Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_banner_android_vs_ios_winners.thumb.jpg.803608cf7eedd5cfb31eedc3e3f357e9.jpg

Recommended Posts

Hello,

I have a question about filterwheels; SBIG filter wheels specifically. As far as I know they are the only ones that really use the 8 position filter wheels. So I have it loaded with L, R, G, B, Ha, OIII, and SII. So that is seven filters, what goes in the 8th slot???

Thank you for your insight,
Christopher

Share this post


Link to post
Share on other sites

There is a C filter, which is like the L but with (without?) the IR block (can't remember which way round they are).

Some people also have a special IR-pass filters for imaging the moon and planets. And some use a set of UBVIR filters for photometry.

There are also other less usual filters. I have a CH4 filter for (particularly) Jupiter & Saturn. I also have an NE3 filter for (particularly) planetary nebulae.

So that's another nine options ...  where can I get a 16-position filter wheel :biggrin:?

  • Haha 1

Share this post


Link to post
Share on other sites

If you've never felt the need for it forget it!

:Dlly

  • Like 1

Share this post


Link to post
Share on other sites

I could use an 8 position wheel for my Trius camera, for LRGB, [SII]. [NII], HII, [OIII]. Baader LRGB, plus a full set of 3nm Astrodons. As it is, I either have to lose the L filter, or else one of the NB, usually the [SI].

  • Thanks 1

Share this post


Link to post
Share on other sites

Just curious, having just started imaging with a DSLR, and having a long way to go before I'm ready for mono cameras and filters.

Would you need all 8 filters in one session, or do you just keep all your filters loaded and control which ones to use in a given session ?

Share this post


Link to post
Share on other sites

No, the most you'd need is R, G, B if you were going to cycle through them during the course of a session, any L data would be added separately The reason for loading up the wheel is to have all your filters in one place, and hopefully not gathering dust, something they can do with alarming ease.

A narrow band session would likely use only one filter at a time, to gather as much signal as possible.

  • Like 1

Share this post


Link to post
Share on other sites

Keep them loaded and use what you need.  Although it is not uncommon to use LRGB in rotation (LLLRGB LLLRGB,  etc).

Share this post


Link to post
Share on other sites

A dark filter would be handy if you are using the gear remotely and need a new set of darks.. :)

Share this post


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.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  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.


  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By wavydavy
      Canon 450D Modified for astrophotography, the IR cut filter has been removed for better response on red emission nebula in deep sky objects. Comes with battery, and charger. Shutter count is (atm) 5914, see picture 4. The camera is in great condition, throughout. No lens, just body. Will post special delivery. message me if you have any questions. Price is £150.





    • By Lachlan
      Hi everyone, 
      as the title suggests, I've noticed that the RA axis of my HEQ5 pro mount has some give. I don't notice it while the clutch is unlocked, but it's very obvious with a locked RA clutch. Any suggestions on what could be causing it/what adjustments need to be made? 
      Thanks 
    • By stardude07
      Hello,
      I am wanting (not really 😪) to sell my Stellarvue SV105-3SV with tube rings [not shown in pictures]. The telescope is in great condition with very little dust and no scratches. There is one very small ding in the dew shield paint but it is not dented and it is almost not even noticeable. It happened when I took the telescope out of the saddle and it lightly hit the saddle. The telescope has never been dropped or had any issues and is optically perfect with a strehl of .95 or higher (claimed by Stellarvue).
      I've only used this telescope for imaging however I've once or twice thrown an eyepiece in it during a star party or two and it's VERY crisp with no false color.
      Currently I live in Italy so that's where it can be picked up or shipped from. Price is negotiable however Stellarvue says it is worth around $1200-$1500 USD. The nice thing is you wouldn't have any VAT from Stellarvue . Please let me know if you have any questions, comments or are interested.
      Lastly, here is a link to some images that I've taken with it and what it looks like mounted up: https://www.astrobin.com/users/chriscorkill/
      SV105-3SV Specifications
      Aperture: 105mm Apochromatic Precision Triplet Focuser: 3" Dual Speed Focuser with 2" and 1.25" eye piece adapters F Ratio: f/7 Focal Length: 735mm Color Correction: Excellent Minimum Tube Length: 16" in travel mode Tube Diameter: ~ 4-1/8" (105mm) Dew Shield Diameter: ~ 5-3/8" (137mm) OTA Weight: ~12lbs (5.4kg) Retractable Dewshield: Yes


    • By stardude07
      Hey everyone!

      I'm new here and thought I would introduce myself. I'm Christopher, 30, from the United States and have been living in Europe for a few years. I mostly enjoy astrophotography when the weather permits. I hope to make a few new friends here and learn a lot about astrophotography. I have more gear than I should compared to how much I actually know about astrophotography but I am always willing to learn new tricks. I just got a new Stellarvue OTA, so I'm also new to middle range focal length. Can't wait to see what y'all have to offer on these forums
      Christopher

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.