Maier ITF - first failure?!
- Merlin66
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Maier ITF - first failure?!
I, like many others, have replace failed Coronado ITF filters with the Maier ITF.
Over the years I've been very happy and impressed by the Maier performance.
Well, this morning I was presented with my first Maier failure......
The central 40% is "burnt out" - not easily visible from the bright front surface but very noticeable when inspecting the rear of the filter.....
(This is a "H-alpha ITF Blocker -ITF0143# 1")
Has anyone else experienced failure of these ITF???????
Over the years I've been very happy and impressed by the Maier performance.
Well, this morning I was presented with my first Maier failure......
The central 40% is "burnt out" - not easily visible from the bright front surface but very noticeable when inspecting the rear of the filter.....
(This is a "H-alpha ITF Blocker -ITF0143# 1")
Has anyone else experienced failure of these ITF???????
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Re: Maier ITF - first failure?!
A couple of quick images.
First the rear surface against a bright background..... The front surface....difficult to see the failure.
First the rear surface against a bright background..... The front surface....difficult to see the failure.
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Re: Maier ITF - first failure?!
Looks like the Beloptik might be a better option, hard coatings on KG3 and RG630, cost a bit more, and the whole filter diameter is utilised, you don't need the O ring.
- Merlin66
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Re: Maier ITF - first failure?!
My money would be on a Baader 35nm Ha CCD filter at the front of the blocking filter diagonal.
(No O ring was used in this fitment.....)
(No O ring was used in this fitment.....)
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Re: Maier ITF - first failure?!
I tried the Maier originally, but replaced it with the Beloptik ITF for one BF and a Baader 35nm plus a Beloptik KG3 with IR/UV cut for the other.
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Re: Maier ITF - first failure?!
You don't need any secondary filters with the Baader.....it gives good cut-off as is.
(I've used the UV/IR KG3 filter on it's own as an ITF......OK but I prefer the Baader solution.)
Just interested... why did you replace the Maier ITF??
(I've used the UV/IR KG3 filter on it's own as an ITF......OK but I prefer the Baader solution.)
Just interested... why did you replace the Maier ITF??
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Re: Maier ITF - first failure?!
I use my Coronado BF's with my Lunt scopes. The Maier filter had too much background glow, plus the O ring wouldn't fit which left an exposed bit of filter around the circumfrence. In comparison, the Beloptik filter image looked a lot cleaner without too much glow. Interesting about the Baader, I remember seeing a thread on here regarding the Baader not being sufficient as a stand alone ITF for visual. I know with the Lunt ERF which is RG610 that I can use the KG3 without the Baader.
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Re: Maier ITF - first failure?!
I guess laminated filters are always going to fail sadly
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- Merlin66
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Re: Maier ITF - first failure?!
Gus,
I don't believe there are any safety issues using the Baader 35nm filter as an ITF.
I use the the "big brother" D-ERF version on my PST Mod.......
I don't believe there are any safety issues using the Baader 35nm filter as an ITF.
I use the the "big brother" D-ERF version on my PST Mod.......
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Re: Maier ITF - first failure?!
According to my experience the KG3 is essential. 35nm Baader alone as an ITF is not enough.
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Re: Maier ITF - first failure?!
Valery,
What exactly have you found that the KG3 gives that the Baader doesn't?
As tested with the spectrograph, there should be no issue.
What exactly have you found that the KG3 gives that the Baader doesn't?
As tested with the spectrograph, there should be no issue.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
Re: Maier ITF - first failure?!
Both of my Maiers filters are still perfectly clear and my two are the first two he made.
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