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:


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

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

Home > Classifieds > Astromart Classifieds > Filters > Classified #294511

For Sale: Sirius Optics Variable Filter System [SOLD]

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

Variable Filter System (VFS) with a 1.25" barrel size and carrying case. Frankly, I found this filter isn't very useful in my apo refractor or premium newt (which already have great low-contrast detail) and requires a barlow for focus since it requires additional in-travel in your focuser.

The glowing review on the Sirius Optics site was for a large achromatic refractor. Indeed, I tried this filter on a 9" achromatic refractor at a local observatory and it was a marked improvement with lots of detail displayed for Jupiter that was not seen without it. I suppose this filter works best as a minus-violet filter on steroids for achromats.

The filter focuses without a barlow in most SCTs.

$140 shipped insured via FedEx ground to CONUS. Money order, bank check, or PayPal accepted.

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