Jump to content
  • Join the online East Midlands astronomy club today!

    With active forums, two dark sites and a knowledgeable membership, East Midlands Stargazers has something for everyone.

Recommended Posts

Not very happy with this M33, I tried some 300s exposures with the Tri Band filter. Not happy with the focus 

and more noise than I thought there would be. kept the Gain at 400 perhaps i should have raised that?

Anyway 18 x 300s with the usual kit. Any comments welcome...



Link to post
Share on other sites

At least you have an image Ron. 👍


Very dark background perhaps over processed trying to kill the noise.

I would have thought increasing the gain would have an associated and compound increase in noise.

If anything I would decrease the gain.

What other camera controls do you have on that camera.

Link to post
Share on other sites

I'm no expert at these types of shot, indeed I am not even a beginner. I like this shot. I agree, though, that gain has a tendency to introduce noise. I don't know whether there is a similar control in Photoshop but in GIMP, you can simulate a longer exposure. I find it quite useful in my (albeit limited) deep sky and constellation shots.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • 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.