new brand of erf filter?

[mami813]

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

[Dennis]

The page does not show the item. Do you have a image of the filter?

[mami813]

The page does not show the item. Do you have a image of the filter?

https://ko.aliexpress.com/item/32568041 ... 4itemAdapt

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[Dennis]

Thanks, well i think it doesnt block enough ir. Until 1100nm seems a bit short. Whats the price with cell?

[mami813]

Thanks, well i think it doesnt block enough ir. Until 1100nm seems a bit short. Whats the price with cell?

Hello, Dennis

Filter only $839
Cell Included $1049

[marktownley]

What sizes does it come in? For whatever reason my browser won't translate the web page.

[mami813]

What sizes does it come in? For whatever reason my browser won't translate the web page.

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.
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

[DavidP]

150mm appears to be the largest.

[marktownley]

Google translated it now...

[Dennis]

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.

[TareqPhoto]

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.

[mami813]

150mm appears to be the largest.

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.

[christian viladrich]

Very interesting. Thanks for sharing.