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_celestial_motion.thumb.jpg.a9e9349c45f96ed7928eb32f1baf76ed.jpg

Sign in to follow this  
Nikolas74

COMPLETED - SOLD Altair Lightwave 0.8x Reducer

Recommended Posts

The Lightwave 0.8x focal reducer gives an 0.8x reduction in F-Ratio for faster exposure times, as well as a correspondingly wider field for astro-photography. Designed primarily for refractor telescopes of F6 or longer focal ratios, however also known to work with RC telescopes.

- Reduces and flattens phtographic field.
- 38mm Clear aperture
- Integral T-Ring adapter thread.
- Requires back-focus of 55mm to CCD Chip.
- For DSLRs a standard T-Thread adapter of approx. 10mm thickness is required.
- The standard 2" OD barrel will fit any 2" format telescope like an eyepiece.
- The base of the 2" OD barrel is threaded for 2" filters.
- CNC machined body with gloss black anodized finish.
- Includes a CNC machined T-threaded end-cap to protect against dust on the rear lens element which is more exposed than the front element. A plastic dust cap is included for the 2" OD front barrel.

Price £90

Paypal byuer pays the fees

Postage expenses are on me

Shipping from Athens Greece

Thank you, 

Nikolas.

A.jpg

B.jpg

C.jpg

Edited by Nikolas74
SOLD

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By Viktorious
      Time for yet another cry for help when it comes to choosing diagonal. I have read the many similar threads and gathered some knowledge (too many to start linking). I have come some way in my process and now that it is coming to final decisions I would like to hear from the experts. Not many of threads I have read end with the OP returning to deliver some review/verdict of his/her final decision. While I wait for response on some thread where I asked about the result, the eagerness in me forces me to write my own thread. Perhaps some of the people asking these questions before can now answer in my thread as experts!

      I have the Nexstar Evolution 9.25 and am currently using the stock diagonal. My eyepieces are the Baader 8-24 mm zoom and the stock 40 mm Plössl. I would also like to upgrade EPs and there I'm looking at something better in 24 mm range, as well some nice low power for more FOV. I'm following threads about EPs and SCTs with great interest for this (on CN). Can say that I'm currently leaning towards the 1.25" 24 mm ES 68° and 2" 36 mm Hyperion aspheric (if going 2" route).

      I'm thinking 2 alternatives (including a budget alternative for one of them). I'm looking at Baader mainly for ClickLock (and expect good optics):
      Baader T2 Zeiss prism with a 1.25" ClickLock EP (T2 part #08) -OR- the 2" prism with 2" ClickLock (splurging that is). The budget alternative would be to get the non-Zeiss T2 prism instead for the 1.25". Worth noting that I would like to get the Celestron f/6.3 Reducer/Corrector. This would be for future purposes of delving into EAA but of course I would use it visually as well (especially if choosing the T2 route). The reasoning for my alternatives:
      Go for the 2" Zeiss prism to theoretically get the best of the best in visual terms. I would make better use of the 46 mm baffle tube opening. Theoretically possible to combine with the R/C thanks to relative short light path (although not necessarily needed with 2" EPs). Downside of going to 2" accessories would be the cost, EPs, filters etc., on top of diagonal. Would not be able to spend all these costs at once. Cheaper route with T2 prism (especially the non-Zeiss), not only diagonal but also the other accessories. Cost of the R/C would be comparable to e.g. the 36 mm aspheric and give similar power and FOV with the 24 mm ES, i.e. the 24 mm would act as both. Extra plus is the ClickLock clamp for 1.25" with built in fine focusing not involving the mirror. Downside of knowing that not all light coming out of baffle tube is used. To get the wide FOV (24 mm + R/C) I'm adding glass to the optical train (theoretically not a good thing). I'm leaning towards the T2 as it would be a cheaper diagonal and for EPs I would only need the 24 mm and then the reducer instead of a 30-40 mm, so saving the expense of one EP. Then I would already have the reducer for continuing into EAA. The questions I hope the experts here can help with:
      The old reducer vs 2" diagonal question. With R/C and the 24 mm I can get roughly the same mag and FOV as e.g. the 36 mm Hyperion (technically 38 mm vs 36 mm and 68° vs 72°). Also reading good things about the ES 68° and with R/C the EP should behave the same. Am I missing something here? The logics say that the I would lose some contrast with the R/C (not using full opening + adding elements), correct? Possibly flatter fields though (not important now, hopefully the EP threads might tell soon enough). The Zeiss vs non-Zeiss T2? Big differences? I have read a few posts on this so most to get some updated views here (have read that Baader has changed some things over the years). Using the R/C (f/6.3) with these prisms. I know f/7 is mentioned as "the limit" but also remember BillP's test where he was happy down to f/6 with the prisms (in 2014 at least). Perhaps most important: have I missed some other obvious alternative here? Maybe I have forgotten some question here but perhaps for the best as I assume those who have gotten this far are tired of reading now. Thanks for getting here though!

      Thanks,
      Viktor
    • By masjstovel
      Hi,
      I bought my first telescope, SW 150pds about 6 months ago with the purpose of astroimaging "when i feel ready".  So far ive used my Nikon D810 for that, and I'm now  planning on taking the step buying my first AP camera.
      My targets would be DSO's, and not planetary. I want a mono-camera, not color. 

      I want to get away with a very good camera to a reasonable price (wouldn't we all...) and in this regard I've been drooling on the ZWO ASI 1600MM Mono for some time. The price for it is in the upper part of my budget, but I'm willing to if its worth it.  I've seen from other treads that sensor-size isn't everything, and dynamic range and gain and all is just as important, but i have trouble understanding it all 100% when it's all new to me, but in my experience i am a practical person who learns things much better and faster with the gear in my hand. So without getting to technical, and staying as objective as possible - please help me with; 

      1. Is this a good camera to go for?
      2. It's sold with options of filters 1.25", 31mm or 36mm - Why these options, and what determines what i would choose?

      3. Would you go for another camera in this price range, and why? - Or to rephrase it a bit; If you were in my shoes, which camera would you og for?

      I'd appreciate any help:)

      I might add, that i understand that with my lack of experience, buying a mono-camera with filters and all might seem premature, but for some strange reason. I enjoy these "way over my head"-projects and figuring  out things as time goes - I just need some guiding in the right direction. 
    • By FileraBe
      Hi,
      sorry if this was already posted, i'm looking for a flattener/reducer for my William Optics Zenithstar 66 SD (already asked WO by email) they reply me that since this product is discontinued over 10 years ago, i need to look for 
      FlatII, FlatIII - with 2"sct thread
      Flat6a with 2"SCT adapter
      and i saw this one https://www.firstlightoptics.com/reducersflatteners/william-optics-adjustable-flat6a-iii-08x-reducer-flattener.html
      and this one https://www.aliexpress.com/item/32917167365.html but i'm not very sure, so i'll ask before buying anything
      i will use it on my recently buyed star adventurer classic (buyed on FLO)

      Thanks in advance
    • By Stardweller
      Hello,
      I own a Vixen ED-80 refractor which is used with a custom focuser by Telescope Service.
      (pictured below)
      A Celestron f/6 SCT reducer corrector did not provide decent images either because it is not appropriate or because I did not maintain the correct distance. 
      I am thinking of buying the Sky-Watcher .85x Reducer/Flattener instead, as it is made for similar ED80 telescopes. 
      I do not know what is the correct distance of the SkyWatcher reducer for my setup and more important, I do not know if it will focus with the custom TS focuser.
      Do you have any similar setup that you have used successfully?
      Clear Skies!
      Paul

    • By paulobao
      Hello all,
      I'm selling the original Takahashi TKA31580S Reducer/Flattener for TSA 102/TSA120/FS102/28/TOA130/150.
      Condition: Pristine, as NEW (and it was never cleaned, just blown)
      Reason to sell: I don't make astrophotography anymore!

      You can visit my ASTROBIN page (https://www.astrobin.com/users/paulobao/)

      or find me here .
       
      Price: 350 Euro.


       



×
×
  • Create New...

Important Information

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