M 83 - new try .. must new try

[jsmoraes (Jorge)]

New try, but with full Moon. The exposure was limited to 60 sec because of background glow.

The process had attention to recover some red information to areas were the stars are born.

http://www.astrobin.com/107627/0/

GSO 305 mm - Canon T 3 - ISO 800 - 56 x 60 seg (60 min) - OAG - Coma Corrector - Skyglow filter.

note: the second photo is over-processed to identify some dust position. But what I found as important is a parallel and horizontal black line. I saw some time ago a post here about this matter. But I don't remember exactly who post and what was told. I need seach for it.

Any idea about it ?

[cometcatcher (Kevin)]

That's really good for a full moon shot! I'd get nothing lol.

The black lines, I think they are some kind of EMF running along the cable from camera to PC. You could try running the cable through some ferrite beads. Some cables have ferrite beads pre-installed.

[trickybilly]

Awesome

[jsmoraes (Jorge)]

Thank you, Kevin and Trickybilly. I think with better seeing I would get the quality that this galaxy deserves.

[tilbrook@rbe.ne (Justin Tilbrook)]

Hi Jorge,

Make sure that live view is off when doing your exposures.
If left on the camera can get up to 40 Celsius at the chip and it will create lines.

Cheers,

Justin.

[LightningNZ (Cam)]

Nice photo Jorge. The colours are great.

Flats will take care of the blemishes.
-Cam

[jsmoraes (Jorge)]

Thank you Justin and LightningNZ

Justin, up to now, I don't know why of that line. AC/DC power converter were discarded, and I am sure that Live view wasn't active.

About temperature: I never have notice of temperatur higher than 35 Celcius from BackyardEOS.

With original photos you can't see the line. It only appears when stacked and with intense enhancing in HDR curves. If I have good signals ... it isn't problem.

LightningNZ, the blemishes were on external surface of coma corrector. I have some ones,faint, over sensor, yet. They are in upper border of the sensor, near both vertice. They aren't great problem, since those area is worse area of coma and they only appear when I use strong manipulation of HDR curve.
I will try clean them in the next cleanner operation of sensor.

As Kevin suggests, I will try the ferrite. if it fails... I will forget for a while. That black line doesn't kill my photos.

The dark and flat files don't erase or hide the black line. Perhaps the problem is with electronic card or transmission over USB.

Canon is Canon. We use it to astrophotography, but they aren't astrophotograpic cameras. Faint signal always will be problem.