Svbony 1.25'' UHC /UV-IR Elimination of Light Pollution Filters for Astronomy Telescope Eyepiece Observation of Deep Space

SVBONY UHC 1.25'' Filter for Astronomy Telescope Monocular Eyepiece Observations of Deep Space Object

Basically, it works by darkening the background so you can see more nebulosity that would otherwise be too faint
This filter has allowed one to actually see some small planetary nebulae that would otherwise be too washed out by the background to be seen, and I'm able to see more detail and more of the dimmer fringe of larger nebulae like the Orion Nebula, the Dumbbell Nebula, and the Lagoon Nebula.
It helps with finding the little planetary nebulae because it dims everything but the nebula, i.e. you can look at the same spot with and without the filter, and with the filter in place the stars are dimmed somewhat but the nebula isn't. The nebula is the dot that doesn't get dimmer when you thread in the filter. It works well at both low and high powers, too.

Features:

1.Brand New SVBONY 1.25" UHC filter
2.This filter is perfect for observation of faint and low-contrast deep-sky objects. These features make it perfect for observing nebulae and other deep-sky objects
3.Barrel diameter: 1.25'' simply attach to eyepiece-cased in a sturdy transparent case
4.Significantly reduces light pollution, great for city and suburban observation

Customer feedback on UHC filters:

This broadband (50nm) UHC works well and has allowed me to view nebula (other than M42 / Orion Nebula) for the very first time from my light polluted backyard. I never thought I would be able to detect nebula from my backyard, where I do most of my visual observing using 8" and 10" F5 dobs. I'm in a red/white light pollution zone which is considered "Bortle 8" aka "can't see ****, captain". This filter hits well above its weight and is comparable to a more expensive Optolong UHC filter.

Even with most of my city using LED street lights, whose light pollution is harder to filter out, this filter performed exceptionally and allowed me to detect nebulosity in Scorpius last night. The nebulosity was faint, but it was absolutely there. I didn't need to use averted vision or any other aids to detect it. With visual observing, you can't expect bright Hubble views albeit I suspect this filter would work exceptionally well for astrophotographers, who will be able to achieve great results with this filter + long exposures. The fact that I could visually detect any nebula at all that wasn't M42 in Orion makes this worth the measly $20 paid.

Members of a popular astronomy forum have sent the SVbony UHC filters out to Lumicon- one of the top optics and filter labs- and it revealed that this filter is virtually identical in performance to Optolong UHC filter and may even be the same thing. The Optolong is well regarded and sells for $80; a $20 SVbony performing the same as a filter that is 4X as expensive is a great deal.

The price and the performance of this makes it a must have filter if you don't have one. I'm not a fan of filters as I find the price:performance underwhelming for visual observing, but this filter hits all the right notes. I will likely buy SVbony of this filter, I like its performance enough that I want it available for my wide field EPs. I wish SVbony made an OIII; I'd buy it in a heartbeat if it performed as well as this UHC.

SVBONY 1.25'' UV-IR Cut Filter Telescope Optics Infra Red Filter CCD Camera for Astronomy Monocular Binoculars Telescope

The SVBONY filter is a better choice for all digital imaging with digital cameras;DSLR camera;CCD cameras;modified Webcams and telescopes
The UV-IR-Cut filter uses the very latest coating technology to deliver the high filtration quality and lifetime durability
The UV-IR cut filter combine with any of the other Baader filters screws into the back of the eyepiece or camera adapter to block out the chromatic aberration unwanted
So it delivers the sharper images possible;it can also reduce the ghost images caused by IR radiation

Features:

1.True optical quality glass substrate and coatings
2.Very low reflection multi-coating, Striate-free, and plane-parallel substrate
3.Combine with any of the other Baader filters, to deliver the sharpest images possible
4.Standard 1.25 inch Filter threads for 1.25" eyepieces and other accessories
5.Comes with a plastic box to keep it safe and clean when not in use
6.Interface Threads: M28.5*0.6

What can UV/IR CUT filters do for you?

Infrared or IR light is invisible to the human eye, so it is not a concern when you are using your telescope visually. However, when you add a camera to the mix, it's a whole other story. Unlike the human eye, a silicon sensor is very sensitive to light in the infrared portion of the spectrum, and that is a problem because infrared images are blurry as all get out. That means your nice, sharp visual light image is degraded by the addition of the infrared layer. This problem can easily be solved by blocking the infrared, and the SVBONY IR-Cut filter will do just that.
This filter is a must for all digital imaging with digital cameras CCD cameras and modified webcams. It's also useful for protecting valuable H-Alpha filters from heat stress and damaging IR (Daystar etc). Due to their extremely high optical quality these filters may be stacked and used far in front of the focal plane (necessary for imaging uses).
The UV-IR-Cut filter uses the very latest coating technology to deliver the finest filtration quality and lifetime durability.
Eliminates violet halos around bright stars (more effectively than simpler so-called Minus Violet photographic filters).

Package Details:

Package 1:1*1.25'' UHC filter
Package 2:1*1.25'' UV/IR CUT filter
Package 3:1*1.25'' UHC filter+1*1.25'' UV/IR CUT filter