Search found 2390 matches

by robert
Fri Oct 12, 2018 11:28 am
Forum: This is SolarChat !!
Topic: Help Diagnose an SCT?
Replies: 24
Views: 374

Re: Help Diagnose an SCT?

I tried a secondhand Celestron 9.25 with ND3.8 UV/IR and Baader continuum with TVx5 or Barlow x3. It lacked contrast and was very difficult to focus. Stacking software failed to latch onto the granulation cells. After reading about Solar Newtonians on the forum I got hold of a very cheap 200mm f1000...
by robert
Wed Oct 10, 2018 1:11 pm
Forum: This is SolarChat !!
Topic: Decent sized proms on Oct 9
Replies: 11
Views: 168

Re: Decent sized proms on Oct 9

Stunningly good
Robert
by robert
Wed Oct 10, 2018 1:11 pm
Forum: SPoD Archive
Topic: Decent sized proms on Oct 9
Replies: 11
Views: 118

Re: Decent sized proms on Oct 9

Stunningly good
Robert
by robert
Wed Oct 10, 2018 1:10 pm
Forum: This is SolarChat !!
Topic: The hydrogen cork, and the solar ghost by Apollo Lasky
Replies: 11
Views: 237

Re: The hydrogen cork, and the solar ghost by Apollo Lasky

Lovely sequence, it shows how interesting off-band images can be, especially animated. I have noticed that but not acted on it very often.
Robert
by robert
Wed Oct 10, 2018 12:16 pm
Forum: This is SolarChat !!
Topic: Whirling Prom Animation 20181007
Replies: 11
Views: 206

Re: Whirling Prom Animation 20181007

Lovely animation and great additions. I would add that ImPPG is very good for aligning frames too, anyhow all very interesting
Robert

menu item
imppg menu.jpg
imppg menu.jpg (56.99 KiB) Viewed 138 times
screen to use for aligning
imppg align.jpg
imppg align.jpg (174.97 KiB) Viewed 138 times
by robert
Mon Oct 01, 2018 12:38 pm
Forum: This is SolarChat !!
Topic: Impact of telescope height on the seeing
Replies: 17
Views: 460

Re: Impact of telescope height on the seeing

Excellent clear results and presentation, thanks
Robert
by robert
Wed Sep 26, 2018 5:14 pm
Forum: This is SolarChat !!
Topic: Prominence Hedgerow Animation
Replies: 12
Views: 370

Re: Prominence Hedgerow Animation

Beautifully done
by robert
Wed Sep 26, 2018 5:07 pm
Forum: This is SolarChat !!
Topic: Late September Sunrise
Replies: 10
Views: 194

Re: Late September Sunrise

Lovely
by robert
Wed Sep 26, 2018 5:03 pm
Forum: This is SolarChat !!
Topic: Exploding arch prom from 9/19
Replies: 17
Views: 410

Re: Exploding arch prom from 9/19

Wonderful capture
by robert
Wed Sep 26, 2018 5:02 pm
Forum: This is SolarChat !!
Topic: Great Proms Today! 120mm HA, Sept 25th 2018
Replies: 7
Views: 175

Re: Great Proms Today! 120mm HA, Sept 25th 2018

Superb detail in the proms
Robert
by robert
Sun Sep 09, 2018 3:51 pm
Forum: This is SolarChat !!
Topic: 8th September, sunpot on a spotless day
Replies: 10
Views: 620

Re: 8th September, sunpot on a spotless day

Thanks Eric, Stu, Franco and Alexandra
by robert
Sat Sep 08, 2018 4:46 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20180908) new AR
Replies: 3
Views: 175

Re: Today's SUN (20180908) new AR

Lovely to see the proms
Robert
by robert
Sat Sep 08, 2018 4:45 pm
Forum: This is SolarChat !!
Topic: 8th September, sunpot on a spotless day
Replies: 10
Views: 620

Re: 8th September, sunpot on a spotless day

PDB wrote:
Sat Sep 08, 2018 4:00 pm
Good catch Robert. The group has now numer AR12721

Cloudy here ...

Paul
Thanks Paul
by robert
Sat Sep 08, 2018 4:45 pm
Forum: This is SolarChat !!
Topic: White light solar observations,questions..
Replies: 3
Views: 133

Re: White light solar observations,questions..

With narrowish band filter eg Baader Continuum an achromat is probably ok but best optical quality that is affordable is a good plan for detailed imaging in WL. Without the narrow band filter APO will be better. Probably the wedge size is dependent on the camera chip size. Smaller CCD chip allows a ...
by robert
Sat Sep 08, 2018 2:09 pm
Forum: This is SolarChat !!
Topic: Sun in K and CaH Sept. 5th & 6th
Replies: 14
Views: 365

Re: Sun in K and CaH Sept. 5th & 6th

Great results and I think your seeing must be good to get granulation like that with 130mm aperture. No boring at all!
Robert
by robert
Sat Sep 08, 2018 2:03 pm
Forum: This is SolarChat !!
Topic: 8th September, sunpot on a spotless day
Replies: 10
Views: 620

Re: 8th September, sunpot on a spotless day

Thanks Mark. It was lovely and warm but now cool and cloudy!
by robert
Sat Sep 08, 2018 1:56 pm
Forum: This is SolarChat !!
Topic: 8th September, sunpot on a spotless day
Replies: 10
Views: 620

8th September, sunpot on a spotless day

I was expecting a spotless sun but as the seeing was ok and I tried the Newtonian 200mm for granulation in white light. I was amazed to see a group of small spots. I did a CaK FD to locate them and a cropped view in CaK to compare. Robert SW200 ND3.8 Astrosolar, Continuum, UV/IR, TV x5 https://farm2...
by robert
Sat Sep 01, 2018 10:15 am
Forum: This is SolarChat !!
Topic: Granulation shots (TEC140 F/7, X4 & X5 Powermates)
Replies: 16
Views: 457

Re: Granulation shots (TEC140 F/7, X4 & X5 Powermates)

Great results, a pleasing subject!
Robert
by robert
Mon Aug 27, 2018 4:41 pm
Forum: This is SolarChat !!
Topic: 27th CaK AR2719 AR2720 going to the limb
Replies: 1
Views: 84

27th CaK AR2719 AR2720 going to the limb

ED100 with x2 Barlow, Lunt CaK B600. The two active regions approaching the limb today
Robert

Image0827 27_Aug_18_123830_lapl4_ap545 by robertarnold, on Flickr
by robert
Sat Aug 25, 2018 8:08 am
Forum: This is SolarChat !!
Topic: Today's SUN (20180824) with TWO ARs
Replies: 7
Views: 233

Re: Today's SUN (20180824) with TWO ARs

Great results
Robert
by robert
Sat Aug 25, 2018 8:07 am
Forum: This is SolarChat !!
Topic: 24th WL close up
Replies: 4
Views: 149

Re: 24th WL close up

krakatoa1883 wrote:
Fri Aug 24, 2018 5:34 pm
Very detailed image, well resolved. Have you used an IR cut in addition to the Continuum ?
Yes I did Raf. Forgot to list it! Also PGR Ch 3 3.2Mpx
Robert
by robert
Fri Aug 24, 2018 5:04 pm
Forum: This is SolarChat !!
Topic: 24th WL close up
Replies: 4
Views: 149

24th WL close up

AR 2719 today. Seeing was ok 1.5-2.0+ arc sec and sheltered from the wind. 200mm Newton, Televue x5 Baader ND3.8 Astrosolar and Continuum,
Robert

Image0824 24_Aug_18_125522_lapl4_ap805 by robertarnold, on Flickr
by robert
Fri Aug 24, 2018 4:55 pm
Forum: This is SolarChat !!
Topic: Two "animations": white light - CaK and CaK - H-alpha
Replies: 6
Views: 191

Re: Two "animations": white light - CaK and CaK - H-alpha

Lovely and fascinating animations
Robert