Support Astromart! | Log In | Help
Astronomy NewsTelescope ClassifiedsTelescope AuctionsTelescope Articles & ArticlesTelescope Articles & ReviewsTelescope and Astronomy ForumsAstronomy Events Calendar

View Forums
Start A New Thread
Display Preferences
Search Forums

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

979 most users online in the last day
616 new forum posts in the last month
More site stats...

Home > Forums > VENDORS > Astro-Physics > Message #657349

Cleaning a dirty lens (was how reflective)

Posted by Roland Christen on 4/10/2009 2:51 PM   (3837 hits)
 Prev Post Next Post 

Hi all,

Getting ready for NEAF, I pulled out my 130EDF refractor and had a look at the lens (Serial #01). I lent this scope to my friend Mark last summer, who took it to a number of star parties (Chiefland in Florida, Black Forest, Nebraska, etc). He told me that dew was heavy at all these events, and he did not have any kind of dew heater to prevent the inevitable moisture from settling on the optics. I didn't want to bring this lens to NEAF in the condition that it was in, so cleaning was in order. I am taking this opportunity to show you all how it is done.

First pix shows the lens in cell with retaining ring removed, the way it was returned to me last year (I have not had time to clean it since). Looks pretty bad, yes? In fact, the contrast was noticeably poorer than it should be for this optic. Lots of stray light surrounding a bright target image.

Rolando

Photo Attached (352KB) - Click to view

Thread:

Subject Posted By Date/Time Hits 
Cleaning a dirty lens (was how reflective) Roland Christen 4/10/2009 2:51 PM 3837
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/10/2009 2:55 PM 2352
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/10/2009 3:04 PM 1980
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/10/2009 3:13 PM 2185
Re: Cleaning a dirty lens (was how reflective) Luke Leege 4/10/2009 9:20 PM 1161
Re: Cleaning a dirty lens (was how reflective) Jeff Blazey 4/11/2009 7:42 AM 1005
Re: Cleaning a dirty lens (was how reflective) Luke Leege 4/11/2009 2:19 PM 859
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/11/2009 7:48 AM 1213
Re: Cleaning a dirty lens (was how reflective) Greg Nowell 4/14/2009 1:40 PM 832
Re: Cleaning a dirty lens (was how reflective) Luke Leege 4/14/2009 7:51 PM 757
Re: Cleaning a dirty lens (was how reflective) Dave Barta 4/10/2009 5:46 PM 1031
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/11/2009 7:48 AM 1085
Re: Cleaning a dirty lens (was how reflective) Enrico Africa 4/10/2009 8:43 PM 818
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/11/2009 7:46 AM 1041
Re: Cleaning a dirty lens (was how reflective) Ivan Ong 4/11/2009 8:21 AM 767
Re: Cleaning a dirty lens (was how reflective) Enrico Africa 4/11/2009 11:24 AM 731
Re: Cleaning a dirty lens (was how reflective) dan kowall 4/11/2009 8:38 AM 803
Re: Cleaning a dirty lens (was how reflective) Rex Cox 4/14/2009 9:04 AM 666
Re: Cleaning a dirty lens (was how reflective) Luis Saravia Jr 4/15/2009 8:45 AM 711
Re: Cleaning a dirty lens (was how reflective) Roland Christen 5/9/2009 11:06 AM 837

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