Search found 52 matches

by MrAstroBen
Thu Mar 07, 2019 5:28 pm
Forum: Live Stacking
Topic: No alignment found!
Replies: 28
Views: 3549

Re: No alignment found!

Watching those late night internet videos uses the last of your processing power then.
by MrAstroBen
Mon Mar 04, 2019 8:18 pm
Forum: General Discussions
Topic: Using a CS lens for polar alignment tool?
Replies: 3
Views: 473

Re: Using a CS lens for polar alignment tool?

Thanks. I may try a 60mm then. More compact and can pick those up for little.

Thanks Rob
by MrAstroBen
Mon Mar 04, 2019 11:02 am
Forum: General Discussions
Topic: Using a CS lens for polar alignment tool?
Replies: 3
Views: 473

Using a CS lens for polar alignment tool?

I have a couple of Astrotrac mounts and wish to use Sharpcap for polar alignment. A CS lens fitted to my 290M camera would be the neat solution. Question is how short a focal length could I get away with before pixel scale could affect the results? Has anyone tried this? 100mm CS lens would give 5.9...
by MrAstroBen
Sun Mar 03, 2019 3:19 pm
Forum: Gallery
Topic: What long exposures do.
Replies: 5
Views: 560

Re: What long exposures do.

Nick, Shot through a 7nm Ha filter. My sky pollution is 6/7 . I can run about 240s through an L filter. There is little luminance data in the Rosette so i will just capture RGB next. Use the Ha as Luminance. Open a second copy of the Ha and mix that with the red channel. Using a CCD removes the diff...
by MrAstroBen
Sat Mar 02, 2019 7:28 pm
Forum: Gallery
Topic: What long exposures do.
Replies: 5
Views: 560

What long exposures do.

Rosette Nebula NGC2238 Polar alignment using Sharpcap Camera Atik One 6.0 CCD Ha filter Scope TS optics 65Q Mount HEQ5 Rowen belts Guiding PHD2 Control EQMod Stacked in APP Levels in DXO Exposure 46 x 600s taken over two nights With a CCD there is no gain or black/off set to worry about Cooling -10d...
by MrAstroBen
Wed Jan 16, 2019 12:40 pm
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 10299

Re: Another Offset Question

Reading this makes me love my CCD even more 😉
by MrAstroBen
Fri Jan 11, 2019 12:40 pm
Forum: How do I?
Topic: Brain Function and Narrow Band
Replies: 25
Views: 1834

Re: Brain Function and Narrow Band

I understand your limits here as I am also in the UK. Easy to get caught out with cloud hitting and no blue channel aquired. I now set my filter sequencer to get 2 or 3 of each filter. My focus is close enough on each not to worry. then repeat as opposed to trying say 10+10+10+10 Other option is tim...
by MrAstroBen
Fri Jan 11, 2019 12:17 pm
Forum: How do I?
Topic: Brain Function and Narrow Band
Replies: 25
Views: 1834

Re: Brain Function and Narrow Band

Also, most CCD cameras are 16bit. That gives a massive increase in the range. A very useful asset. Tiny differences in published read noise are irrelevant in comparison.
by MrAstroBen
Fri Jan 11, 2019 12:04 pm
Forum: How do I?
Topic: Brain Function and Narrow Band
Replies: 25
Views: 1834

Re: Brain Function and Narrow Band

H The image below is 7 stacked Ha 7nm Baader filter images as calculated by the brain at 296 seconds straight out of the live stack auto stretched with no dark or flat calibration the viewing was not great that evening. https://farm8.staticflickr.com/7821/45783801495_4c4cd896b7_z.jpg Stack_7frames_...
by MrAstroBen
Sun Jan 06, 2019 3:46 pm
Forum: Gallery
Topic: M42 chronicles
Replies: 25
Views: 3223

Re: M42 chronicles

Don, Yes you have done well to get an image like this given the limits of the camera. My comments are to assist anyone reading this. While its possible to overcome difficulties, the points I would like people to note are. Whatever the equipment, follow good practice. It is not as complex as it seems...