Autumn Solar Halos

08.11.2010

123 image stack.

 

100 image stack.

A single frame.

Autumn halo display

08.10.2010

 

Here's a random shot during the event, not very impressive though, rest of the shots were more or less the same but sufficient enough to stack.

Forgot to mention that the image above consists of 113 frames stacked together with help of a Registax software.
 

Bright 22 halo

07.6.2010 (17:18 - 17:38 GMT +2, 42 frames)

 

For this simulation the main contributor are randomly oriented short-shaped column crystals. Minimum amount of plates were used for parhelias and for weak CZA. Long-shaped columns were used for weak tangent arc and for upper suncave Parry arc, the latter shows up faintly on the stacked photograph.
It's worth to mention that in case when randomly oriented long-shaped columns were used the 22 halo bocame very diffuse so shorter columns were needed. The software used for simulating this display is Halopoint 2.0 by Jukka Ruoskanen.

Single frame vs. 42 frames stack comparison

 

This was one amazing summer display, the sun was low but halo is still full.

 

47 image stack.

Halo display

17.6.2010

51 image stack.

19 image stack.

17 image stack.

Can you spot the infralatereal arc ?

22 halo in the morning

21.4.2010

30 image stack.



Multidisplay

08.6.2010

On imag above the separation between the CZA and 46° halo is visible particularly well. The sun elevation is 28.9-27.6°.

After enhanceing the image in Photoshop the supralatereal arc becomes visible as well. Note: there is also an infralatereal arc on the right side.

 

Here the sun elevation is 21.5-19.6°. 22° halo still remains strong and tangent arcs are clearly fainer than 22° halo. My vote goes to 46° halo.

Strong 22 halo

03.6.2010

What a nice morning treat !

Had some hard time blending the stack and single frame into one and not loosing the lower part of the 22° halo during the process.

 

Bright sun halos

27.4.2010

 

Supralatereal arc

23.4.2010

40 image stack.

 

Low pressure halos

17.4.2010

HDR stack

 

 26 frames.

 

1st April halos

01.4.2010
I know I can do better post-processing than this and really don't know why I bothered myself with this stack. On the other hand, somewhat rare halo form showed up against the sensor noise and artifacts caused by excessive USM sharpening. Can you spot it too ?
---
Tegelikult ma oskan fotosid paremini töödelda ning need kaks pole mitte parimate killast. Tegelikult kui aus olla, siis ma ei tea üldse miks ma ennast nendega vaevasin. Teisest küljest, peale fototöötlust ning hoolimata fotosensori mürast paljastus mõnevõrra haruldane halo. Kas sina ka märkad seda ?

HDR test

I thought why not to give HDR technique another try. For this test I used photos from 19.4.2009 display. I captured 3 exposure-set in every 40sec. So it's 45 photos in 10 minutes. Again Photomatix was used to create 15 tone mapped and details enchanced HDR files which were then stacked in Registax. And as always a Photoshop usm filter was applied with moderate settings.

And here is somewhat enhanced verison to bring out the fainter 46° halo.
---

Mõtlesin, miks mitte anda HDR tehnikale veel üks võimalus. Kuna praegu on halo-vaene periood, siis kasutasin fotosid 19.4.2009 vaatemängust. Iga 40 sekundi tagant sai tehtud särikahvel, seega 10 minuti jooksul klõpsisin 45 fotot. Igast särikahvli kolmest kaadrist tegi Photomatix ühe "tone mapped" ja "details enchanged" HDR faili. Arvestades fotode kogust ja särikahvli jaoks vajalikku 3 kaadrit, tuleb kokku 15 HDR faili, mille stäkkimiseks kasutasin Registax nimelist programmi. Tulemuse laadisin Photoshop'i, kus lisasin USM filtri, et välja tuua mõnevõrra nõrgemad halod.

Siin on samast pildist veel üks töödeldud versioon, et välja tuua 46° halo.

22 halo and sundogs

05.5.2007

A nice spring halo montage from 2007.

---

Montaaž kahest pildist. Halo ülesvõte aastast 2007.

September optics

04.9.2009




11.9.2009


12.9.2009


16.9.2009




18.9.2009


24.9.2009

Morning halos

26.8.2009

A nice beginning of the day...a faint upper suncave Parry, 22° halo and tangent arcs...
---
Ilus päeva algus...ülemine päikesepoolne Parry kaar, 22°halo ja puutujakaared...


...later around a lunch time the sun climbs higher and the Parry stuff is gone for good.
---
...hiljem, lõuna paiku, päike ronib kõrgemale ja Parry kaared on kadunud.

22 tangent arcs

23.8.2009

A bright halo. My old Canon dslr simply can't present the brightness-contrast rate and colours properly. I guess modern dslr's can do this job way better.

Upper sunvex Parry arc

15.8.2009

The upper V-shaped arc is known as sunvex Parry arc which is very rare sight in upper cloud layers.

Another Parry suncave

30.7.2009

Faint Parry suncave

29.7.2009

Here a faint upper suncave Parry arc. 12 image stack. Single frame reveals only tangent arcs, no trace of Parry. Interestingly this display is formed only by the column shaped ice crystals, no plate crystals here.


Same stack as the above image but without the Usm filter.

Parhelias at parking lot.
About 2 hours later column arcs are vanished and replaced by the plate crystals.

Update for an old post

I have got some free time in my hands so I decided to work on some old photographs. This stack is made of 8 frames and should belong in this entry.

11.5.2009


After some heavy unsharp masking in Photoshop parhelias and tangent arcs are revealed. Some would call this hair-splitting and I agree on this.