⚠️ ⚠️ Chroma 1.25” filter cell thermal fracture

Frankenscope? Let's see it!***be advised that NOTHING in this forum has been safety tested and you are reading and using these posts at your own peril. blah, blah, blah... dont mess around with your eyesight when it comes to solar astronomy. Use appropriate filtration at all times...
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MalVeauX
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Re: ⚠️ ⚠️ Chroma 1.25” filter cell thermal fracture

Post by MalVeauX » Thu Oct 04, 2018 9:52 am

Sorry to hear about that, that sucks...

Was this with an ERF in front of it?

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Re: ⚠️ ⚠️ Chroma 1.25” filter cell thermal fracture

Post by krakatoa1883 » Thu Oct 04, 2018 12:57 pm

Sorry to know this, Apollo. Yes, most probably it's the same that occurred to my red filter.
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Re: ⚠️ ⚠️ Chroma 1.25” filter cell thermal fracture

Post by marktownley » Thu Oct 04, 2018 5:13 pm

Ouch!
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Re: ⚠️ ⚠️ Chroma 1.25” filter cell thermal fracture

Post by christian viladrich » Thu Oct 04, 2018 6:19 pm

What were the indoor and outdoor temperatures ?
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Re: ⚠️ ⚠️ Chroma 1.25” filter cell thermal fracture

Post by MalVeauX » Thu Oct 04, 2018 8:25 pm

Ahh, I understand now, still, you'd think any filter made for solar use would be fit in a loose fashion for filter cell holding.

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Re: ⚠️ ⚠️ Chroma 1.25” filter cell thermal fracture

Post by Bob Yoesle » Fri Oct 05, 2018 6:30 pm

Thanks for the heads up Apollo.

I checked my filter and it uses a plastic retaining ring. I loosened it up when I got it and there is a slight rattle to it when gently shaken, so hopefully I'll have no issues. It is a hard coated filter on a fused silica substrate so it should be quite stable thermally, so any expansion/contraction issues would have to be the cell's.
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