Search found 2410 matches

by gabrieli
Tue Jun 04, 2013 7:35 pm
Forum: This is SolarChat !!
Topic: Another day, another question
Replies: 5
Views: 346

Re: Another day, another question

Thanks Michel, Walter, and Brian. The dark lines haven't really had any effect on the final product. So far, they process out with very little effort and are just a visual annoyance. The lines have enough transparency that a local levels adjustment should be enough to fix the problem if using the en...
by gabrieli
Tue Jun 04, 2013 1:41 pm
Forum: This is SolarChat !!
Topic: Sun Ha HR mosaic full disc - 2 June 2013 - 0855UT
Replies: 13
Views: 961

Re: Sun Ha HR mosaic full disc - 2 June 2013 - 0855UT

Roberto

Your image is breathtaking. It is a stunning example in favor of double stacking.
by gabrieli
Tue Jun 04, 2013 11:16 am
Forum: This is SolarChat !!
Topic: Another day, another question
Replies: 5
Views: 346

Another day, another question

I guess you can tell that I'm in the middle of a lot of processing since I'm asking questions instead of posting images. I've noticed, in both my Grasshopper3 and my Chameleon, a minor effect in my Live view and recorded image, independent of magnification or camera orientation. It's the presence of...
by gabrieli
Tue Jun 04, 2013 10:44 am
Forum: This is SolarChat !!
Topic: Does anyone know how this happens?
Replies: 9
Views: 371

Re: Does anyone know how this happens?

Thanks to everyone for all the suggestions. The reason I don't think it's a focussing issue is that I focus using a contrasty surface view and then I adjust the camera parameters to bring out the proms. I certainly would notice an image out of focus to the degree shown in the posted sample. I'll try...
by gabrieli
Tue Jun 04, 2013 3:28 am
Forum: This is SolarChat !!
Topic: Does anyone know how this happens?
Replies: 9
Views: 371

Does anyone know how this happens?

I notice that, sometimes, when using a 3X Barlow with my LS152 to image proms, the proms show a weird outline effect. This also happens with the spicule layer. I don't think it's a focussing problem or a seeing problem. When I switch from surface imaging to prom imaging, I increase the exposure time...
by gabrieli
Mon Jun 03, 2013 1:46 am
Forum: This is SolarChat !!
Topic: Broken filament+ proms from May 31
Replies: 8
Views: 368

Re: Broken filament+ proms from May 31

Thanks, everyone. This filament was one of the more interesting ones in a while.

Hi Derek

I see what you see, now. It's kind of like a trail between the two parts of the filament. I was so busy bringing out the tonal
gradations in the filament that I didn't spot that. Great stuff.
by gabrieli
Mon Jun 03, 2013 12:24 am
Forum: This is SolarChat !!
Topic: Some Sun From Between The Clouds - 2nd June
Replies: 5
Views: 137

Re: Some Sun From Between The Clouds - 2nd June

Hi Mark

I just wandered over to your website and saw

CaK Post Flare Prom Lift Off Animation - 31st May.

That's the prettiest lift off I've ver seen. What patience!

Do you have a "sense" that a lift off is about to occur?
by gabrieli
Sun Jun 02, 2013 10:36 pm
Forum: This is SolarChat !!
Topic: Full disc and proms on June 2
Replies: 4
Views: 126

Full disc and proms on June 2

Uneven exposure due to hazy sky and clouds required more time than usual in PS. I still have to play with feathering to avoid distinct borders during selection(noticeable along the periphery in places). Higher res at: http://giovannigabrieli.deviantart.com/art/Solar-disc-with-proms-on-June2-375538874
by gabrieli
Sun Jun 02, 2013 10:54 am
Forum: This is SolarChat !!
Topic: All Quiet
Replies: 13
Views: 270

Re: All Quiet

Thanks, Mark I, personally, have to keep being reminded of this article. I still get upset when I see that my LS152 produces a hard to manage sweet spot in low magnification images. The reason is explained in the article. Just before spring, I was air dusting the internal ERF in my LS152 and noticed...
by gabrieli
Sat Jun 01, 2013 5:38 pm
Forum: This is SolarChat !!
Topic: Solar disc and proms from May31
Replies: 9
Views: 463

Re: Solar disc and proms from May31

Thanks so much, everyone. These first results with the Grasshopper3/LS80 have been very exciting especially since the partnered camera/scope hardware is the most manageable of any that I use and which, in some ways, produces the best and most consistent results. Next, I;m going to try to boost the m...
by gabrieli
Sat Jun 01, 2013 5:17 pm
Forum: This is SolarChat !!
Topic: Greetings and some white light stuff
Replies: 7
Views: 421

Re: Greetings and some white light stuff

These wonderful white light images make me anticipate the next large sunspot
by gabrieli
Sat Jun 01, 2013 12:56 pm
Forum: This is SolarChat !!
Topic: Broken filament+ proms from May 31
Replies: 8
Views: 368

Broken filament+ proms from May 31

Broken filament (Taken using an LS80 at 1120mm) A single frame, among those used to make the mosaic shown at http://giovannigabrieli.deviantart.com/art/Full-solar-disc-and-proms-on-May31-375081126 just above the 6 o'clock position (flipped vertically). Click Proms (LS152 at 1800mm + Grasshopper3) A ...
by gabrieli
Sat Jun 01, 2013 5:18 am
Forum: This is SolarChat !!
Topic: Solar disc and proms from May31
Replies: 9
Views: 463

Re: Solar disc and proms from May31

All the comments mean a lot to me especially since 3 years ago, I didn't know what I was doing. What the image doesn't show is the 5 or 6 steps I needed to even out the disc brightness from the center outwards. These involved using Duplicate layer, using levels, and then "painting" with th...
by gabrieli
Fri May 31, 2013 10:29 pm
Forum: This is SolarChat !!
Topic: 2013-05-26 @ 13-52-40gmt: The Sun in Ha -> 09 Tiles Full Disk Hi Res Mosaic
Replies: 16
Views: 1062

Re: 2013-05-26 @ 13-52-40gmt: The Sun in Ha -> 09 Tiles Full Disk Hi Res Mosaic ** New Mosaic**

Her's my vote for your second technique. A very natural transition between the dark red limb and prominences.
by gabrieli
Fri May 31, 2013 10:19 pm
Forum: Solar Scope Modifications
Topic: PST etalon in a double stack?
Replies: 12
Views: 1803

Re: PST etalon in a double stack?

Thanks for the info, Alan. I measured the distance from my camera's focal plane to the fixed draw tube mount (when image is in focus with a 2X Barlow) and found it to be 9.5 inches (241mm). It may be possible to put the collimating lens of the PST etalon in the required location fairly easily. This ...
by gabrieli
Fri May 31, 2013 9:54 pm
Forum: This is SolarChat !!
Topic: Full disc on May30
Replies: 7
Views: 295

Re: Full disc on May30

Merci, Michel

I try to make the filaments jump out of the page but, so far, I can only do that by inverting the image and using levels 4 or 5 times on duplicate layers and eraser tool. If that could happen
with a positive image and natural color, I would probably try that, too.
by gabrieli
Fri May 31, 2013 9:44 pm
Forum: This is SolarChat !!
Topic: Solar disc and proms from May31
Replies: 9
Views: 463

Solar disc and proms from May31

Mosaic using an LS80 and Grasshopper3. Just for the information of people using the same combination of hardware: Stacking (Six 300 frame avi's for 6 surface Tiffs and six 200 frame avi's for 6 prom Tiffs) takes about one hour and 20 minutes. Then, assembling the disc and proms, sharpening, etc. tak...
by gabrieli
Fri May 31, 2013 10:03 am
Forum: This is SolarChat !!
Topic: From a failed solar mosaic on May30
Replies: 4
Views: 80

Re: From a failed solar mosaic on May30

HI Alexandra.

By the time I took the 4 images used in the partial mosaic, I saw constant drifting clouds across my view and I knew any images of proms wouldn't stack well. Maybe next time.
by gabrieli
Fri May 31, 2013 1:52 am
Forum: This is SolarChat !!
Topic: From a failed solar mosaic on May30
Replies: 4
Views: 80

From a failed solar mosaic on May30

This 4 image mosaic was salvaged from 4 good frames taken with an LS152 at 1800mm and Grasshopper3. It shows great potential.

I was attempting a mosaic of half a solar disc but didn't quite get there due to clouds. Once the sky becomes more dependable, I'll try again.


by gabrieli
Fri May 31, 2013 12:52 am
Forum: This is SolarChat !!
Topic: Full disc on May30
Replies: 7
Views: 295

Full disc on May30

Another somewhat hurried mosaic with LS80 and Grasshopper3. (200 frames/avi/20% stacked)
Still waiting for a cloudless blue sky.





Higher res at

http://giovannigabrieli.deviantart.com/ ... -374912763

Click for enlargement
by gabrieli
Thu May 30, 2013 10:09 am
Forum: Solar Scope Modifications
Topic: PST etalon in a double stack?
Replies: 12
Views: 1803

Re: PST etalon in a double stack?

Thanks, Ken I had a feeling this would not be an ideal arrangement or it would be more widely used for double stacking. I do plan to try it anyway since it's a fairly easy easy mod (apart from getting the etalon position right). I do plan to use threaded 2" barrel extensions(from Televue) into ...
by gabrieli
Thu May 30, 2013 9:52 am
Forum: This is SolarChat !!
Topic: A quick full disc mosaic from May 29
Replies: 6
Views: 262

Re: A quick full disc mosaic from May 29

Thanks, everyone. Noise issues tend to be more troublesome in the prom section, where any attempt at brightening brings out unwanted artifacts.I usually try to use the middle levels slider to suppress these by darkening the sky and then using the highlight slider to bring the proms back. Even so, th...
by gabrieli
Thu May 30, 2013 2:06 am
Forum: This is SolarChat !!
Topic: Selection of my best timelapses with 130mm PST...
Replies: 16
Views: 583

Re: Selection of my best timelapses with 130mm PST...

Impressive images all, but I find the prom closeups especially fine.
Did you have to cut your tube(scary) or did your Barlow allow you to find the magic 200mm location for the etalon outside the optical tube?
by gabrieli
Thu May 30, 2013 1:54 am
Forum: This is SolarChat !!
Topic: A quick full disc mosaic from May 29
Replies: 6
Views: 262

A quick full disc mosaic from May 29

A threatening cloud bank inspired me to take twelve 100 frame avi's (disc and proms) from which I used the 20 best frames to generate 12 TIFFS to assemble into a full disc mosaic.




Higher res version at
http://giovannigabrieli.deviantart.com/ ... -374717778
by gabrieli
Tue May 28, 2013 11:11 pm
Forum: This is SolarChat !!
Topic: 27th May disc
Replies: 10
Views: 656

Re: 27th May disc

Hi John

That's really fine work on your mosaic.

I agree with you that sometimes coloring suppresses contrast and details. Sometimes, I play with the hue
adjustment to just give a hint of color.
I do like the way the colored version of your disk is easy on the eyes but that's my preference.
by gabrieli
Tue May 28, 2013 5:02 pm
Forum: This is SolarChat !!
Topic: Demo from a devoted double-stack doubter
Replies: 27
Views: 2514

Re: Demo from a devoted double-stack doubter

Recently, I've assembled and posted a number of 6 image mosaics with an LS80/Grasshopper3(2/3 inch sensor) combination taken at 1120mm focal length. I also tried one 6 image mosaic with my Grasshopper3 and LS152 at 1350 mm. The results with the LS152 didn't surpass the quality delivered with the LS8...
by gabrieli
Tue May 28, 2013 12:07 pm
Forum: Solar Scope Modifications
Topic: PST etalon in a double stack?
Replies: 12
Views: 1803

Re: PST etalon in a double stack?

Both the LS80 and LS152 have internal etalons. The PST stage 2 assembly would go where it normally goes - at the 2" eyepiece end of the scope.
by gabrieli
Tue May 28, 2013 11:30 am
Forum: Solar Scope Modifications
Topic: PST etalon in a double stack?
Replies: 12
Views: 1803

PST etalon in a double stack?

I have my PST etalon mounted in between stage 2 adapters asleep in its container but can't use it yet because I'm still waiting for my (defective) 150f12 lens to come back from Istar (repaired or replaced). I'm not ordering an ERF until I test the lens when returned. Has anyone used the PST stage 2 ...
by gabrieli
Mon May 27, 2013 11:32 pm
Forum: This is SolarChat !!
Topic: Solarscope - a range of filters
Replies: 26
Views: 1998

Re: Solarscope - a range of filters

Just to echo others' comments: your full disk is peerless as are the two monochrome double and single stack comparisons, really obvious in the highest resolution versions Is the SF70 a new addition? How long have you had a DSF100? I feel so jealous. I remember that you were having balance problems w...
by gabrieli
Mon May 27, 2013 3:10 pm
Forum: This is SolarChat !!
Topic: 201305124 LS80T Sun
Replies: 14
Views: 922

Re: 201305124 LS80T Sun

Fine image, Scott. I would also like more details.
by gabrieli
Mon May 27, 2013 12:30 pm
Forum: This is SolarChat !!
Topic: 2013-05-26 @ 13-52-40gmt: The Sun in Ha -> 09 Tiles Full Disk Hi Res Mosaic
Replies: 16
Views: 1062

Re: 2013-05-26 @ 13-52-40gmt: The Sun in Ha -> 09 Tiles Full Disk Hi Res Mosaic

Outstanding image, Fernando.

Just to continue with Derek's comment about sharpness falloff towards the edge (a common problem). Have you tried using layers in Photoshop to selectively sharpen or increase the contrast just in that area?
by gabrieli
Mon May 27, 2013 12:04 pm
Forum: This is SolarChat !!
Topic: What can I say? If it's not one thing, it's another (May 25)
Replies: 12
Views: 498

Re: What can I say? If it's not one thing, it's another (May 25)

Hi Fernando As John (Asimov) said, I would never take comments on this forum the wrong way, even criticisms. I took your question literally. You wanted to know why I prefer inversions. There was no hidden implication or tone in my response to you. It was also meant to be taken on face value. I don't...
by gabrieli
Mon May 27, 2013 11:48 am
Forum: This is SolarChat !!
Topic: Full disc and proms from May 26 (22 image mosaic)
Replies: 4
Views: 136

Re: Full disc and proms from May 26 (22 image mosaic)

This was basically a "dress rehearsal" for a mosaic that I'll try when the weather conditions are better, with both my LS80 at 1680mm and my LS152 at at 1350 mm. I think I've found out how to organize the whole process (how to avoid getting lost collecting images for the mosaics) but it's ...
by gabrieli
Mon May 27, 2013 4:53 am
Forum: This is SolarChat !!
Topic: Full disc and proms from May 26 (22 image mosaic)
Replies: 4
Views: 136

Full disc and proms from May 26 (22 image mosaic)

I'll try this again next day when the winds are supposed to die down. 12 images were used for the disc and 10 for the proms, each taken at 1680mm with an LS80, 22 avi's each consisting of 200 frames were distilled for each mosaic image. Higher res (click the image and enlarge text size for more ampl...
by gabrieli
Sun May 26, 2013 10:02 pm
Forum: This is SolarChat !!
Topic: AR1754 & AR1756 mosaic
Replies: 6
Views: 313

Re: AR1754 & AR1756 mosaic

Wonderful texture, Neo.
by gabrieli
Sun May 26, 2013 9:42 pm
Forum: This is SolarChat !!
Topic: What can I say? If it's not one thing, it's another (May 25)
Replies: 12
Views: 498

Re: What can I say? If it's not one thing, it's another (May 25)

I really appreciate all the comments, here. Thank you all so much. Fernando I understand that many people prefer "positive" images to inverted ones. When I first got into serious solar photography for the first time in summer of 2010, I was interested only in prominences - no interest what...
by gabrieli
Sun May 26, 2013 2:55 pm
Forum: This is SolarChat !!
Topic: What can I say? If it's not one thing, it's another (May 25)
Replies: 12
Views: 498

What can I say? If it's not one thing, it's another (May 25)

Thank you, wind, for reducing the amount of processing. Some avi's just would not stack properly. A Grasshopper3 was used in all cases with an LS80 Full disc mosaic Filaments Here are links to higher res versions http://giovannigabrieli.deviantart.com/art/Solar-disc-and-proms-on-May-26-373943310 htt...
by gabrieli
Sat May 25, 2013 10:56 am
Forum: This is SolarChat !!
Topic: Full and half discs on May 24
Replies: 8
Views: 243

Re: Full and half discs on May 24

Thanks for looking, everyone. For nice and easy full discs with my LS80, the Grasshopper3 is ideal. The disc brightness is very even looking, once on band. You also have the luxury of tweaking the ROI slightly for a better fit depending on the extent of the prominences. Despite this, I'm finding mos...
by gabrieli
Sat May 25, 2013 12:13 am
Forum: This is SolarChat !!
Topic: Full and half discs on May 24
Replies: 8
Views: 243

Full and half discs on May 24

Full disc (non mosaic) images with an LS80 and Grasshopper3




Solar half disc (3 image mosaic)




Attached files
by gabrieli
Tue May 21, 2013 11:07 am
Forum: This is SolarChat !!
Topic: Sol from the 17th and 18th of May 2013.
Replies: 19
Views: 1146

Re: Sol from the 17th and 18th of May 2013.

Tack sharp images, Eric. I can't quite identify the refractor in your thumbnail that I assume you used for your higher resolution images. Can you say what it is. I'm in the process of a 6"/f12 PST mod which is awaiting the objective lens. So, I 'd also be interested in the Ha add ons you used t...
by gabrieli
Mon May 20, 2013 11:53 pm
Forum: This is SolarChat !!
Topic: full solar discs and partial discs
Replies: 2
Views: 130

full solar discs and partial discs

The relatively low magnification of the LS80 was able to tame a hazy sun today. LS80 at 560 mm and grasshopper3 at 1900x1300. You can customize the ROI for best fit. Disc and proms (12 image mosaic at 1120 mm) Half disc mosaic with LS80 at 1680mm (4 image stitch) The higher res versions for the last...
by gabrieli
Mon May 20, 2013 12:22 pm
Forum: This is SolarChat !!
Topic: First Light Grasshopper 3 USB 3
Replies: 14
Views: 1185

Re: First Light Grasshopper 3 USB 3

Those are very fine images on your link, Jim. Although I bought my Grasshopper3 primarily for full disc, non mosaic images with my LS80 at 560mm, I've discovered it produces very finely detailed 6 image mosaics at 1120mm. There will be occasions where I will use it for its original purpose, but the ...
by gabrieli
Sun May 19, 2013 9:17 pm
Forum: This is SolarChat !!
Topic: Full solar disc/proms on May 19
Replies: 4
Views: 94

Full solar disc/proms on May 19

A 12 image mosaic (6 for the disc and 6 for the proms) taken with an LS80 and Grasshopper3 non inverted version inverted version Link to 24 Mp higher res version (you may have to click twice on the initial image) http://giovannigabrieli.deviantart.com/art/Full-solar-disc-and-prominences-on-May-19-37...
by gabrieli
Sun May 19, 2013 4:48 pm
Forum: This is SolarChat !!
Topic: Quick solar glimpse
Replies: 12
Views: 953

Re: Quick solar glimpse

Up to very high standards, as usual, Alexandra.
by gabrieli
Sun May 19, 2013 4:42 pm
Forum: This is SolarChat !!
Topic: Lunt Solar Wedge problem
Replies: 7
Views: 878

Re: Lunt Solar Wedge problem

To Spectral Joe I tried using a kleenex dabbed in acetone and, guess what? That worked. The kleenex had a black residue on it that I can only suppose was soot. I gave the filter a final cleaning with 97% alcohol since the acetone dried quickly and left marks and now the filter looks as good as new. ...
by gabrieli
Sun May 19, 2013 10:27 am
Forum: This is SolarChat !!
Topic: More from the 14th: WL hires and Halpha mosaic - WL 11745 added!!
Replies: 11
Views: 953

Re: More from the 14th: WL hires and Halpha mosaic - WL 11745 added!!

Marvelous images, especially the third one when enlarged.
by gabrieli
Sun May 19, 2013 12:39 am
Forum: This is SolarChat !!
Topic: Software for PGR grasshopper 3
Replies: 46
Views: 3455

Re: Software for PGR grasshopper 3

Hallelujah!

Jim:

Don't you love that feeling when you climb out of the depths up to the mountaintop?

Personally, I will resist changing the software I'm using now unless absolutely forced to.
by gabrieli
Sat May 18, 2013 10:17 pm
Forum: This is SolarChat !!
Topic: Full disc and proms from May18 (Grasshopper3)
Replies: 5
Views: 484

Full disc and proms from May18 (Grasshopper3)

The combination of Grasshopper3 and LS80 at 1120 mm looks like a perfect match for some great full disc mosaics.




Go to http://giovannigabrieli.deviantart.com/ ... -372418924
and click the image for a higher res version.
by gabrieli
Sat May 18, 2013 12:17 am
Forum: This is SolarChat !!
Topic: Lunt Solar Wedge problem
Replies: 7
Views: 878

Re: Lunt Solar Wedge problem

HI Ken:

I've had the Lunt wedge since April 11, 2011.

It saw regular use in 2011 and 2012 but little use this year since I've been using
Baader solar film more often. I really can't give any idea of the amount of exposure the wedge has seen.
by gabrieli
Fri May 17, 2013 10:05 pm
Forum: This is SolarChat !!
Topic: Lunt Solar Wedge problem
Replies: 7
Views: 878

Re: Lunt Solar Wedge problem

Thanks for the link, Mark. Both the eyepiece/filter holder and the 2" mounting snout seem to be secured with loctite and resisted a very hard effort with a boa. I may have to resort to a more destructive approach by cracking the filter, removing the pieces, and then replacing it with a new filt...