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Sunday, November 26, 2023

My new astrophotography rig



It's been a while since I last posted something here, but it's also been a very eventful period, in which I got a new job and moved to Denver, Colorado, to start with.

As usual, it wasn't long after I moved that I started looking for Astronomy activity in the area and Astronomy clubs I could sign up to. After a few months I found the Denver Astronomical Society (DAS), and attended one of their monthly meetings, the first one held in person after the pandemic. It was open to the public, not just members, which inmediately made me think it was the right kind of club for me. And I was not wrong. From the first moment, I felt welcomed and treated like an equal. People there were very open and eager to share, just like I always thought an amateur astronomer should be, given that our main goal is to spread the knowledge while enjoying being around it. 

I already belonged to 2 previous organizations, AZAFA and GAZ, both from Maracaibo, Venezuela, my city of origin, and even though AZAFA was from late 80s to early 90s, and GAZ was from 2008 to the moment I had to leave the country, I never really stopped being part of them. One curious thing, though, is that contrary to my previous two experiences, this time I was one of the youngest in the room. I was refreshing and invigorating to see all those senior citizens active and participating, eager to help and volunteering where people were needed. 

Before the meeting started, I approached one of them and started making conversation. I asked him if he was doing astrophotography and he said yes. He had an iPad with him and asked me if I wanted to see his photos. Of course, I said with anticipation. Boy, was I not wrong. That was the best collection of astrophotography I had ever seen. They were out of this world. His name is Douglas Triggs, and out of curiosity you should look for him in astrobin.comI left the meeting with this feeling: I have a lot to catch up to. Soon after that, I started to look for a mount to buy. Since I already had a camera and a telephoto lens, I thought I should start small and grow little by little, as my budget allowed me to. I wanted a tracker, something very portable and affordable that would allow me to make good astrophotography pictures anywhere without crashing the family budget. 

So I ordered online the Sky Watcher Star Adventurer GTI mount and went to Mile High Astronomy, an astronomy store in Denver, and saw the Sky Watcher Evolux 62ED, a new small refractor. I fell in love with it immediately. It was lightweight, portable and looked sturdy and well made. It was on promotional sale at a considerably lower price, and it was Leyla, my wife, that pushed me into buying it with the incontrovertible argument that "you're already 63, when are you going to leave this for?". I also bought the flattener/reducer for that telescope and a solar filter, for the coming solar eclipses.

This is my first telescope and mount, the very first bought with my money and effort, and it's only mine. That left me with a sensation of achievement and pride. 

As soon as the mount arrived, I proceeded to assemble the rig and test how it worked. The mount is controlled with an app from your phone or tablet. It's Sky Watchers app for most of its mounts, called SynScan. You connect your phone to the mount's wifi signal and you operate it over a fairly simple environment. The mount is an upgrade over its predecessor, the Star Adventurer 2i. This one is sturdier, and has GOTO capabilities.

As it usually happens when you're too excited and eager to use your new toys, the weather didn't help. I had to wait several weeks, until the summer was over to be able to access clear skies. It was painful to have it and not be able to use it. The number of nights I had to take full advantage of my new equipment was limited, I knew that when I bought it, given the little free time my job leaves me for my leisure activities.

In the following weeks I completed the setup. The mount works with 12V DC, so I bought a 12V/5V power pack to power the mount and recharge the phone. I also bought a couple spare batteries and charger for the camera, and a telephone holder to attach it to the tripod.

The phone I use for controlling the mount is an old one with no carrier that connects fine to the mount. No special speed or display capabilities are needed for the app to work properly, so that way I can keep my phone for other matters.

So this is it, my new rig in specs:

Telescope: Sky Watcher Evolux 62ED - 400 mm f/6.45

                  w/ Flattener/reducer 0.9X - 360 mm f/5.8

Mount:       Sky Watcher Star Adventurer GTi with tripod

Camera:    Canon EOS 250D (DSLR) unmodified - APSC sensor

Software:  SynScan to control the mount, polar align, GOTO and to control the                      camera with the intervalometer

                 

My first telescope and mount




Federico Arribas


Monday, May 16, 2022

Lunar eclipse May 15 2022

 Lunar eclipse of May 15 2022 at totality. 


Location: Ocala, FL USA
Date: May 15 2022
Time: 23:44 EST - 4:44 UTC
Camera: Canon EOS 250D (Rebel SL3)
Lens: 55-250mm f/5.6 @ 250mm
Exposition: f/5.6   1/3 seg   ISO 800
Sky: Bortle 6
50% Crop (3000x2000 px)

Wednesday, April 27, 2022

4 Planets Line Up

A wonderful planet alignment taken by Federico Arribas early in the morning at Ocala, Florida USA on April 19th 2022. The 4 planets line up are, from left to right: Jupiter, Venus, Mars and Saturn. Taken with a smartphone handheld.

Fig. 1 Picture captured with a smartphone handheld and non-processed .

Tuesday, August 24, 2021

Milky way

Astrophotography of the Milky Way, in the Scorpio and Sagittarius zone, taken from Las Cañadas del Teide in Tenerife, Canary Islands, Spain, on August 07, 2021, by Rómulo Márquez.

Fig. 1 Processed and cropped picture.

Wednesday, January 27, 2021

THE CASE OF THE STAR ADVENTURER



By Federico Arribas and José Luis Martín
Ever since we bought the Sky-Watcher Star Adventurer star tracker we have been thinking of getting a case to carry it. For that purpose we embarked in a search for the best suitable case: should it be soft or hard surface?, plastic or metal?, wheels or no wheels?, how big or small?

Wednesday, January 6, 2021

The Pleiades (M45)

Astrophotography of the open star cluster Pleiades (M45), taken from Tenerife (Canary Islands), on January 5th, 2021, by Rómulo Márquez and processed by Federico Arribas.

Fig. 1 Processed and cropped picture.

Wednesday, December 30, 2020

Moon-Jupiter-Saturn Conjunction

We show a series of artistic compositions related to the conjunction between The Moon, Saturn and Jupiter during the month of December 2020, taken either from Oviedo or Vitoria-Gasteiz. The pictures are the best we could get given our local and individual circumstances, and we managed to register and enjoy the event.


  • Jupiter-Saturn-Moon conjuction image taken from Oviedo, Spain, on December 17th, 2020, by Federico Arribas. Two planes passing can be observed in the photograph, one just below the moon (yellow trail) and another on the lower left corner of the picture leaving a faint contrail.

Saturday, November 14, 2020

A NIGHT TO REMEMBER

By Federico Arribas

“...Just then, the evil Guayota kidnapped the sun`s god Magec, and took him with him to the interior of the volcano Teide, plunging everybody into a total darkness. It is when the guanches asked for clemency to Achamán, - their supreme god - where, after a fierce fight, Achamán managed to defeat Guayota, took Magec out of Echeyde's entrails, and plug the crater with Guayota inside…”

From Guanche mythological culture.


Last September I went to visit my good friend Rómulo Márquez to Tenerife answering to a very kind invitation on his part. Among the many things we planned to do in the excitement of the occasion, we included more than one observational night to take pictures, as Tenerife’s El Teide volcano location is regarded as having one of the darkest and clearest skies in the world. He also planned for a visit to La Palma, also known as Isla Bonita by the locals, one of the 3 out of eight islands he hadn’t already visited. Both places are home of several local and international observatories we wanted to visit. Of our big observational plans, which included a Messier Marathon promoted by IAC for Saturday 19 on La Palma, we were able to complete only that Saturday night of astrophotography and observation in La Palma, ending up being one big success and producing our very first more-than-decent set of deep sky images ever, against all odds. This is the story of that night and its outcome.

Tuesday, November 10, 2020

Triangulum Galaxy (M33)

Astrophotography of M33, Triangle Galaxy, taken from La Palma, Canary Islands, Spain, on September 20th, 2020, by Rómulo Márquez and Federico Arribas. 

Fig. 1 Processed and cropped picture.

Andromeda Galaxy (M31)

 Astrophotography of the Andromeda Galaxy (M31), taken from La Palma (Canary Islands), on September 19-20, 2020, by Rómulo Márquez and Federico Arribas.

Fig. 1 Processed and cropped picture.