Optolong clip in camera astronomy photography light pollution filter 

OPTOLONG astronomical filters inspected by Shimadzu spectrophotometer in order to guarantee the most accurate spectral characteristics so that make your photographic image clearer and brighter.

Best suited for visual observing, the UHC (Ultra High Contrast) filter helps boost the contrast of deep sky objects while blocking street lights and airglow. The filter works by blocking the wavelengths or mercury and sodium-vapour used in urban lighting while letting the visible and H-Alpha emissions through. The UHC filter let the O-III and H beta lines through and through blocking the sky background it helps bring out details and contrast to planetary and gas nebulae.

Main Features

1. OPTOLONG UHC built-in filter is only for Canon EOS 5D2/ EOS 5D3/ EOS 6D

2. Ion and electron gun auxiliary IAD coating process, membrane layer firmer, more dense

3. Base material through double sided polishing finishing grinding processing

4. Metal frame, superior aviation aluminum, convenient disassembly

5. Sophisticated CNC molding in one

6. Optical equipment professional grit blasted and anodize aluminum. Extinction dealing within frame in order to prevent reflection

7. Laser engraving characteristic is never-faded

8. Plastic box: PP material

9. Liner in plastic box: imported high-pressure white EVA material

10. High-density foam as liner

Spectrum curve

FAQ

1. Why do we need a light pollution suppression filter?

The astrophoto is more easily washed out by sky background, or overposed, which makes the longer exposure impossible. But we all know that it is important to expose your images so that faintest detail is not impacted by noise of your DSLR camera (CCD). Light  pollution filters are designed to block wavelengths of skyglow, and more generally light pollution, and passing other wavelengths(particular the nebula lines), thus allowing longer astrophoto exposures to be made filters blocking light pollution while not weaken signals of objects. It is true that longer exposure times with light pollution filters work while exposure effects will not change with or without filters.

2. Is it enough that only one filter work on all objects?

No. it isn't. Different filter has different degree of suppression.  Filter designed to select specific narrow emission lines may suppress broad parts of the spectrum, decreasing the light from broadband source even more than filters designed for balanced color photography.  Broadband filter such as L-Pro filter performance better than UHC filter for full spectrum objects. But for emission line objects and serious light pollution areas, UHC is a good choice.  

3.There is some problem with the product design. Could you help us to resolve the problem?

We are much appreciate supply you product design. With years of developing, we have much experience and own understanding of coating design according to different applications. There is much we could do for you.

4. Could Optolong support on prototype for sample offer?

There is no MOQ requirement for the prototype filters. We even could offer free samples for OEM according to the condition.

5. Could Optolong supply OEM for customer?

Yes, we could. Send us your data details which your requirement. Our technical engineer will design products for you. Furthermore, Optolong standard products also welcome.

Packaging &shipping

Packaging details:  UHC filter*1

                                   Color paper box*1

                                   PP plastic case*1

                                   Test report*1

                                   Instruction*1

                                   Installation guide*1

Delivery details: 2-5 working days after payment received