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 #198639

For Sale: V-Block Filter 1 1/4" Removes Violet Fringe (SOLD!)

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

(SOLD!) V-Block Filter 1 1/4" Removes Violet Fringe from Refractors without reducing image brightness. Improves picture and focus. Used 3 times. (Selling my refractor, so must sell this filter.) Original box and filter case included.

$55, includes 2-3 shipping CONUS.
PayPal preferred. Money Order acceptable. No personal checks.

Improves the Clarity of Bright Objects in Refractors
With refractors, it's normal to see some purple fringing or halos around bright objects such as the planets, Moon, and bright stars. Such false color, or chromatic aberration, results from the inability of a standard two-element ("achromatic") lens assembly to focus all wavelengths of light to a single point. The effect is particularly pronounced at higher powers. The V-Block removes this color, while improving the normal color, and focus.


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