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Untuned
Joined: 03 Dec 2011
Posts: 93
Location: Pooler, GA
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| Posted: Mon Mar 25, 2013 12:07 pm Post subject: Snow flakes in my lenses? |
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I have a NEC 6PG Xtra with the HD144 or 145 colored lenses, and all three of them have what look like snow flakes in them. What is that? Why are they there and can I get rid of them?
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Mon Mar 25, 2013 12:10 pm Post subject: |
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Post a pic, and they are either 144s or 145s, they wont be both. Itll say on them.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Mon Mar 25, 2013 6:34 pm Post subject: Re: Snow flakes in my lenses? |
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| Untuned wrote: | | I have a NEC 6PG Xtra with the HD144 or 145 colored lenses, and all three of them have what look like snow flakes in them. What is that? Why are they there and can I get rid of them? |
Dust 
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Hulio
Joined: 15 Apr 2006
Posts: 494
Location: Belgium
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| Posted: Mon Mar 25, 2013 9:13 pm Post subject: |
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Is this what it looks like ?
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Untuned
Joined: 03 Dec 2011
Posts: 93
Location: Pooler, GA
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| Posted: Tue Mar 26, 2013 2:55 am Post subject: |
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I'm not sure I was able to capture this well. You can see a crystalline at 10 o'clock, and a smaller one at 1 o'clock with a smattering of other ones. With the pj on, it looks like there is a ton of dust particles also.
The lenses are HD-144.
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Tue Mar 26, 2013 3:06 am Post subject: |
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Google image search for 'lens fungus' and see if some of those images don't look exactly like yours. At some point, your HD-144's were probably in a dusty environment, then probably in a damp environment (basement, warehouse, etc.). The spores grew and voila! Fungus.
SC
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garyfritz
Joined: 08 Apr 2006
Posts: 12088
Location: Fort Collins, CO
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| Posted: Tue Mar 26, 2013 3:54 am Post subject: |
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The heck you say. I thought "fungus" was just something (not really fungus) that formed in the glycol. I didn't realize you could actually get a fungus growing in the lenses.
If those "snowflakes" are actually on the lens, especially the front lens, there's a good chance they won't have any noticeable effect on the image. It's far from the focal plane of the lenses so obstructions there don't focus sharply on the screen. You can stick fingers in front of the lens and just darken the image a bit.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Mar 26, 2013 4:08 am Post subject: |
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Fungus grows on pretty much anything. Replace the lenses with color filtered HD-144 lenses if you decide to do so. Seems like there were a couple of sets available here in the for sale section recently...
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Mar 26, 2013 9:25 am Post subject: |
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| Tom.W wrote: | | Fungus grows on pretty much anything. Replace the lenses with color filtered HD-144 lenses if you decide to do so. Seems like there were a couple of sets available here in the for sale section recently... |
Its an NEC... They came that way!!
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Untuned
Joined: 03 Dec 2011
Posts: 93
Location: Pooler, GA
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| Posted: Tue Mar 26, 2013 11:54 am Post subject: |
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I thought they were the color-filtered lenses?!?
Can't the lenses be separated and cleaned? Is it worth the effort?
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Mar 26, 2013 1:39 pm Post subject: |
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They are, they can, and not really.
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Spanky Ham
Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central
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| Posted: Tue Mar 26, 2013 1:40 pm Post subject: |
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The front element can be removed pretty easily. This is the part that moves for corner focus. That will allow you to clean the front and back of the outermost lens and the front of the second lens. Going further is quite involved and not recommended. I think CZEddie had a pictorial on taking apart a lens and it was an adventure.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Mar 26, 2013 2:36 pm Post subject: |
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Is the fungus on all three lenses ?
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Untuned
Joined: 03 Dec 2011
Posts: 93
Location: Pooler, GA
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| Posted: Tue Mar 26, 2013 4:23 pm Post subject: |
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| Tom.W wrote: | | Is the fungus on all three lenses ? |
Yes
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Mar 26, 2013 5:18 pm Post subject: |
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Buy used lenses from Curt, if he has any, or find a seller here or elsewhere or live with it. You can pretty much forget about cleaning the lenses...JMO
http://herron.50megs.com/fungus.htm
I have a spare new set of two unfiltered and one Red filtered HD-144 lenses if you need them send me a PM.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Mar 26, 2013 11:49 pm Post subject: |
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I cant see the point in replacing them myself, id be amazed if youll ever see the difference.
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