So I see these nice filters on amazon, with crazy good filtration curve
Danger danger.
Or maybe not.
How about measuring these filters?
Here is my first test
https://youtu.be/Gs1ZhuaE7p4
I was surprised by the result, maybe there is another piece of data that describes a filter, apart from the filter curve.
The super high tech equipment is a fiber optic power meter and a heat lamp
https://www.amazon.com/gp/product/B07PM ... UTF8&psc=1
https://www.amazon.com/gp/product/B00IV ... UTF8&psc=1
Or cheap filters from China that are a fraction of a baader.$70 filter tester
- daslolo
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Re: $70 filter tester
I tested again but outdoors this time and the results are much closer to baader curve so there is something interesting happening here.
The same happens with an 850nm infrared flashlight.
https://youtu.be/kfSNER3mdBU
The same happens with an 850nm infrared flashlight.
https://youtu.be/kfSNER3mdBU
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Quark + Orion 120mm + beloptik
LX65 8" ACF
Quark + Orion 120mm + beloptik
LX65 8" ACF
- marktownley
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Re: $70 filter tester
What are you going to use the filter(s) for?
http://brierleyhillsolar.blogspot.co.uk/
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