Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Svbony Uhc Flter

  • Please log in to reply
29 replies to this topic

#1 astroclint

astroclint

    Vostok 1

  • -----
  • topic starter
  • Posts: 147
  • Joined: 14 Jun 2017
  • Loc: Parker Colorado

Posted 03 July 2017 - 02:16 PM

I have seen alot of these cheap svbony uhc filters on ebay are they worth getting or should I avoid them and get a dgm npb.



#2 danastro

danastro

    Lift Off

  • -----
  • Posts: 8
  • Joined: 22 May 2017

Posted 06 July 2017 - 02:33 AM

I recently purchased svbony 2" uhc filter from ebay for $38.  I use it for astrophotography and it works pretty good cutting out the red zone light pollution.  I do not have any other uhc filter to compare it against.  I can only compare it against my Orion 2" skyglow astrophotography filter and the svbony uhc lets me expose much longer.


  • astroclint likes this

#3 astroclint

astroclint

    Vostok 1

  • -----
  • topic starter
  • Posts: 147
  • Joined: 14 Jun 2017
  • Loc: Parker Colorado

Posted 06 July 2017 - 01:09 PM

That's great to hear I just purchased svbony uhc filter since it was on the cheap side I to also live in a red zone.


Edited by astroclint, 06 July 2017 - 03:08 PM.


#4 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 46,727
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 06 July 2017 - 05:54 PM

It's hard to get excited about a UHC filter where the seller doesn't even mention the bandwidth, show a graph of its response,

or mention its transmission percentage at any wavelength.

You have no idea what you're getting.

It might be OK, but there is a high likelihood it is one of the "wide" filters that more closely resembles a broadband.

If that's the case, it will add a tiny bit of contrast.

 

It looks like the same filter is sold under about a half dozen labels.

 

One thing: you can send the filter to Lumicon and they will test it for free and send you back a graph of its response with your tested filter.

That would be one good way to find out just what it is.  If it turns out to be good, it might spark a ton of sales.


  • Shneor likes this

#5 astroclint

astroclint

    Vostok 1

  • -----
  • topic starter
  • Posts: 147
  • Joined: 14 Jun 2017
  • Loc: Parker Colorado

Posted 06 July 2017 - 06:24 PM

I have a copy of one of the pictures showing the bandwidth.

Attached Thumbnails

  • Svbony filter.jpg

  • Jon Isaacs and Simon B like this

#6 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 46,727
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 06 July 2017 - 07:52 PM

If that's correct, then it closely resembles on of the Yulong UHCs, and would be categorized a "Wide UHC with Red transmission"

It's almost a broadband/CLS filter.


  • Jon Isaacs and CrazyPanda like this

#7 astroclint

astroclint

    Vostok 1

  • -----
  • topic starter
  • Posts: 147
  • Joined: 14 Jun 2017
  • Loc: Parker Colorado

Posted 10 July 2017 - 09:37 PM

I notice astronomics sell's astro tech uhc filter's anyone have this filter.



#8 Adun

Adun

    Mercury-Atlas

  • *****
  • Posts: 2,654
  • Joined: 02 Dec 2016

Posted 10 July 2017 - 10:37 PM

I have a copy of one of the pictures showing the bandwidth.

 

That's the one I've got.

 

Since they are cheap, I got it instead of a skyglow/moon/82a filter. I have tested it with M27 at home (red zone, 2 million people city) and it did help, it made it visible with my small 114mm, but just barely.

 

Since I've gotten much better results through EAA, I have not used it again, but what danastro says is a good point, I should try using it for EAA instead of an IR/UV. It could help.


Edited by Adun, 11 July 2017 - 04:21 PM.


#9 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 46,727
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 11 July 2017 - 09:06 AM

I notice astronomics sell's astro tech uhc filter's anyone have this filter.

Specs show a modestly wide 32nm bandwidth in the blue-green (it would still be considered a UHC-type, though), but 

I have not seen any specs published concerning the red wavelengths longer than 600nm, so it's unknown if there is any red transmission.

It's only available in a 1.25" size, implying it's for smaller scopes that only use 1.25" eyepieces.

Nebula filters are generally used at 10x/inch of aperture or even lower powers, and that means your low power eyepieces should be 1.25"

to make a 1.25" filter a practical purchase.


  • wrnchhead likes this

#10 astroclint

astroclint

    Vostok 1

  • -----
  • topic starter
  • Posts: 147
  • Joined: 14 Jun 2017
  • Loc: Parker Colorado

Posted 12 July 2017 - 08:56 PM

Starman1 how do I contact lumicon to test the svbony filter I haven't been able to test it since it's cloudy.



#11 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 46,727
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 13 July 2017 - 12:50 AM

Toll Free: (877) 623-4021
Phone: (916) 671-5735
Fax: (916) 671-5669

Email: doug@farpointastro.com

 

See: https://www.cloudyni...on#entry7828747


Edited by Starman1, 13 July 2017 - 12:54 AM.

  • paulsky and H-Town Rocket Man like this

#12 astroclint

astroclint

    Vostok 1

  • -----
  • topic starter
  • Posts: 147
  • Joined: 14 Jun 2017
  • Loc: Parker Colorado

Posted 18 July 2017 - 03:03 PM

I sent the filter to lumicon today it should arrive there by friday.


Edited by astroclint, 18 July 2017 - 03:08 PM.


#13 astroclint

astroclint

    Vostok 1

  • -----
  • topic starter
  • Posts: 147
  • Joined: 14 Jun 2017
  • Loc: Parker Colorado

Posted 02 August 2017 - 12:46 AM

 got the filter back from lumcon.

Attached Thumbnails

  • filter1.jpg

Edited by astroclint, 02 August 2017 - 01:18 AM.

  • Adun, Ohmless, wrnchhead and 1 other like this

#14 MrJones

MrJones

    Mercury-Atlas

  • *****
  • Posts: 2,611
  • Joined: 15 Sep 2010
  • Loc: Indiana

Posted 02 August 2017 - 07:56 AM

Thanks for posting and thanks to Lumicon for the service. I was wondering how close to the Optolong this would be. The Optolong is a little better from the spectra I've seen but this looks like a decent broadband filter for that crazy price.


  • Ohmless likes this

#15 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 46,727
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 02 August 2017 - 10:17 AM

Yes, you could call it a "wide UHC-type" or a "broadband".

Similar to Yulong's UHC filter.



#16 Adun

Adun

    Mercury-Atlas

  • *****
  • Posts: 2,654
  • Joined: 02 Dec 2016

Posted 04 April 2018 - 07:28 AM

I can comment that for EAA use this filter has been very useful. Without it I could not have seen the flame nebula nor the horsehead.


  • astroclint and howardcano like this

#17 astroclint

astroclint

    Vostok 1

  • -----
  • topic starter
  • Posts: 147
  • Joined: 14 Jun 2017
  • Loc: Parker Colorado

Posted 04 June 2018 - 09:45 PM

Since the svbony filter graph is so small I added it to my flickr so it can at least be magnified just put the curser on the graph and left click on the mouse glad to hear it's working with the EAA.

https://www.flickr.c...eposted-public/


Edited by astroclint, 04 June 2018 - 10:08 PM.


#18 astroclint

astroclint

    Vostok 1

  • -----
  • topic starter
  • Posts: 147
  • Joined: 14 Jun 2017
  • Loc: Parker Colorado

Posted 04 June 2018 - 10:12 PM

Moderators can you please put an I for filter my I key sometimes doesn't work Thanks.



#19 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 46,727
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 05 June 2018 - 11:03 AM

The curve looks very much like a Yulong (Optolong) or StarGuy UHC, with high transmission and a bandwidth of ~50nm.

If it's less expensive thanYulong's, it might be a better deal.

It's definitely a wide  UHC type with red transmission.



#20 astroclint

astroclint

    Vostok 1

  • -----
  • topic starter
  • Posts: 147
  • Joined: 14 Jun 2017
  • Loc: Parker Colorado

Posted 05 June 2018 - 12:02 PM

They sell them on ebay.

The 2 inch one is $31.95.

https://www.ebay.com...hcAAOSwfpVZGSF~

 

The 1.25 is $18.79.

https://www.ebay.com...qYAAOSwsW9Yw5Ut

 

About under half the cost of a Optolong  $68.00 2 Inch one which is on sale.

https://agenaastro.c...ula-filter.html

 

Same with starguy.

Starguy 1.25 uhc filter cost $49.95

https://www.mrstargu...r-p/quh403y.htm


Edited by astroclint, 05 June 2018 - 12:35 PM.


#21 Brapp

Brapp

    Explorer 1

  • -----
  • Posts: 64
  • Joined: 09 Jan 2018

Posted 10 August 2018 - 08:10 AM

I bought the Svbony "UHC" 1.25" filter as my first filter. I want to try more expensive ones before I buy them. Anyway, to any beginner looking for a filter, I'd say it works well to bring out detail in various nebulae. Where I live, there is often a thin haze of faintly illuminated humid air. This filter does well at cutting out that light.
Last night it truly made the Veil pop, made the North American nebula truly visible for the first time for me, and improved views of the Dumbbell nebula.
For less than $20 I'm really satisfied.
  • paulsky, Adun and astroclint like this

#22 MatthewT

MatthewT

    Lift Off

  • -----
  • Posts: 11
  • Joined: 21 Jan 2016
  • Loc: Central Massachusetts

Posted 12 February 2019 - 09:28 AM

I just bought the Svbony UHC from Ebay to go with a 6 inch f5. I'll let you know how it performs for me once it arrives and we have a clear night that isn't 10 degrees!

#23 vdog

vdog

    Surveyor 1

  • *****
  • Posts: 1,762
  • Joined: 30 Aug 2018
  • Loc: California Central Valley, U.S.A.

Posted 12 February 2019 - 10:50 AM

That filter is underrated.  It's pretty decent for the price.  I gave mine away to a needy filter-less fellow amateur after I upgraded.



#24 Cirus

Cirus

    Mariner 2

  • -----
  • Posts: 204
  • Joined: 08 May 2018

Posted 02 August 2019 - 10:39 PM

I purchased Svbony 1.25" UHC filter as someone that has never used a UHC filter before because I was apprehensive on spending a lot of money for a filter that I wasn't sure would make any difference.

 

Considering the cheap price, my expectations were low and had nothing to lose.

 

Using it on the Orion Nebula in Bortle 4, I have not been able to notice significant improvement. However using it on the Carina Nebula made a significant difference. It made the contrast of the nebula between light and dark really stand out. While without the filter, the greys of the sky background and nebula are more blended together and its harder to see.

 

I don't mean to brag but if you haven't seen the Carina Nebula before, you are missing out! smile.gif

 

This filter makes turns everything into a shade of teal, while making the background darker. One annoyance though is that the Svbony UHC causes stray light sources from behind me to reflect in the eyepiece, and stars inside the eyepiece produce a distorted red ghost. I'm not sure whether this is something that only applies to cheap UHC filters or to all?

 

Sagittarius is high in the sky with various nebulae. While I haven't tested the Svbony filter on them yet, I have also recently bought a high quality Astronomik UHC filter. I'm looking forward to seeing the difference!

 

The Astronomik will be my main filter, while the Svbony will be relegated to my travel scope set.


Edited by Cirus, 02 August 2019 - 10:50 PM.

  • Adun likes this

#25 Starman1

Starman1

    Vendor (EyepiecesEtc.com)

  • *****
  • Vendors
  • Posts: 46,727
  • Joined: 23 Jun 2003
  • Loc: Los Angeles

Posted 02 August 2019 - 11:15 PM

This filter makes turns everything into a shade of teal, while making the background darker. One annoyance though is that the Svbony UHC causes stray light sources from behind me to reflect in the eyepiece, and stars inside the eyepiece produce a distorted red ghost. I'm not sure whether this is something that only applies to cheap UHC filters or to all?

 

The teal color is to be expected, given the primary bandwidth is in the blue-green part of the spectrum.

As for the reflections, you need to pay more attention to blocking peripheral light by:

--raising the eyecup

--cupping your hands around the eyepiece when using it

--turn off the stray light sources behind you (you shouldn't be in direct eyesight of a light source anyway if you can hep it)

 

The red ghost is caused by the filter transmitting light in the red as well, which some nebula filters do (at all price ranges).  If this bothers you,

there are other filters with no red transmission at all.  There is a reasonable argument some red transmission enhances the size of many nebulae in the FOV.

TeleVue Nebustar, Orion Ultrablock, Lumicon UHC have no red.

Astronomik UHC, DGM NPB, and others transmit some red wavelengths.

 

The Orion Nebula is so bright, little improvement is made by a UHC filter in dark skies.  It should, however, produce a noticeable effect in brighter skies.


Edited by Starman1, 03 August 2019 - 08:49 AM.

  • Cirus likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics