Apertura Ultra High Contrast 2" Filter
Reduce The Effects of Light Pollution With This Apertura UHC Filter!
Light from street lamps, businesses, and homes illuminate our sky, making it very difficult to observe many of the fainter, yet interesting, deep sky objects. Adding the right filter to your setup can greatly enhance your viewing experience, which is why the team at Apertura has developed this highly beneficial filter! The Apertura UHC Filter is designed to block out many forms of annoying light pollution from your surroundings, greatly improving contrast within your eyepiece. Now, even if you live in an area with relatively heavy light pollution, you can enjoy views of many emission and planetary nebulae, as well as supernova remnants such as the famous Veil Nebula, that would have otherwise been tough or impossible to see!
UHC stands for “Ultra High Contrast”, and living up to its namesake, UHC filters are one the more aggressive types of light pollution suppression filters available on the market. While still classified as a broadband filter, this Apertura UHC Filter has narrower bandpasses than that of CLS or Moon and Skyglow filters, resulting in higher contrast views and a darker sky background. Artificial light from mercury vapor lamps and sodium vapor lights as well as Moon glow are all effectively blocked out, leaving only the light that you want to see! Due to the wavelengths of light allowed by the UHC filter, brighter stars surrounding the nebula may reveal a purple tint so keep that in mind when using this filter. Views of exciting targets such as the Ring Nebula, as well as showpiece targets such as the Lagoon and Trifid Nebula, are enhanced, as are the resolution of otherwise invisible nebulous structures within the Great Orion Nebula!
Emphasize Detail and Improve Contrast With This High Performance Filter
Let's Take a Deeper Look!
What sets one filter apart from another? Which filter is best for me? When developing a filter, manufacturers provide a chart that represents the wavelengths permitted through this filter. This gives insight into the filter’s performance, and what it can help you achieve. So, how exactly do I read a transmission chart? Our team has put together a comprehensive article, to help you understand the fundamentals on How to Read a Transmission Chart. Check out the article and feel more confident about choosing the right filter for your needs!
Ultra High Contrast - Elevate Your Visual Experience
With its high quality design and specialized coatings, this filter cuts through the murk of light pollution, enhancing your views of numerous celestial objects. Read more about this Apertura UHC Filter below!
Stunning Emission Nebulae Structure
Designed to cut out large portions of light, broadband targets such as galaxies and faint star clusters can become too dim to view while using a UHC filter, however, when used on targets such as emission nebulae, this is where this Apertura UHC filter really excels! Emission nebulae are celestial bodies that emit certain wavelengths of light, typically in the Ha, H-beta, and OIII band passes. This Apertura UHC Filter lets in all three band passes while simultaneously blocking out unwanted wavelengths. By focusing on just the light from these wavelengths, intricate details can be discerned that otherwise would have been difficult to see, if visible at all. While this filter is greatly beneficial under light polluted skies, using it under dark skies will give you even greater enhancement of the nebula's structure and fine detail. This means that views of nebulae such as the Swan, Crescent, and Owl Nebula, plus plenty more, are sure to impress. Some planetary details may also be enhanced while using this filter, such as the Great Red Spot on Jupiter, and higher definition of surface features on Mars. As this Apertura UHC filter cuts out wide bands of wavelengths, these inherent light blocking abilities means filter stacking is not recommended with this accessory.
Compatible With Almost Any System
This Apertura 2” UHC Filter is mounted within a sturdy filter cell, and seamlessly incorporates into your visual set up for high contrast views. Simply thread it onto the bottom of your 2” eyepiece, or any 1.25" to 2" adapter that is threaded for 2" filters, then insert your eyepiece into your visual back or diagonal, and you’re ready to go! This filter has been optimized for eyepieces with exit pupils of 2mm or larger when viewing deep sky targets.
Built With Quality in Mind
Known for their high caliber craftsmanship, this Apertura UHC filter is no exception. Its Surface Quality of 60/40, Surface Flatness of λ/4, and Schott B270 glass uphold viewing quality by maximizing sharpness and clarity. Also, high precision coatings through Ion Assisted Deposition (IAD) technology further enhance performance by reducing light scatter and improving environmental resistance and physical durability. Off-band blocking is also at play, a technique that assists in blocking light transmission of the unwanted wavelengths for even better light pollution suppression!
Comes with the Apertura Absolute Warranty!
The Apertura Absolute Warranty provides two years of coverage against product defects. After the initial two-year warranty expires, this product qualifies for Apertura's Three-Year Accident Replacement Program. In addition, the Apertura Absolute Warranty is transferrable! Download a copy of the Apertura Absolute Warranty for more information on this program, how to make a claim, and why it is important to keep your original receipt and the product's original boxes & packaging!
Astronomy Hub: Your one-stop-shop for Astrophotography Knowledge!
Our Gear Experts have compiled a wealth of information to help expand your astrophotography knowledge! Below you’ll find links to articles, videos and "how-to" guides. Just one more reason that our Astronomy Hub is a one-stop-shop for all your astronomy and astrophotography needs!
| The Effects of Light Pollution |
| 10 Things You Need to Know About Nebulae |
| Telescope Eyepieces Guide |