Jump to content

sgl_imaging_challenge_2021_2.thumb.jpg.72789c04780d7659f5b63ea05534a956.jpg

astrophotography with dobsonians?


Recommended Posts

Hi Dean,

I've done a bit of imaging with my dob. Here's a couple of my attempts;

http://stargazerslounge.com/index.php/topic,22752.0.html

http://stargazerslounge.com/index.php/topic,23885.0.html

Both were taken with a webcam, the first ones are just single shots and the second is a mosaic of several shots merged together.

Imaging can be done with a dob, but as Roy says you're limited to very short exposures or a series of very short exposures with a webcam.

Cheers,

Ian

Link to post
Share on other sites

Thanks Roy, the moon and maybe Saturn would be good. I do have a sky watcher 130pm, which is a 5.1” on an equatorial mount, but my dobsonian is a 12”

Link to post
Share on other sites

I did my first few shots of the Moon and Mars with a webcam on my dob. I couldn't crank up the magnification too much though and the avi files didn't have very many frames.

Link to post
Share on other sites

Try the Moon.

Eyepiece, 20mm or 32mm,

Flash off,

Focus infinity,

iso Moon 100,

iso planets 200 / 400,

depending on ep shutter speed 1/100sec 1/1000sec,

optical zoom only to get closer,

3 sec or 10 sec timer,

This is with a digi cam.

That is my next starting point when the sky is clear.

Also I am going to try movie mode and let the Moon just drift by.

Give it a go and try adjusting the settings.

Good luck Dean.

Bernie :rolleyes:

Link to post
Share on other sites

I've added that site to my favorates folder. Ive tried afocal with the lightbridge on the moon but had poor results. I may try again the next time the moon "interferes" with my quest to find every galaxy in the universe. (Well a man can dream cant he)

Link to post
Share on other sites

I've added that site to my favorates folder. Ive tried afocal with the lightbridge on the moon but had poor results. I may try again the next time the moon "interferes" with my quest to find every galaxy in the universe. (Well a man can dream cant he)

You do need a cam mount with a Digicam.
Link to post
Share on other sites
  • 3 weeks later...

You can do all forms of imaging with a dob but need some sort of drive. I think Mel Bartells did a very complex on. Alt Az drive with go to and something to rotate the focuser too. Bit over the top imho.

The best way is a poncet platform. This gives good tracking for something like an hour and then needs resetting. This looks to be a decent web link on the subject.

http://homepage.ntlworld.com/molyned/the_equatorial_platform.htm

There are loads on the web but I often find that the ones from Oz and the UK give most info on technical subjects.

John

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.