
Fri Feb 21, 2020 7:03 pm
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Re: Avoiding poor, local seeing conditions.

I didn't realize how big a difference the ground height can make. Thanks for that link. My tripod is somewhat tall, so the objective of the telescope is probably at 2 meters. I wish I had an observatory, but the up side is that I am set up on grass with no real buildings or roads to the south. I am...
by Rusted
Tue Feb 18, 2020 1:09 pm
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Re: Avoiding poor, local seeing conditions.

This is an interesting thread by Christian https://solarchatforum.com/viewtopic.php?f=4&t=25158&p=226404#p226404 Alexandra Many thanks for the interesting link. I may have the advantage of a 5m+ observing height [over local ground level] but have house roofs to my SE and south. Which is ironic cons...
by Rusted
Mon Feb 17, 2020 7:01 pm
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Re: Avoiding poor, local seeing conditions.

Thanks Marty! It's good to know somebody else is taking local and instrumental seeing conditions seriously and actually making a useful difference. Thanks for sharing your valuable experiences. Having viewed your "raising steam" video I wondered whether the rising mist wasn't just acting as a highly...
by Rusted
Mon Feb 17, 2020 4:01 pm
Forum: This is SolarChat !!
Topic: Avoiding poor, local seeing conditions.
Replies: 22
Views: 423

Avoiding poor, local seeing conditions.

Marty mentioned poor daytime seeing conditions when using larger apertures of solar telescope. 150mm+/6"+. I have used only a 150mm/ 6" for my PST mods. I find the seeing is changeable. I wonder whether most, "poor daytime seeing" problems are simply from being being far too close to the ground? The...
by Rusted
Wed Feb 05, 2020 12:03 pm
Forum: This is SolarChat !!
Topic: 29.01.2020 AR2757 Daubs.
Replies: 17
Views: 415

Re: 29.01.2020 AR2757 Daubs.

Thank you both for your encouragement. :)
by Rusted
Sun Feb 02, 2020 6:54 pm
Forum: This is SolarChat !!
Topic: 29.01.2020 AR2757 Daubs.
Replies: 17
Views: 415

Re: 29.01.2020 AR2757 Daubs.

Thanks again for your kind comments. I liked the original best as it looked the most natural. I do my image colouring in PhotoFiltre7 . No rules or settings. I just add the basic colour using the slider in Hue Variation . The colour always comes out very weak. So then I play with [colour] Saturation...
by Rusted
Sat Feb 01, 2020 1:32 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: "New" PST comes with a 30mm etalon??
Replies: 12
Views: 416

Re: "New" PST comes with a 30mm etalon??

Beat the rush! Get yours now! ;)
by Rusted
Sat Feb 01, 2020 1:30 pm
Forum: This is SolarChat !!
Topic: Daniel K. Inouye Solar Telescope
Replies: 12
Views: 393

Re: Daniel K. Inouye Solar Telescope

That instrument is great and all, but it wouldn't do what it needs to do without being 10k up in the air in Hawaii with top seeing! I'd rather have the geographic location than the scope! :P Very best, Just think of the money they could have saved if they had sent you up there with a 14-16" "oven r...
by Rusted
Sat Feb 01, 2020 1:22 pm
Forum: This is SolarChat !!
Topic: 29.01.2020 AR2757 Daubs.
Replies: 17
Views: 415

Re: 29.01.2020 AR2757 Daubs.

Thanks for your continuing encouragement. I was quite pleased with the detail but unsure how far to push it in processing. It is so easy to make everything look artificial. Which is why I posted various degrees of processing. Considering the Sun was only about 12-14° high, locally, the seeing must h...
by Rusted
Fri Jan 31, 2020 8:14 am
Forum: This is SolarChat !!
Topic: Solar imaging - computer write speed/FPS values?
Replies: 8
Views: 357

Re: Solar imaging - computer write speed/FPS values?

Thanks Rusted, that’s an interesting idea to use a large 25 inch LCD screen instead of the tiny laptop screen! Magnus Hi Magnus, 25" may be on the large side. A 23" or 24" would easily have done for me. It depends on your comfortable viewing distance from the screen in imaging practice and whether ...
by Rusted
Thu Jan 30, 2020 7:00 pm
Forum: This is SolarChat !!
Topic: Daniel K. Inouye Solar Telescope
Replies: 12
Views: 393

Re: Daniel K. Inouye Solar Telescope

Hi, Stunning resolution. Rainer https://www.nso.edu/telescopes/dki-solar-telescope The difference between their equipment and ours is They buy it with what we paid Taxes and we pay our equipment what is left after paying Taxes :lol: :lol: :lol: Judging from the price of their "toys," I thought all ...
by Rusted
Thu Jan 30, 2020 6:54 pm
Forum: This is SolarChat !!
Topic: 29.01.2020 AR2757 Daubs.
Replies: 17
Views: 415

Re: 29.01.2020 AR2757 Daubs.

Thank you all for your kind words.

The learning curve on image processing is overhanging rock with too few handholds.

I may have to wait for AI. :D
by Rusted
Thu Jan 30, 2020 1:19 pm
Forum: This is SolarChat !!
Topic: 29.01.2020 AR2757 Daubs.
Replies: 17
Views: 415

Re: 29.01.2020 AR2757 Daubs.

Thank you Alexandra. :D

It was mostly down to the better seeing but I feel I am making some progress on the processing.

Here's a third, even more aggressive shot at processing:
Shame about the brightness gradient across the image.

29012020 spot 2k imppg pf blog copy pf 3.jpg
29012020 spot 2k imppg pf blog copy pf 3.jpg (97.81 KiB) Viewed 405 times
by Rusted
Thu Jan 30, 2020 11:53 am
Forum: This is SolarChat !!
Topic: 29.01.2020 AR2757 Daubs.
Replies: 17
Views: 415

29.01.2020 AR2757 Daubs.

Hi, Unexpectedly, steady seeing, during short, sunny periods showed radiating lines from the immediate area of the AR and environs. 29012020 spot imppg pf blog.jpg 29012020 spot 2k imppg pf blog copy pf.jpg 6" f/8, internal D-ERF, Baader 2" H-a 35nm CCD, 1.125 GPC, PST mods, Maier ITF, ASI174. 640x4...