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Astronomik L-3 UV-IR Blocking EOS XL Full Frame Clip Filter - L3-EOSXL

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SKU: ASF-L3-EOSXL

Astronomik UV-IR Blocking Luminance Filters


The Luminance channel is perhaps the most critical aspect of creating a superb final image. In order to achieve the greatest signal quantity, the filter being used should have the highest possible transmission with a wide spectral bandpass. These two elements allow for the highest sensitivity and give you maximum photon counts on your pixels. Even though the high level of transmission is an excellent characteristic of these new Luminance filters, perfect color correction is not universal on all optical instruments, or additional optical elements such as correctors, reducers, and flatteners. Thus, problems may arise due to the Luminance filter's spectral bandpass width. Stars may appear soft or bloated due to the transmission of incompletely focused light (chromatic aberration) if the band pass is too wide. When this happens, image processing can be difficult. However, this damaging result can be reduced or completely nullified by having a spectral window that is slightly narrower in your Luminance filter.

In order to provide users with all the necessary tools to gather the best possible data, Astronomik has bolstered their Luminance filter line. Now you can choose Luminance filter ideally suited for your telescope type to achieve the highest signal and sharpest image for the Luminance channel.

Your telescope's color correction will determine whether you should use a filter with a wider spectral window for the Luminance channel. The L1 features the widest spectral window, while the L3 has the narrowest. The L2 is roughly the same as the current Astronomik L-Filter.

For optical systems that are totally free of chromatic aberration, the L1 filter is the best option. When working with most optical systems using a correcto, flattener, or reducer in the optical train for common use, the L2 is your choice. Lastly, for users with refractors that feature less than perfect color correction, the L3 filter works best. Also, the L3 can combine with Astronomik's new Deep-Sky RGB filters to lessen the bluish halo effect around stars.

The transmission curve characteristics and coatings on the new Luminance filters have been designed and engineered in such a way that no halos or reflections will be visible. Even with bright stars in the field of view you will be able to reveal the faintest structures in galaxies or nebulae.

Like all Astronomik Filters, the new Luminance filters are made using an extremely durable and scratch resistant coating, deposited on the finest polished optical substrate, which is free of any striae or internal strains. All substrates are made to exactly the same thickness, so all Astronomik filters are parfocal.

Astronomik UV-IR Blocking Luminance Filter Highlights


  • Parfocal with all other filters made by Astronomik
  • Fully protects against the effects of scratching, aging, and high humidity
  • Diffraction limited, this filter will not compromise the optical performance of your telescope
  • Astronomik filters are delivered with a long-lasting, supreme quality plastic filter case
  • German-made for high optical quality
  • Compatible with Canon full frame 5D MK II, 5D MK III, and 6D DSLR cameras
  • Please note that Astronomik XL Clip filters will not work with the Canon 6D Mk II, 5DS, 5DSR, and the 5D Mk IV camera bodies, and will only work without LiveView with the Canon 5D Mk I


Astronomik Full Frame Clip-Filter System


This Clip-Filter system, unique to Astronomik, is produced using black anodized aluminum and laser-cut on the most current machinery. EOS XL full frame clip filters are made to work with full format Canon DSLR camera bodies like the 5D Mk II and 5D Mk III. It only takes seconds to insert this Clip-Filter into the camera body of the Canon EOS using just your fingers. Removes quickly and easily as well. Requires no tools or modifications, and all lens operations such as focus, screen, and image stabilization, remain functional! The Astronomik Clip-Filter system also prevents dust from gathering on your sensor during long exposures. Unfortunately this filter is not compatible with the Canon EOS 6D Mk II.

Compatible Canon EOS Bodies

 Model 
 Compatible? 
 LiveView? 
EOS 6D
Yes
Yes
EOS 6D MkII
No
N/A
EOS 5D
Yes
No
EOS 5D Mk II
Yes
Yes
EOS 5D Mk III
Yes
Yes
EOS 5D Mk IV
No
N/A
EOS 5D Mk IV
No
N/A
EOS 5Ds
No
N/A
EOS 5Dsr
No
N/A
EOS 1Dx
No (all versions)
N/A