ZWO narrowband filter.

Focusers, Filters, Barlows etc..

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Re: ZWO narrowband filter.

Postby AL Bates » Tue Mar 07, 2017 2:14 am

dydan wrote:
Sam wrote:the actual filter area is 28mm only
so metal part should not cause this problem

it looks very strange especially the right up corner


Before
before.PNG


After
after.PNG



I don't like to recommend ZWO filter


Dydan, Nice job cutting the mask rings... wish I had some.
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Re: ZWO narrowband filter.

Postby Sam » Mon Mar 13, 2017 10:01 am

we will paint the outside to black in the future
thanks for your suggtion
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Re: ZWO narrowband filter.

Postby MoonPrince » Mon Mar 13, 2017 2:44 pm

This is very important found for us, Thanks all ! we will do our best to fix this problem.
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Re: ZWO narrowband filter.

Postby AL Bates » Mon Mar 13, 2017 6:23 pm

MoonPrince wrote:This is very important found for us, Thanks all ! we will do our best to fix this problem.

That would be great, Thanks Sam & Moonprince for the rapid reply and for the quick fix.

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Re: ZWO narrowband filter.

Postby Marke » Sun Apr 16, 2017 2:11 pm

I am having the same problem , very frustrating has anyone tried a black marker yet ?
I dont want to have replace them.
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Re: ZWO narrowband filter.

Postby kcobby » Fri May 12, 2017 11:01 am

I use a full set o ZWO Narrowband and have never experienced the problems defined in this thread. I capture really nice Flats at ADU 16,000 +/- 500. Maybe the thread examples were over exposing exposure. Would be useful to see the histogram.
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Re: ZWO narrowband filter.

Postby starmanmike1 » Tue Dec 05, 2017 5:38 am

dydan wrote:
Sam wrote:the actual filter area is 28mm only
so metal part should not cause this problem

it looks very strange especially the right up corner


AL Bates's opinion was right.

I fixed the problem by masking the border.

Thank you AL Bates

It is certain that there is a design problem of the ZWO filter.

1.jpg


2.jpg


3.jpg


I’m looking to create a similar ring for my 36mm filters. What are your recommendations for the inner and outer dimensions?

Thanks
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Re: ZWO narrowband filter.

Postby starmanmike1 » Wed Dec 06, 2017 2:21 am

I’m looking to create a similar ring for my 36mm filters. Any idea what the recommended inner and outer dimensions would be?

Thanks
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