Optolong L-Pro Deep Sky Filter - Clip Filter for Canon EOS-R Cameras
Ships by Next Business Day
Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.
US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.
International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.
1. About Optolong's L-Pro Filter
The Optolong L-Pro clip-in filter reduces the effect of artificial light pollution and natural skyglow for visual observing and for photographic applications with color CCD and DSLR cameras. While the Optolong UHC and CLS filters help to block the effects of light pollution, they pass light only in the green and red part of the visible spectrum. The L-Pro filter has a more sophisticated multi-layer coating that not only passes green and red light, but also blue and yellow/orange light. This results in a more natural color cast in images of deep-sky objects. The filter also suppresses IR wavelengths for photographic applications.
The Optolong L-Pro clip-in filter improves image contrast by passing light from many types of nebulae while selectively blocking the transmission of light from high and low pressure sodium vapor and mercury vapor lights as well as skyglow caused by naturally occurring neutral oxygen atoms in Earth’s atmosphere. The filter passes light emitted by hydrogen atoms (at 486nm and 656nm), oxygen ions (at 496nm and 500nm), nitrogen ions (at 654nm and 658 nm), and sulfur ions (at 672nm). These bands of light are emitted by emission nebulae such as the Orion and Lagoon Nebulae, planetary nebulae such as the Ring and Cat’s Eye Nebulae, and by supernova remnants such as the Veil Nebula. The filter can also help improve the contrast of stars and galaxies against the background sky, especially in photographic applications. The filter can also help improve the contrast of stars and galaxies against the background sky without sacrificing color balance, especially in photographic applications.
2. L-Pro EOS-R Compatible Cameras and Lens :
- Applicable camera body: EOS R/Ra, EOS RP, EOS R5, EOS R6
- Applicable Lenses: Full range of RF main and auxiliary lens; Full range of EF main and auxiliary lens (adapter is required）
3. EOS-R L-Pro Clip Filter - Important Caveat
Due to the peculiarity of Canon R series micro-single optical path, aperture design and light incidence angle, slight dark angle interference will occur on both sides of the frame when using this interference filter for imaging. There are two solutions to solve peripheral interference phenomenon：
- Cut out the interference areas of pictures.
- By post processing via RAW (attach video tutorials).
For more information about this, including sample images, please see the Optolong product page for this item.
4. L-Pro Spectrum and Characteristic
According to the relatively light pollution in suburbs, the image does not produce obvious color deviation phenomenon. The multi-band spectrum is specially designed and optimized as shown in the figure below.
- Peak transmittance: T>90%
- Blocking range: 380nm-750nm
- Blcocking depth: light pollution line blocking >90%
- Surface quality: 60/40(Refer to MIL-O-13830)
- Transmitted Wavefront RMS: λ/4
- Parallelism: 30s
5. L-Pro Imaging Target and Working Environment
Imaging Target:
- In light pollution environment, it suits for imaging the Milky Way at all seasons with wide Angle lens
- In light pollution environment, it suits for imaging deep sky objects at all seasons;
- Suitable for continuous spectrum of celestial objects, such as nebulae, galaxy, Milky Way, etc.
6. Working Environment
- L-Pro is suitable for level 3-7 according to the Bortle dark space classification.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
1. About Optolong's L-Pro Filter
The Optolong L-Pro clip-in filter reduces the effect of artificial light pollution and natural skyglow for visual observing and for photographic applications with color CCD and DSLR cameras. While the Optolong UHC and CLS filters help to block the effects of light pollution, they pass light only in the green and red part of the visible spectrum. The L-Pro filter has a more sophisticated multi-layer coating that not only passes green and red light, but also blue and yellow/orange light. This results in a more natural color cast in images of deep-sky objects. The filter also suppresses IR wavelengths for photographic applications.
The Optolong L-Pro clip-in filter improves image contrast by passing light from many types of nebulae while selectively blocking the transmission of light from high and low pressure sodium vapor and mercury vapor lights as well as skyglow caused by naturally occurring neutral oxygen atoms in Earth’s atmosphere. The filter passes light emitted by hydrogen atoms (at 486nm and 656nm), oxygen ions (at 496nm and 500nm), nitrogen ions (at 654nm and 658 nm), and sulfur ions (at 672nm). These bands of light are emitted by emission nebulae such as the Orion and Lagoon Nebulae, planetary nebulae such as the Ring and Cat’s Eye Nebulae, and by supernova remnants such as the Veil Nebula. The filter can also help improve the contrast of stars and galaxies against the background sky, especially in photographic applications. The filter can also help improve the contrast of stars and galaxies against the background sky without sacrificing color balance, especially in photographic applications.
2. L-Pro EOS-R Compatible Cameras and Lens :
- Applicable camera body: EOS R/Ra, EOS RP, EOS R5, EOS R6
- Applicable Lenses: Full range of RF main and auxiliary lens; Full range of EF main and auxiliary lens (adapter is required）
3. EOS-R L-Pro Clip Filter - Important Caveat
Due to the peculiarity of Canon R series micro-single optical path, aperture design and light incidence angle, slight dark angle interference will occur on both sides of the frame when using this interference filter for imaging. There are two solutions to solve peripheral interference phenomenon：
- Cut out the interference areas of pictures.
- By post processing via RAW (attach video tutorials).
For more information about this, including sample images, please see the Optolong product page for this item.
4. L-Pro Spectrum and Characteristic
According to the relatively light pollution in suburbs, the image does not produce obvious color deviation phenomenon. The multi-band spectrum is specially designed and optimized as shown in the figure below.
- Peak transmittance: T>90%
- Blocking range: 380nm-750nm
- Blcocking depth: light pollution line blocking >90%
- Surface quality: 60/40(Refer to MIL-O-13830)
- Transmitted Wavefront RMS: λ/4
- Parallelism: 30s
5. L-Pro Imaging Target and Working Environment
Imaging Target:
- In light pollution environment, it suits for imaging the Milky Way at all seasons with wide Angle lens
- In light pollution environment, it suits for imaging deep sky objects at all seasons;
- Suitable for continuous spectrum of celestial objects, such as nebulae, galaxy, Milky Way, etc.
6. Working Environment
- L-Pro is suitable for level 3-7 according to the Bortle dark space classification.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
Optolong L-Pro Deep Sky Filter - Clip Filter for Canon EOS-R Cameras