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CZ Eddie
Joined: 23 Mar 2006
Posts: 1601
Location: Austin, TX
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| Posted: Sun Jul 04, 2010 5:22 am Post subject: HD-145 lens teardown? |
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I got my HD145 with the red/blue lense today. They look great, but I'd like to clean them up a bit. It almost looks like the inner elements might be a bit dirty? I've never seen that with HD-8 or any of the HD10 series I've had (which is all but the 10E afaik).
I read somewhere that these can be torn down easily? Has anyone here done it and do you have any tips or stories of "gotchas"?
These will be used on a 92" wide 4:3 high power screen for computer/multimedia.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Sun Jul 04, 2010 5:32 am Post subject: |
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I would NOT recommend it. Plus you need a large spanner wrench.
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CZ Eddie
Joined: 23 Mar 2006
Posts: 1601
Location: Austin, TX
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| Posted: Sun Jul 04, 2010 6:15 am Post subject: |
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Okay, if it needs a spanner wrench, then I don't want to mess with it. I had to deal with that when I tore down some HD120's that had an inner element fall off. Frack, that was a pain!
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Mon Jul 05, 2010 12:10 am Post subject: |
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Don't do it.
Any dust within the lens is in a area soooo far out of focus that you'll never see it. You'll more likely to do more damage than good.
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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zGman
Joined: 22 May 2006
Posts: 599
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| Posted: Mon Jul 05, 2010 3:55 am Post subject: |
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Pretty easy to remove the outer barrel and do some light cleaning,
this is where most of the dust has been in my experience. Bad idea
to disassemble the main body, as others have noted....
G
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Mon Jul 05, 2010 5:31 am Post subject: |
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Don't even think about it unless you have at least a Class 100 clean room and all the RIGHT tools for disassembly of that lens, and a bunny suit and lots of optical cleaning products.
Dust out of the focal plane won't be seen but if there's enough of it it will start to mess with the contrast ratio. But that'd take a LOT of dust.
CJ
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