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

2135 most users online in the last day
923 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   (5000 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 5000
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/10/2009 2:55 PM 2839
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/10/2009 3:04 PM 2427
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/10/2009 3:13 PM 2643
Re: Cleaning a dirty lens (was how reflective) Luke Leege 4/10/2009 9:20 PM 1417
Re: Cleaning a dirty lens (was how reflective) Jeff Blazey 4/11/2009 7:42 AM 1193
Re: Cleaning a dirty lens (was how reflective) Luke Leege 4/11/2009 2:19 PM 1025
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/11/2009 7:48 AM 1473
Re: Cleaning a dirty lens (was how reflective) Greg Nowell 4/14/2009 1:40 PM 981
Re: Cleaning a dirty lens (was how reflective) Luke Leege 4/14/2009 7:51 PM 869
Re: Cleaning a dirty lens (was how reflective) Dave Barta 4/10/2009 5:46 PM 1230
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/11/2009 7:48 AM 1263
Re: Cleaning a dirty lens (was how reflective) Enrico Africa 4/10/2009 8:43 PM 940
Re: Cleaning a dirty lens (was how reflective) Roland Christen 4/11/2009 7:46 AM 1200
Re: Cleaning a dirty lens (was how reflective) Ivan Ong 4/11/2009 8:21 AM 886
Re: Cleaning a dirty lens (was how reflective) Enrico Africa 4/11/2009 11:24 AM 842
Re: Cleaning a dirty lens (was how reflective) dan kowall 4/11/2009 8:38 AM 912
Re: Cleaning a dirty lens (was how reflective) Rex Cox 4/14/2009 9:04 AM 770
Re: Cleaning a dirty lens (was how reflective) Luis Saravia Jr 4/15/2009 8:45 AM 823
Re: Cleaning a dirty lens (was how reflective) Roland Christen 5/9/2009 11:06 AM 983

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