new brand of erf filter?
- mami813
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new brand of erf filter?
Is it a new brand of erf filter sold in Ali?
What do you think?
Collapse: <0.2mm
Effective range of light passing: 90%
Thickness (mm): 12mm
Surface shape: λ/4
Finish: 60-40
Center wavelength (nm): 656.28
Bandwidth (nm): 60
Peak transmittance (%): 95%
Cutoff range (nm): 200nm-1100nm
Cutoff Depth (OD): OD4
https://ko.aliexpress.com/item/10050043 ... pt=glo2kor
What do you think?
Collapse: <0.2mm
Effective range of light passing: 90%
Thickness (mm): 12mm
Surface shape: λ/4
Finish: 60-40
Center wavelength (nm): 656.28
Bandwidth (nm): 60
Peak transmittance (%): 95%
Cutoff range (nm): 200nm-1100nm
Cutoff Depth (OD): OD4
https://ko.aliexpress.com/item/10050043 ... pt=glo2kor
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Re: new brand of erf filter?
The page does not show the item. Do you have a image of the filter?
Triband C9.25
H-a: Quark Chromosphere with BF mod
WL: Antlia 500nm/ 3nm, 393 nm/ 3nm
Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo)
Player One Apollo Max + Mars MII
Barlows:
-2x Gerd Düring 2.7x
-2x TMB 1.8x
H-a: Quark Chromosphere with BF mod
WL: Antlia 500nm/ 3nm, 393 nm/ 3nm
Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo)
Player One Apollo Max + Mars MII
Barlows:
-2x Gerd Düring 2.7x
-2x TMB 1.8x
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Re: new brand of erf filter?
Thanks, well i think it doesnt block enough ir. Until 1100nm seems a bit short. Whats the price with cell?
Triband C9.25
H-a: Quark Chromosphere with BF mod
WL: Antlia 500nm/ 3nm, 393 nm/ 3nm
Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo)
Player One Apollo Max + Mars MII
Barlows:
-2x Gerd Düring 2.7x
-2x TMB 1.8x
H-a: Quark Chromosphere with BF mod
WL: Antlia 500nm/ 3nm, 393 nm/ 3nm
Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo)
Player One Apollo Max + Mars MII
Barlows:
-2x Gerd Düring 2.7x
-2x TMB 1.8x
- mami813
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- marktownley
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Re: new brand of erf filter?
What sizes does it come in? For whatever reason my browser won't translate the web page.
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
- mami813
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Re: new brand of erf filter?
It seems that Ali's homepage is written only in the language of the access country. I want to access the English page, but it doesn't work.marktownley wrote: ↑Tue Jul 19, 2022 2:41 pm What sizes does it come in? For whatever reason my browser won't translate the web page.
Try uploading the Change link again. If it doesn't come out in English, I don't know how to do it either.
https://www.aliexpress.com/item/1005004 ... 96035%21im
- marktownley
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Re: new brand of erf filter?
Google translated it now...
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
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Re: new brand of erf filter?
So pricewise it would not be so far away from the Baader ones, which i would prefer in this aperture area. Because they block until 1400nm, so you dont need an additional erf.
Triband C9.25
H-a: Quark Chromosphere with BF mod
WL: Antlia 500nm/ 3nm, 393 nm/ 3nm
Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo)
Player One Apollo Max + Mars MII
Barlows:
-2x Gerd Düring 2.7x
-2x TMB 1.8x
H-a: Quark Chromosphere with BF mod
WL: Antlia 500nm/ 3nm, 393 nm/ 3nm
Ca-K: homebrew (includes 2x 1.5A filters, thanks Apollo)
Player One Apollo Max + Mars MII
Barlows:
-2x Gerd Düring 2.7x
-2x TMB 1.8x
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Re: new brand of erf filter?
I saw those also while ago but didn't want to ask about it, kind of cheaper than Baader to me, and i can go with the largest size which is 150mm anyway and it will be ok to all my scopes from 150mm and smaller refractors maybe down to 100mm.
I see more products by China that i keep questioning about the quality, i don't want to risk with the sun itself, i can risk with the moon or stars by night, but the sun is different story.
I see more products by China that i keep questioning about the quality, i don't want to risk with the sun itself, i can risk with the moon or stars by night, but the sun is different story.
- mami813
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Re: new brand of erf filter?
The filter size is sold up to 200mm.It's $1199.
It's cheap, but the ability to reduce heat energy is a bit disappointing. It can be up to 1400 nm, but the seller offers an additional price.
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Re: new brand of erf filter?
Very interesting. Thanks for sharing.
Christian Viladrich
Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
http://www.astronomiesolaire.com/
Co-author of "Planetary Astronomy"
http://planetary-astronomy.com/
Editor of "Solar Astronomy"
http://www.astronomiesolaire.com/