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rosenbush
Joined: 14 May 2010
Posts: 94
Location: Brownsville Texas
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| Posted: Tue Jan 03, 2012 2:37 am Post subject: AR Coating gone, now what? |
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After I checked a CRT I'm trying to put it back on use, one of the lenses on it has the AR coating damage, looks like the previous owner clean it with something and the coating of one of the lenses is gone (CRT side), the second one is not so bad, an the 3d one is good. After I looked on the web, there is a lot of information how to take care of the coating, but there is not much information about what are the options after the damage is done. I checked and there is re-coating services, just you need to send the lenses and the wavelenght that you need (I think is 1400-1600 nm is the one to crt's) but , the question: Does it really worth the effort to remove the damage part form the lenses, (doesn't look easy by the way, as I never tryed before), send them to the lab and the re-install them on the lenses again, or, just learn to live with that and put the worst on the blue tube and forget about it?
Any feed back will be highly appreciated.
They are 10F's
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Jan 03, 2012 6:14 am Post subject: |
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I personally doubt you would see much difference on Blue and as I remember the c element has its own anti reflective coating.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Tue Jan 03, 2012 6:20 am Post subject: |
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i find it hard to believe that that doesn`t mean the lens doesn`t need the coating.
_________________
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Jan 03, 2012 6:25 am Post subject: |
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Well I guess the best test is to try it 
Your only missing the coating on one half of one lens element....
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Jan 03, 2012 6:41 am Post subject: |
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| dvh99 wrote: | | i find it hard to believe that that doesn`t mean the lens doesn`t need the coating. |
Yes they are coated for a good reason but I have used several uncoated lenses on my view cameras that look excellent even in high flare situations !
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Spanky Ham
Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central
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| Posted: Tue Jan 03, 2012 3:02 pm Post subject: |
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It would be an interesting experiment to see exactly how much of an effect this has on ANSI cr. As Tom said, I didn't notice a huge difference on my PG9 that had the coating removed on one lens. AC CRTs have poor ANSI to begin with, so it may have more of an effect on LC CRTs.
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