Support Astromart! | Log In | Help
Astronomy NewsTelescope ClassifiedsTelescope AuctionsTelescope Articles & ArticlesTelescope Articles & ReviewsTelescope and Astronomy ForumsAstronomy Events Calendar
View Categories
Browse By Location
Place A New Ad
Display Preferences
Search Classifieds

User Name:

Password:

Save Login
 
New to Astromart?
Register an account...

Terms of Service
Privacy Policy
Help & FAQ
Astronomy Links
User Profiles
Top Users List
Sponsors
Supporters
RSS Feeds

Home > Classifieds > Astromart Classifieds > Telescope Making > Classified #193509

For Sale: 125mm f15 achromat objective and 3" zerodur flat

Please Log In to view the details for this classified ad.
Don't have an Astromart account? Click here to create one

I'm crazy, but I would like to try an off axis newt project.

Thus I need to sell my excellent 125mm f15 achromat objective. Made by a master optician for his own personal use. The documentation with it says it is 0.08 peak to valley wave error and 0.014 RMS. It does not have coatings (the images are very slightly dimmer than a coated 125mm would be). The housing is a solid aluminum case with three holes for mounting (no collimation mechanism).

The 3" zerodur flat is from Oriel Optical and is rated at 1/20 PV. I have painted the outer uncoated beveled edge to reduce stray reflections.

I would like to sell these together to someone seeking to do a folded refractor project. These together produce excellent images--very sharp and contrasty. I've seen the companion to Propus in Gemini with this scope! Yes, there is a little color on Jupiter but it is very subtle; there is a slight color cast on very bright stars like Castor (very slight yellow green in focus). Defraction rings same one either side of focus (with color of course). "False color" is nothing compared to faster achromats I've looked through. The previous owner of the objective (highly rated Astromart seller) compared it quite favorably with a 6" f20 D&G objective he owned. Very flat field of view with this scope!

I have a firm price of $900 plus shipping for both optics ($500 for the objective and $400 for the flat). If can not sell at these prices, I will hold on to it...

Sorry, no digital picture capability.

Thanks for looking.
 

Back to Listing

All times are in (GMT-8:00) Pacific Standard Time Zone  
Astronomy News | Telecope Classifieds | Telescope Auctions | Telescope Reviews | Telescopes | Telescope and Astronomy Forums | My Account | Help | RSS