Search found 2605 matches

by pupak
Tue Jul 23, 2024 8:33 pm
Forum: This is SolarChat !!
Topic: Solar newton imaging - Secondary Temperature management
Replies: 2
Views: 50

Re: Solar newton imaging - Secondary Temperature management

A fully plated 300mm mirror is hell. I think the 250/F6 is more reasonable from a seeing point of view, where I would assume better usability under normal conditions. I recently tried the 200/F10 and two 2" UV/IR cut filters and 7 nm H-alpha are really enough to shield the heat. The 200mm teles...
by pupak
Tue Jul 23, 2024 12:35 pm
Forum: This is SolarChat !!
Topic: Ha and Cak 23-07-2024
Replies: 6
Views: 121

Re: Ha and Cak 23-07-2024

Superb session.
Petr
by pupak
Tue Jul 23, 2024 7:39 am
Forum: This is SolarChat !!
Topic: Sol from the 21st of July 2024.
Replies: 5
Views: 138

Re: Sol from the 21st of July 2024.

Superb set of photos.
Petr
by pupak
Tue Jul 23, 2024 7:37 am
Forum: This is SolarChat !!
Topic: H-alpha captures 17th July with Lunt Mod
Replies: 3
Views: 91

Re: H-alpha captures 17th July with Lunt Mod

Superb photos.
Petr
by pupak
Tue Jul 23, 2024 7:36 am
Forum: This is SolarChat !!
Topic: 23 July2024
Replies: 4
Views: 101

Re: 23 July2024

Nice collection of photos.
Petr
by pupak
Mon Jul 22, 2024 5:35 pm
Forum: This is SolarChat !!
Topic: 2 hours 58 minutes timelapse of AR13723, 13727 and 13728 in H-Alpha 26th of June 2024
Replies: 8
Views: 163

Re: 2 hours 58 minutes timelapse of AR13723, 13727 and 13728 in H-Alpha 26th of June 2024

Beautiful animation, Arne. The image is incredibly calm and detailed.
Petr
by pupak
Mon Jul 22, 2024 10:41 am
Forum: This is SolarChat !!
Topic: 22 July 2024
Replies: 3
Views: 104

Re: 22 July 2024

Very nice detailed pictures.
Petr
by pupak
Mon Jul 22, 2024 3:54 am
Forum: This is SolarChat !!
Topic: July 20th Session
Replies: 9
Views: 223

Re: July 20th Session

Superb session.
Petr
by pupak
Sun Jul 21, 2024 7:26 pm
Forum: This is SolarChat !!
Topic: Chief 200/F10 on F40 20.07.
Replies: 10
Views: 310

Re: Chief 200/F10 on F40 20.07.

That's not development, that's just a painstaking reproduction of what smarter people before me have come up with.
by pupak
Sun Jul 21, 2024 7:21 pm
Forum: This is SolarChat !!
Topic: Two Hi-res mosaics in H-a 21.07.
Replies: 16
Views: 425

Re: Two Hi-res mosaics in H-a 21.07.

Thank you all for your positive comments. There was really good seeing around 10 o'clock today, so I got the most out of the telescope. The IMX429 camera with a 0.7x reducer handles F48 incredibly well.
by pupak
Sun Jul 21, 2024 2:49 pm
Forum: This is SolarChat !!
Topic: July 19th Session
Replies: 10
Views: 257

Re: July 19th Session

Nice session.
Petr
by pupak
Sun Jul 21, 2024 11:22 am
Forum: This is SolarChat !!
Topic: Two Hi-res mosaics in H-a 21.07.
Replies: 16
Views: 425

Two Hi-res mosaics in H-a 21.07.

Today was excellent seeing, so I tried the details with AR150/F48 and IMX429. I tried to make two mosaics, so it wants to open in a new window for detail. Hope you like them.
by pupak
Sat Jul 20, 2024 7:45 pm
Forum: This is SolarChat !!
Topic: Chief 200/F10 on F40 20.07.
Replies: 10
Views: 310

Re: Chief 200/F10 on F40 20.07.

KMH wrote: Sat Jul 20, 2024 6:52 pm Beautiful images - I especially like the filaprom. The AR210 does do a great job with the last two images.

Kevin
First picture is from AR210 and second is from Chief.
Petr
by pupak
Sat Jul 20, 2024 4:12 pm
Forum: This is SolarChat !!
Topic: 3 day WL Composite 7/16 7/18 7/19/2024
Replies: 5
Views: 236

Re: 3 day WL Composite 7/16 7/18 7/19/2024

That's a clear sun rash. :D
by pupak
Sat Jul 20, 2024 4:09 pm
Forum: This is SolarChat !!
Topic: Chief 200/F10 on F40 20.07.
Replies: 10
Views: 310

Re: Chief 200/F10 on F40 20.07.

Wow! these last images are just superb :bow :hamster: Alexandra Thank you, Alexandra. Those last two pictures have convinced me that there is no point in building the Chief, as I would just be getting another telescope that has the same features as the ones I already have, so it would be a waste of...
by pupak
Sat Jul 20, 2024 1:13 pm
Forum: This is SolarChat !!
Topic: 2024 07 19 - M Class Flare at 18:05 UTC
Replies: 7
Views: 300

Re: 2024 07 19 - M Class Flare at 18:05 UTC

Superb detail.
Petr
by pupak
Sat Jul 20, 2024 11:37 am
Forum: This is SolarChat !!
Topic: Chief 200/F10 on F40 20.07.
Replies: 10
Views: 310

Re: Chief 200/F10 on F40 20.07.

I also processed an image from the IMX432 camera (0.44"/pixel), but I don't see a significant difference except for a larger FOV.
Appendix : So I couldn't resist and tried to shoot the milk AR210/F8.5 at F38 with IMX432. The FOV is practically the same and so is the resolution.
by pupak
Sat Jul 20, 2024 11:07 am
Forum: This is SolarChat !!
Topic: Chief 200/F10 on F40 20.07.
Replies: 10
Views: 310

Re: Chief 200/F10 on F40 20.07.

Thank you, Franco.
Petr
by pupak
Sat Jul 20, 2024 10:08 am
Forum: This is SolarChat !!
Topic: Chief 200/F10 on F40 20.07.
Replies: 10
Views: 310

Chief 200/F10 on F40 20.07.

Although the milk was terrible, I tried the Chief again at F40 (0.15" / pixel ), which meant that the IMX429 was grossly oversampled (3x). However, despite the loss of contrast due to haze, the results are not the worst, and the 200mm mirror without obstruction shows its power.I feel it beats t...
by pupak
Fri Jul 19, 2024 6:52 pm
Forum: This is SolarChat !!
Topic: Sun FD in H-Alpha, CaK and Continuum July 18th 2024
Replies: 8
Views: 309

Re: Sun FD in H-Alpha, CaK and Continuum July 18th 2024

Superb FD photos, Arne. I love CaK.
Petr
by pupak
Fri Jul 19, 2024 5:41 pm
Forum: This is SolarChat !!
Topic: Sol Ha 18-7-24
Replies: 4
Views: 247

Re: Sol Ha 18-7-24

Nice FD photos.
Petr
by pupak
Fri Jul 19, 2024 5:40 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20240719) | Good seeing + Sol'Ex
Replies: 5
Views: 215

Re: Today's SUN (20240719) | Good seeing + Sol'Ex

Superb session.
Petr
by pupak
Fri Jul 19, 2024 5:40 pm
Forum: This is SolarChat !!
Topic: 19 July 24 PST DoubleStack + Quark VIDEO
Replies: 4
Views: 199

Re: 19 July 24 PST DoubleStack + Quark VIDEO

Very nice and tastefully done video.
Petr
by pupak
Fri Jul 19, 2024 2:34 pm
Forum: This is SolarChat !!
Topic: halpha sun on 19 July
Replies: 2
Views: 193

Re: halpha sun on 19 July

Nice FD photos.
Petr
by pupak
Fri Jul 19, 2024 2:33 pm
Forum: This is SolarChat !!
Topic: First test of off-axis Newton 200/F10- Chief 19.07.
Replies: 10
Views: 375

Re: First test of off-axis Newton 200/F10- Chief 19.07.

I don't have a blog. I used to have a site for CNC machines, but it was beyond me to maintain. 75 CNC machines is already quite a collection. My solar telescopes are not rare enough to be worth promoting somewhere.
by pupak
Fri Jul 19, 2024 1:37 pm
Forum: This is SolarChat !!
Topic: July 17th Session
Replies: 11
Views: 430

Re: July 17th Session

Superb FD pictures and perfect setting.
Petr
by pupak
Fri Jul 19, 2024 1:33 pm
Forum: This is SolarChat !!
Topic: First test of off-axis Newton 200/F10- Chief 19.07.
Replies: 10
Views: 375

Re: First test of off-axis Newton 200/F10- Chief 19.07.

Your images are always fabulous whether they be bad seeing or not, or any telescope you use. You have the magic touch and magic seeing :bow :hamster: :bow Alexandra That's a very nice compliment, Alexandra, but if you'd seen the monstrosity I spawned this morning, it certainly wasn't magic. :D I di...
by pupak
Fri Jul 19, 2024 11:42 am
Forum: This is SolarChat !!
Topic: First test of off-axis Newton 200/F10- Chief 19.07.
Replies: 10
Views: 375

First test of off-axis Newton 200/F10- Chief 19.07.

Literally on the board, I tested this construction with a tilted primary mirror of 4.2° and two correction lenses f = +- 250mm. Instead of DERF, I used two 2" Baader UV/IR cut and H-a 12 nm filters, which were screwed on top of each other and placed in front of the correction 2" lens. The ...
by pupak
Wed Jul 17, 2024 4:04 pm
Forum: This is SolarChat !!
Topic: Sol from the 14th of July 2024.
Replies: 10
Views: 340

Re: Sol from the 14th of July 2024.

Superb session.
Petr
by pupak
Tue Jul 16, 2024 4:51 pm
Forum: This is SolarChat !!
Topic: July 14th - the good, the bad and the ugly
Replies: 10
Views: 305

Re: July 14th - the good, the bad and the ugly

Superb photos.
Petr
by pupak
Tue Jul 16, 2024 2:38 pm
Forum: This is SolarChat !!
Topic: 15th July 2024 solar FDs across the spectrum and closer views in Ha
Replies: 22
Views: 563

Re: 15th July 2024 solar FDs across the spectrum and closer views in Ha

Very nice collection of sun photos, Stu. The details are beautifully drawn.
Petr
by pupak
Tue Jul 16, 2024 10:45 am
Forum: This is SolarChat !!
Topic: Sunday Sunshine 14th July
Replies: 11
Views: 523

Re: Sunday Sunshine 14th July

Superb photos, Mark,
Petr
by pupak
Mon Jul 15, 2024 3:42 pm
Forum: This is SolarChat !!
Topic: Test of the new lens Lichtenknecker 150/F8 HA - 15.07.
Replies: 8
Views: 297

Re: Test of the new lens Lichtenknecker 150/F8 HA - 15.07.

It didn't work for me and I took a few pictures with the AR200/F8.5 at F34 with a 0.8x reduction in front of the IMX429 camera. I'm not saying that there is no difference, but 150 vs 200 mm, I would expect more.The truth is that the seeing was now much worse in the afternoon than at noon.
by pupak
Mon Jul 15, 2024 1:00 pm
Forum: This is SolarChat !!
Topic: Test of the new lens Lichtenknecker 150/F8 HA - 15.07.
Replies: 8
Views: 297

Re: Test of the new lens Lichtenknecker 150/F8 HA - 15.07.

Looks good Petr, a lot of strehl i guess. Does it behave better with the seeing relative to the other scopes? I haven't compared it, but it's very good for midday sun. According to the original report, Strehl has an H-a of 0.956, but what has changed after 35 years is hard to predict. Definitely th...
by pupak
Mon Jul 15, 2024 11:44 am
Forum: This is SolarChat !!
Topic: Test of the new lens Lichtenknecker 150/F8 HA - 15.07.
Replies: 8
Views: 297

Test of the new lens Lichtenknecker 150/F8 HA - 15.07.

I waited a long time for this lens because it needed new anti-reflective coatings. They finally brought it today, so I had to try it on, but unfortunately already in the midday sun. Even so, the results exceeded all my expectations. Tests on F32 and F48 with IMX533 and IMX429 showed the qualities of...
by pupak
Mon Jul 15, 2024 5:48 am
Forum: This is SolarChat !!
Topic: FD 14 Juli
Replies: 8
Views: 467

Re: FD 14 Juli

Superb FD photos.
Petr
by pupak
Mon Jul 15, 2024 5:47 am
Forum: This is SolarChat !!
Topic: 010724 AR13727 Ha HR iStar204 vs C11, (Addition C11 AR3727)
Replies: 18
Views: 1044

Re: 010724 AR13727 Ha HR iStar204 vs C11, (Addition C11 AR3727)

Both telescopes produce great images.
Petr
by pupak
Mon Jul 15, 2024 5:44 am
Forum: This is SolarChat !!
Topic: Calcium Sun July 14, 2024
Replies: 23
Views: 848

Re: Calcium Sun July 14, 2024

Superb set of CaK photos.
Petr
by pupak
Mon Jul 15, 2024 5:40 am
Forum: Solar Astronomy Shop and Swap
Topic: Sale of solar telescopes.
Replies: 4
Views: 1642

Re: Sale of solar telescopes.

I apologize to everyone who responded to this ad. My emails end up in spam, so use PM instead.
Today I am also adding the AR210/F8.5 to the sales offer.
by pupak
Sun Jul 14, 2024 9:02 pm
Forum: This is SolarChat !!
Topic: Full Disc 14-07-2024
Replies: 5
Views: 289

Re: Full Disc 14-07-2024

Superb FDs.
Petr
by pupak
Sun Jul 14, 2024 9:01 pm
Forum: This is SolarChat !!
Topic: halpha sun on 14 July
Replies: 6
Views: 328

Re: halpha sun on 14 July

Nice FD detailed pictures.
Petr
by pupak
Sun Jul 14, 2024 9:00 pm
Forum: This is SolarChat !!
Topic: Among the clouds with AR210/F8.5 14.07.
Replies: 8
Views: 512

Re: Among the clouds with AR210/F8.5 14.07.

Hi, Before guessing. Is the 450m height difference noticeable? Who is higher? :bow2 OK, looked again at the images and s2 is sharper... ¿?¿?¿? My telescope is at an altitude of 450m, the other at 900m. I was wondering if the difference would be noticeable in the photos, but I can't see it. It's pro...
by pupak
Sun Jul 14, 2024 1:39 pm
Forum: This is SolarChat !!
Topic: July 13th - more experimenting
Replies: 18
Views: 702

Re: July 13th - more experimenting

Excellent session, Brian.
Superb detailed photos.
Petr
by pupak
Sun Jul 14, 2024 1:36 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20240714) | Good seeing
Replies: 10
Views: 370

Re: Today's SUN (20240714) | Good seeing

Superb photo collection again, Pedro.
Petr
by pupak
Sun Jul 14, 2024 1:34 pm
Forum: This is SolarChat !!
Topic: 14.7.24, some images from todays session
Replies: 24
Views: 716

Re: 14.7.24, some images from todays session

A wonderful collection of detailed photos. That calcium looks even wilder than H-a.
Petr
by pupak
Sun Jul 14, 2024 11:11 am
Forum: This is SolarChat !!
Topic: Among the clouds with AR210/F8.5 14.07.
Replies: 8
Views: 512

Among the clouds with AR210/F8.5 14.07.

I missed that brief moment of cloudless skies, so I hunted again.
Among the photos is one from a colleague with the new AR210. Can you find her? I did the processing myself so it wasn't too different. Is the 450m height difference noticeable?