Search found 37 matches

by MrAstroBen
Wed Jan 16, 2019 12:40 pm
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 4553

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: 264

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: 264

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: 264

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: 20
Views: 935

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...
by MrAstroBen
Sat Jan 05, 2019 9:16 pm
Forum: Gallery
Topic: M42 chronicles
Replies: 20
Views: 935

Re: M42 chronicles

This will help in choosing a camera that meets requirements in terms of FOV and resolution. The resolution is a guide, very widefield images will be over 2 and still good. The FOV is your first concern. 20meg cameras sound great on paper or if you are used to daytime photography. Forget megapixels. ...
by MrAstroBen
Sat Jan 05, 2019 1:44 pm
Forum: Gallery
Topic: M42 chronicles
Replies: 20
Views: 935

Re: M42 chronicles

Don, I see many folks having similar issues. Unfortunately cameras with a 5s max exposure get sold as astro cams. If sensitive enough 5s is plenty for use as a guide camera. A camera with a 5s max exposure though will give you a hint of what is up there. It will never get you a nice DSO image. Very ...
by MrAstroBen
Mon Sep 24, 2018 7:12 am
Forum: How do I?
Topic: Auto exposure and Altair 290M
Replies: 8
Views: 480

Re: Auto exposure and Altair 290M

Robin, Put the 290M back in my dome last night. Downloaded the latest version of 3.2 Set auto exposure. It chose 13.1 sec which gave a reasonable histogram at about 10pm. Started a 12hr capture of .ser Re checked at 11pm. Histogram was low, exposure not changed from 13.1s Stopped sharpcap. Restarted...
by MrAstroBen
Mon Sep 24, 2018 6:44 am
Forum: Bug Reports
Topic: Wrong file format selection
Replies: 1
Views: 176

Wrong file format selection

Altair or ZWO camera Save profile after deselecting auto file format and choosing .ser Re open sharpcap, reload the saved profile and sometimes it chooses fits instead of the file type in use at the time of pressing save Preference set to .ser for video and fits for stills. Also, sometime after maki...
by MrAstroBen
Sun Sep 16, 2018 10:33 am
Forum: How do I?
Topic: Auto exposure and Altair 290M
Replies: 8
Views: 480

Re: Auto exposure and Altair 290M

Thanks Robin, that sounds good for All Sky use. Especially in day time or if the moon is up average exposure for the majority of the fov works best. Speed of change is less critical. Out of interest, how does it choose an exposure value, from the mid point of the histogram after any user limits are ...