luni, 25 martie 2013

Canon 600D - JTW astronomy mooded




Asta primeşti în cutie. Camera, alimentator universal la 220V şi cablu de date USB.
This is what you get, mooded camera, power source at 220V and USB cable.

Carcasa camerei a fost înlocuită cu o carcasă făcută din aliaj de aluminiu aerospaţial 7075 care este printre puţinele aliaje care poate fi prelucrat la o grosime de 1 mm.

Peltierul face transferul de căldură în 2 etape cu o eficienţă mărită şi un consum de numai 50W, dar care poate răci la ∆T = -80oC. La 15V puterea peltierului este de 85W, la 12V este de 60W.
Its 7075 aerospace alloy, one of the few alloys that can withstand machining to 1mm thicknesses. The peltier is a 2-stage high powered job with a max thermal transfer of just 50W, but we can still cool to delta T of -80 with it. At 15V the power of peltier element is 85W, at 12V is 60W.



Sistemul de răcire, aici se poate vedea radiatorul supradimensionat, care elimină surplusul de căldură de la elementul peltier care este în contact cu senzorul camerei, şi pe care îl duce cu multe grade sub temperatura mediului.
The cooling system, here you can see oversized radiator that removes excess of heat from the peltier element wich is in contact with the camera sensor that leads it to many degrees below ambient temperature.

 Camera are o greutate rezoonabilă de 1117 grame.
The weight of camera, 1117 grams is reasonable.

Camera împreună cu reducătorul/corectorul William Optics PFLT-4 are 1640 grame.
Here is camera and reducer/flatner WO PFLT-4, 1640 grams.




Camera împreună cu reducătorul/corectorul William Optics PFLT-4 ataşate refractorului William Optics Megrez 90mm APO.
Camera and WO PFLT-4 attached at WO Megrez 90 mm APO refractor.

Acum, partea tehnică, am facut dark-uri de 600 secunde şi bias-uri la ISO 800.
Now tehnical part, biases and darks at 600 sec at ISO 800.


Bias, 1/200 sec, ISO 800 processed in PixInsight
1.open file,
2.SampleFormatConversion at 32Bit
3.Histogram Transform
4.Save as .tiff
5.PS6 ->open,
6.resize
7.save for web.


Master Bias 100x processed in PixInsight
1.open file,
2.SampleFormatConversion at 32Bit
3.Histogram Transform
4.Save as .tiff
5.PS6 ->open,
6.resize
7.save for web.



Dark, 596 sec, ISO 800 processed in PixInsight
1.open file,
2.SampleFormatConversion at 32Bit
3.-
4.Save as .tiff
5.PS6 - open,
6.resize
7.save for web.

Urmează testele în teren, când vremea şi-o reveni.
Now i expect the weather to get better to test the camera in the field.

Primele concluzii:
1.Constructia este solida, cu materiale de bună calitate.
2.La acest model conexiunea camera-telescop se face prin intermediul unui inel T2 dar am înţeles că se lucrează la un sistem de adaptare a lentilelor, primul sistem având probleme cu focalizarea, aşa că se lucrează la o versiune mai subţire.
3.Ventilatorul este silentios desi este de dimensiuni mari.
4.Disiparea căldurii se face destul de bine, corpul camerei neîncălzindu-se foarte mult.
5.Camera are filtrul obişnuit înlocuit cu un filtru IR/UV care permite ca 98% din radiaţiile h-alfa să treacă, făcând astfel camera de 4 ori mai sensibilă decât una nemodificată.
6.Camera este sigilată complet, având în faţa senzorului o sticlă transparenta tratată multistrat cu rol antireflex şi de sigilare, fiind asamblată într-o incintă sigilată de asemenea, deci nici-o problemă cu urmele de praf de pe senzor. 
7.O sa vorbesc cu Mark să se gândească la un sistem de protecţie împotriva supraîncălzirii.
8.Nu am reusit ca sa setez bine BYEOS-ul, sunt la primele utilizări, ca să vă transmit şi temperaturile exacte până la care a ajuns răcirea.



First conclusions:
1.Solid construction with very good quality materials.
2.At my model the conection camera-scope is an T2 ring, but they work at an lens adapter, the first system heaving problems to focus so they gonna make another version of adapter, more thinner - then you can use clip-in filters.
3.The fan is very quiet even though it is large.
3.Heat dissipation is good, the camera body stays pretty cool.
4.The IR-cut filter is replaced by an IR/UV filter that permits 98% of h-alfa rays to pass, so camera is 4 times more sensible that an unmooded camera.
6.The camera is completly sealed, it has in front of sensor an clear glass threated multicoated and antireflex wich acts as sealant, it is assabled in an dust-free chamber, so bye, bye dust on sensor.
7.I will talk with Mark to think at an overheating protection system, they are anouncing very hot summer days.
8.Mea culpa, being first time user of BYEOS I didn't make it to show you the temperatures of the frames...it would be very COOL!!!!!


Clear skies,
Sabin

Later edit:






Streched in PI
5:1 from central area cropped

miercuri, 20 martie 2013

Cometa C/2011 L4 Panstarrs

Deși am plecat special ca să pozez această cometă, a treia oară, m-am lăsat păgubaș pentru că nu reușeam să dau de ea, așa că m-am apucat să pozez frumosul apus liniștit și plin de culoare.
După câteva cadre, pe o fotografie făcută cu Samyang-ul de 14mm am avut o surpriză foarte plăcută, era acolo, cometa pe care o căutam de 3 seri.

Cadrele luate cu celebrul de acum Canon 50D și cu Samyang 14mm f/2.8 și Carl Zeiss 50mm f/1.4



sâmbătă, 23 februarie 2013

M42 - Hubble Legacy Archive

capture Hubble telescope
processed by Sabin Fota in Pixinsight and PS


JANUARY 11, 2006: In one of the most detailed astronomical images ever produced, NASA's Hubble Space Telescope captured an unprecedented look at the Orion Nebula. This turbulent star formation region is one of astronomy's most dramatic and photogenic celestial objects. More than 3,000 stars of various sizes appear in this image. Some of them have never been seen in visible light. These stars reside in a dramatic dust-and-gas landscape of plateaus, mountains, and valleys that are reminiscent of the Grand Canyon. The Orion Nebula is a picture book of star formation, from the massive, young stars that are shaping the nebula to the pillars of dense gas that may be the homes of budding stars.
     This dramatic image offers a peek inside a cavern of roiling dust and gas where thousands of stars are forming. The image, taken by the Advanced Camera for Surveys (ACS) aboard NASA's Hubble Space Telescope, represents the sharpest view ever taken of this region, called the Orion Nebula. More than 3,000 stars of various sizes appear in this image. Some of them have never been seen in visible light. These stars reside in a dramatic dust-and-gas landscape of plateaus, mountains, and valleys that are reminiscent of the Grand Canyon.
     The Orion Nebula is a picture book of star formation, from the massive, young stars that are shaping the nebula to the pillars of dense gas that may be the homes of budding stars. The bright central region is the home of the four heftiest stars in the nebula. The stars are called the Trapezium because they are arranged in a trapezoid pattern. Ultraviolet light unleashed by these stars is carving a cavity in the nebula and disrupting the growth of hundreds of smaller stars. Located near the Trapezium stars are stars still young enough to have disks of material encircling them. These disks are called protoplanetary disks or "proplyds" and are too small to see clearly in this image. The disks are the building blocks of solar systems.
     The bright glow at upper left is from M43, a small region being shaped by a massive, young star's ultraviolet light. Astronomers call the region a miniature Orion Nebula because only one star is sculpting the landscape. The Orion Nebula has four such stars. Next to M43 are dense, dark pillars of dust and gas that point toward the Trapezium. These pillars are resisting erosion from the Trapezium's intense ultraviolet light.   The glowing region on the right reveals arcs and bubbles formed when stellar winds - streams of charged particles ejected from the Trapezium stars — collide with material.
     The faint red stars near the bottom are the myriad brown dwarfs that Hubble spied for the first time in the nebula in visible light. Sometimes called "failed stars," brown dwarfs are cool objects that are too small to be ordinary stars because they cannot sustain nuclear fusion in their cores the way our Sun does. The dark red column, below, left, shows an illuminated edge of the cavity wall.
     The Orion Nebula is 1,500 light-years away, the nearest star-forming region to Earth. Astronomers used 520 Hubble images, taken in five colors, to make this picture. They also added ground-based photos to fill out the nebula. The ACS mosaic covers approximately the apparent angular size of the full moon.
     The Orion observations were taken between 2004 and 2005.

M42 - protoplanetary disk


M42 - protoplanetary disk, little version

joi, 21 februarie 2013

M51 - Hubble Legacy Archive

aquisition Hubble telescope
processing PixInsight


The Whirlpool Galaxy (also known as Messier 51a, M51a, or NGC 5194) is an interacting grand design spiral galaxy in the constellation Canes Venatici. Recently it was estimated to be 23 ± 4 million light-years from the Milky Way galaxy but different methods yield distances between 15 and 35 million ly. Messier 51 is one of the best known galaxies in the sky. The galaxy and its companion (NGC5195) are easily observed by amatur astronomers, and the two galaxies may even be seen with binocilars. The Whirlpool Galaxy is also a popular target for professional astronomers, who study it to further understand galaxy structure (particularly structure associated with the spiral arms) and galaxy interactions.

miercuri, 20 februarie 2013

NGC4038 - Hubble Legacy Archive

aquisition Hubble telescope
processing Pixinsight


The Antennae are undergoing a galactic collision. Located in theNGC4038 group with five other galaxies, these two galaxies are known as the 'Antennae' because the two long tails of stars gas and dust thrown out of the galaxies as a result of the collision resemble the antennae of an insect The nuclei of the two galaxies are joining to become one giant galaxy. Most galaxies probably undergo at least one significant collision in their lifetimes. This is likely the future of our Milky Way when it collides with the Andromeda galaxy Two supernovae have been discovered in the galaxies: SN 2004GT and SN 2007sn.
A recent study finds that these interacting galaxies are closer to the Milky Way than previously thought—at 45 million light-years instead of 65 million light-years.












luni, 14 ianuarie 2013

M45 - Pleiadele



Pleiadele erau însoțitoarele lui Artemis, au fost cele șapte fiice ale titanului Atlas cu Pleione, sirena născută pe muntele Cyllene. Ele sunt surori cu Calypso, Hyas, Hyadele și cu Hesperidele. Împreună cu cele șapte Hyade erau numite Atlantide, Dodonide sau Nysiade.


Pleiadele sau Messier 45 - roi stelar deschis aflat la 433 ani lumină. Conține aproximativ 350 de stele într-o regiune a spațiului între 30 și 70 ani lumină. Vârsta stelelor din roi este de aproximativ 100 de milioane de ani.




Data: 12-13.ian.2013
Locatie: Valea Izvorului, Romania
Telescop: Megrez 90mm APO, f/6,2 la F=558mm
Camera: Canon 50D, P-FLT4 reducător la F=432 mm controlată de APT
Filtru: -
Ghidaj: TS 8x50 cu Alccd5 controlată de PHD guiding
Montură: CGEM
Expuneri: 7x600 secunde - 70'
ISO: 800
Software: Pixinsight, PS6