M 83 - ngc 5236

[jsmoraes (Jorge)]

Some days, or better, some nights you must change the observatory by bedroom !

Many problems with crash of PHD2, clouds, fogs, dusts over coma corrector, Moon's light... and ME !

Planned to be 20 lights and 3 Halfa. But only 8 from 10 were used. Lack signals, there !

It would be a good photo ! Undoubtly, it would ..

GSO 305 mm - Canon T3 - ISO 800 - 8 x 2 min (18 min) - OAG - Skyglow Filter - Coma Corrector

http://www.astrobin.com/105624/0/

[cometcatcher (Kevin)]

Well, the lack of exposure shows in noise, but geez you have some nice detail there.

[raymo]

Very nice Jorge. Something for me to aspire to.
raymo

[jsmoraes (Jorge)]

Thank you for comments, Kevin and Raymo. If I had more photos to stack, the result would have less noise and more sharp details. Perhaps with add from Halfa some red areas, where stars are born, would be visible, too.
I didn't understand what happens with PHD2. It constantly lost contact with my ASI120MC guiding camera. The problem seems to have been solved when I deactivated the Internet connection.
Really I didn't understand. And at this moment, clouds and fogs vanish with the sky.

The image, now, shows many impressive details of galaxy. For an umnod Canon it was a great result !

No matter... I will try again !

[BruceG (Bruce)]

I have my first M83 cooking as I write this. I hope that mine will be half as god as yours. An amazing amount of detail for such a short integration.
Mine will be much smaller due to my wider FOV.
Congratulations for teasing out such detail.
Bruce.

[jsmoraes (Jorge)]

Thanks for comment, Bruce.

I always try to publish two versions of my photos. One with an wide view and other with close view. Both show different contents. The wide, the object inside the sky. The close, the internal structure of object. Some times it seems to be two different objects !

My set of equipment has a good performance to close view. It has good resolution. And normally we see the objects in wide FOV. Because this I always will try to publish a close view.

[rustigsmed (Russell)]

Hi Jorge,

Really nice result, the extra resolution gained with the 12" aperture is obvious in this photo. really hope you manage to get some more data on this target - it will definitely be worth the effort!

Cheers,

Russ

[jsmoraes (Jorge)]

Thank you, Russel, and be sure: I am waiting that Moon goes sleep to catch again. As you said: it will definitely be worth the effort!

[astronobob (Bob)]

There is some awesome details in that Jorge, lots of potential for you rig by the looks, good stuff
I see you were guiding, and wondering why such short subs, this would benefit greatly with 5 min subs or longer
Nice job with it all the same as is tho, grouse resolution ..

[jsmoraes (Jorge)]

Thank you, Bob. I use the ISO and exposition taking in account the histogram graphic. If I use long time of exposure I can get images with high background glow.
If I can use less ISO to reduce the noise... I do it.
If I have some problem or troubles with clouds or guiding ... I use less time of exposure and higher ISO.

I perceive that DSLR is different from others cameras. Some times to use long exposure or high ISO cause saturation of stars and loose of theirs colors.

My best configuration is ISO 400 and 4 minutes. Or ISO 800 and 2 minutes that is very similar. And this, because of skyglow filter. My observatory is under attack from a battery of street lights ! From a radical and idiot group of public workers that install them !

I needed increase the height of the walls of my observatory to protect the OTA.