UHC--Optolong filter help you to solve light pollution

With the development of technology, colorful lights certified city became more bustling. However , it make a big problem for starry fans that many stars and nebular was hidden in lights. People who live in the city was unable to see the clear starry night and to get a image of the milk way.

The filter UHC from Optolong(Chinese professional filter manufacturer) is designed for taking images of deep space in the heavy light pollution. UHC can control Na and Hg lamp well to ensure astro objects have enough exposure time. Just so you know, generally we hope exposure time is long enough. But it will be limited by the skylight and glowlight. So use the filtrer to control the background skylight

to increase exposure condition. Anti-filter only effects light pollution to reflect wavelenth of light pollution rathr than signal of target objects. it is doesn't matter whether to use filter for exposure of target objects.

UHC filtering light pollution meanwhile cuse the Milk Way with continuous spectrum light reduce. So quality image of city milk way need to rely on astronomical software to post processing.

In spite of deep space or Milk Way, with UHC filter, rooftop terrace anywhere will be your creation stage. The anti-light pollution filter UHC launched urban starry sky series, Most impressed image of starry sky is The Milk Way of Victoria Harbour series photo with Optolong UHC by HK famours potographor Vicent Cheng. HK is one of the most strong light pollution place in the world. Vicent Cheng insist to shoot the milk way in the landmark of HK every year.

Optolong start overseas makert since 2015, and Vicent Cheng shoot a image of milk way of Victoria Harbour with UHC every year since 2015. Optolong continue to grow, Victoria Harbour continue to develop, Vicent Cheng always insist to take good photo, we are never stop steps.

The Milk Way of Victoria Harbour (2015)--by Vicent Cheng

The Milk Way of Victoria Harbour (2016)--by Vicent Cheng

The Milk Way of Victoria Harbour (2017)--by Vicent Cheng

Optolong had won high opinion from Vicent Cheng in his book Wild Filed Photographic

The lists of equipment in shooting the milk way

camera, lens, filter, eqoatenal mount

Image of milk way post procesing can refer to course of Turret of Palace Museum of @SI Ming Kong WU.

Link:故宫角楼银河后期制作

【Urban deep space series】

Urban light pollution means that one-fifth of the world's population can no longer see the Milk Way with the naked eye.

Except for city Milk Way, astro fans also love to create city starry sky. Chinese atro fans @a half of million had shot many deep sky objects in his balcony with UHC.

Janpan Optorun coating Equipment/Election-beam gun evaporation with lon-assisted deposition

UHC curve measured drawing
The picture above shows the spectral curve of UHC, in which the orange is the wavelength Na and Hg light.The green is the wavelength of astronomical emission nebula, planetary nebula and supernova remnant. RGB contain 400-700nm. The filter cut away light pollution, while the other band is high penetration to improve the contrast effect.

The frame uses aerometal material, precise CNC machining, anodic oxcidation treatment, corrosion resistance, lightweight (50% lighter than titanium), with strong flexibility and high stability, excellent electromagnetic shielding and thermal conductivity is also widely used in various fields.

The surface of the frame is treated with fine matte, effectively eliminate (absorb) stray light, reduced diffuse reflection, and ensured the imageing quality.

【UHC & L-Pro color contrast】

UHC deep space contrast:

Urban Milk Way contrast, photo by photographor Yu Le

From color contrast between L-Pro and UHC, we can easily to see that L-Pro is good at reductive, suitable for less light pollution (suburb). UHC with strong color cast is suitable for strong light pollution(city) and its images depend on photoshop.

Camera system set launched by Optolong

L-Pro is positioning suburbs, UHC is positioning the city, the suit can better apply for different light pollution environment.

L-Pro with good color banlance, adjustment is easy. UHC filtered much light pollution with strong color deviation, suitable for the city, computer adjustment is coplex.

Filter set manufactured with exclusive coating technology by Optolong

Notice

1. Nikon FF must be used when the reflector plate was raised, and recommended to use Nikon E series lens and deputy factory lens.

2.Canon full-frame EOS-FF must be used when the reflector plate was raised, and can only be used for EOS 5D2 / 3,6D

3.EOS-C can be installed 360 °, except EF-S lens

4.Sony Eport mirroless series

Sony E-EF set, E mount take Canon lens

Sony E-NG set, E mount take Nikon lens

5.Post-filter will cause optical path difference to change. So we need bring it into focus when used, every time. With the ultra wide lens, the coma will be increasing obviously, proposing to tailor.

6.Interference filter directly to shoot the light source will flare easily which is due to multiple reflection in coating. Therefore, to avoied when shooting as possible.