Jump to content

sgl_imaging_challenge_2021_annual.thumb.jpg.3fc34f695a81b16210333189a3162ac7.jpg

Rchurt

New Members
  • Content Count

    2
  • Joined

  • Last visited

Posts posted by Rchurt

  1. Hello,

     

    I recently purchased my first telescope and camera, and now I want to make sure I have the correct Barlow or reducer to couple them together to achieve Nyquist sampling on the camera (or slight over-sampling). In case it’s important, I’m interested in planetary imaging—in theory that shouldn’t matter for this sampling question, but maybe there are other considerations to take into account.

     

    I used this calculator (https://astronomy.tools/calculators/ccd_suitability) and plugged in my info:

    Telescope: Celestron 8 SE

    Camera: ZWO ASI462MC

    Seeing: experimented with this one, but would like to get optics that allow for poor or very poor

    Binning: prefer 1x1 to preserve spatial resolution, but could consider higher if SNR is a problem

     

    I’ve seen on several forum posts that people often use a 2x Barlow to couple the two. However, according to this calculator, that will always lead to over-sampling. If anything, it says I should use no intermediate optics or even a reducer.

     

    So my questions are:

     

    Binning: Will I be able to see anything with 1x1 binning, or should I expect to need to bin to collect enough light?

     

    Is there some other consideration that’s more important here than achieving correct sampling? It seems like most others are over-sampling, and perhaps there’s a good reason for this. If so, is there another formula that would let me determine the appropriate optics to buy?

     

    Thanks in advance for any help!

×
×
  • 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.