You summoned me? Looks like a good filter, maybe I should buy a sample and measure it! Main worry was the relatively poor off band blocking of OD > 4, but looking at the chart it isnt actually that bad!
Thanks for stopping by, Cuiv! Yes, the filter seems to perform good for its price. If you decide to get and measure it, I’d love to see your results! It looks like they only sell "golden" version now. I haven't tested mine yet. Perhaps next week we'll have some nice conditions. Clear skies!
Can you tell me where in image train sv220 and scorpio filters were installed? I heard installing sv220 as far away from camera as possible reduces star halos.
Good point. The Scorpio filter is installed in the filter wheel that is screwed to the camera body, while SV220 was a few millimetres further from the sensor if I remember correctly. I used a filter drawer back in that time.
It’s a shame that you focused on the halos and not so much on the data quality between the two, I would love to see the nebulae details to compare him much data I’m losing with my 7nm SVBONY. But thank you for the video anyway. Maybe do another complimentary video focusing on the data quantity itself. The faint details you can get that the 7nm can’t resolve well
Thanks for the feedback! I’ll focus on details when looking at the updated version of this filter that (as I understand it) will be selling instead of the original version.
Halos come from insufficient absorption of light outside the bands of interest. This comes from using fewer optical layers, making the manufacturing cheaper. The filters that do not have halos have an OD better than 4.
Thanks for the insight! That makes a lot of sense-off-band light leakage due to fewer optical layers would explain halos in cheaper filters. I'm looking forward to the performance of the "golden" version of this filter.
@@LittleLightCamera Silicon has a band gap of 1.12 eV. According to the Planck's energy equation, this corresponds to the wavelength 1240/1.12 = 1107 (nm). Silicon does not absorb light at a wavelength higher than that. That's the upper limit of sensitivity of silicon photodetectors.
@nikaxstrophotography you have already failed, thinking Communist Chinese is the only option because they have destroyed all your buying choices through predatory subsidies. My phone is a Samsung S10 built in KOREA and assembled in VIETNAM.
@@anandarochisha Mate I don't give a flying F**k about politics. I look at what's good for my pocket. Take it elsewhere this is not a political channel.
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
You summoned me?
Looks like a good filter, maybe I should buy a sample and measure it! Main worry was the relatively poor off band blocking of OD > 4, but looking at the chart it isnt actually that bad!
Thanks for stopping by, Cuiv! Yes, the filter seems to perform good for its price. If you decide to get and measure it, I’d love to see your results! It looks like they only sell "golden" version now. I haven't tested mine yet. Perhaps next week we'll have some nice conditions.
Clear skies!
Beautiful final image!
Thanks!
another very nice video ty
Can you tell me where in image train sv220 and scorpio filters were installed?
I heard installing sv220 as far away from camera as possible reduces star halos.
Good point. The Scorpio filter is installed in the filter wheel that is screwed to the camera body, while SV220 was a few millimetres further from the sensor if I remember correctly. I used a filter drawer back in that time.
It’s a shame that you focused on the halos and not so much on the data quality between the two, I would love to see the nebulae details to compare him much data I’m losing with my 7nm SVBONY. But thank you for the video anyway. Maybe do another complimentary video focusing on the data quantity itself. The faint details you can get that the 7nm can’t resolve well
Thanks for the feedback!
I’ll focus on details when looking at the updated version of this filter that (as I understand it) will be selling instead of the original version.
just paid $500 for 2.5 nm antlia. all probably gets made at same place. lol
Halos come from insufficient absorption of light outside the bands of interest. This comes from using fewer optical layers, making the manufacturing cheaper. The filters that do not have halos have an OD better than 4.
Thanks for the insight! That makes a lot of sense-off-band light leakage due to fewer optical layers would explain halos in cheaper filters. I'm looking forward to the performance of the "golden" version of this filter.
You are very professional. May I ask you a question? How much wavelength does OD4 need? 1100nm or 1200nm?
@@LittleLightCamera Silicon has a band gap of 1.12 eV. According to the Planck's energy equation, this corresponds to the wavelength 1240/1.12 = 1107 (nm). Silicon does not absorb light at a wavelength higher than that. That's the upper limit of sensitivity of silicon photodetectors.
@ thank you very much. Top man.
this actually looks promising
Is this worth it for seestar s50/s30? And is it available for them?
Unfortunately, it won’t work with Seestar due to the filter’s size.
Looks promising
We'll see how the golden version performs.
Using mouse tail in 2025 😳 1337
Why not? 😁
First..
Made in Communust China ?
just like the device you used to write this enlightening question.
@nikaxstrophotography you have already failed, thinking Communist Chinese is the only option because they have destroyed all your buying choices through predatory subsidies.
My phone is a Samsung S10 built in KOREA and assembled in VIETNAM.
@@anandarochisha Mate I don't give a flying F**k about politics. I look at what's good for my pocket. Take it elsewhere this is not a political channel.