OPTOLONG L Pro Optical camera lens filters for DSLR Camera Blocking Light Pollution in Imaging Observing
- Category: Camera Filters >>>
- Supplier: Optolong Optics Co. Ltd
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Product Overview
Description
Product Description
Brief Introcuction of Astronomical Filter L-Pro
Optolong L-Pro (L-Professional) filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.
Specification
Substrates: | B270 |
Surface Quality | 60/40 |
Spectrum | 380-750nm |
Transmittance | T=50%；T＞90% |
Reflectivity | T≤5% |
Size | 1.25" ;2" ;M77; EOS-C ;EOS-FF; Sony-FF; NK-FF |
Technical Data1 | Fine-optically polished to ensure accurate 1/4 wavefront and < 30 seconds parallelism over the both surfaces |
Technical Data2 | High transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm&500nm, SII 672nm and H-beta 486nm). |
Technical Data3 | Precision off-band blocking, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm). |
Company Profile
Company story
Optolong Optics Co.,ltd supply fluorescence filters and astronomical filters form 1999, we have distributor around the word and had 20 years of experience in the filter industry, mainly including standard products for fluorescence filters, OEM products, and standard products for astronomical filters. Regarding the company details,please browse our website:
Astronomical Filters website://optolong.com/cms/index/index.html
Fluorescence Filters website:https://optolongfilter.com/
Astronomical Filters website://optolong.com/cms/index/index.html
Fluorescence Filters website:https://optolongfilter.com/
Hot Sale Products
Company profile: We are a china manufacturer of astronomy filters, fluorescence filters and microscops cubes since 1999. Our astronomy filters including main products are as follows:
1. L-series (L-Pro, L-eNhance, L-eXtreme, L-uLtimate coming soon).
2. Narrowband filters (H-Alpha 7nm, SII 6.5nm, OIII 6.5nm)
1. L-series (L-Pro, L-eNhance, L-eXtreme, L-uLtimate coming soon).
2. Narrowband filters (H-Alpha 7nm, SII 6.5nm, OIII 6.5nm)
3. Ultra narrowband Filters (H-Alpha 3nm, SII 3nm, OIII 3nm)
4. Other common astronomical filters (LRGB, Moon Skyglow Filter, UHC, OIII, CLS, CLS-CCD, UV/IR Cut, H-Beta etc.)
Application
Certifications
Our Advantages
Our service
1. Dimesion size, thickness up to customer requirements
2. Many material could be choosed, like BK7, Fused Silica
3. AR HR DLC coating or as your requestv
4. After-sales guarantee service
2. Many material could be choosed, like BK7, Fused Silica
3. AR HR DLC coating or as your requestv
4. After-sales guarantee service
Packing & Delivery
Packing:
1,Super clean workshops,protected with PE Film,no need to clean,available at any time,with lowest labor cost;
2,Wrapping with vaccum,damp-proof,dust-proof bag;
3,Plastic box，High-density carton,with protective sponge inside;
1,Super clean workshops,protected with PE Film,no need to clean,available at any time,with lowest labor cost;
2,Wrapping with vaccum,damp-proof,dust-proof bag;
3,Plastic box，High-density carton,with protective sponge inside;
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