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Astronomik L-2 UV-IR Blocking Filter - 27 mm Round - L2-27

SKU: ASF-L2-27

Product is backordered from the manufacturer. Once the order is placed our team will update you on the anticipated arrival date.

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Astronomik UV-IR Blocking Luminance Filters



For spectacular results, the Luminance channel is probably the most vital factor for image creation. To gain the greatest amount of signal possible, the filter being employed needs to have a wide spectral bandpass to realize the highest transmission possible. These two aspects combine to enable peak sensitivity and provide maximum photon counts on your pixels. Not all optical instruments, or supplemental optical elements like correctors, flatteners, or reducers have ideal color correction. So although the high transmission level of these new Astronomik Luminance filters is a terrific feature, the larger spectral band pass width of this filter can produce problems such as soft or bloated stars resulting from excess transmission of light that is not completely focused (chromatic aberration). Image processing can be challenging when this occurs. However, this detrimental effect can be reduced or even completely eradicated by having a Luminance filter with a spectral window that is slightly more narrow.



Astronomik has recently expanded their Luminance filter line to provide you with all the tools needed to gather the best possible data. Now you can select the Luminance filter best equipped for your specific telescope system to get the highest signal with the most clear image for Luminance channel.



The spectral window size you select for Luminance data will be contingent on your telescope's color correction. 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.



If your optical system is completely chromatic aberration free, you should get an L1 filter for your setup. For general use with most optical systems employing a corrector, flattener or reducer in the optical train, the L2 is optimal. The L3 filter is made for users with refractors that have less than ideal color correction. Plus, when used in conjunction with Astronomik's new Deep-Sky RGB filters, the L3 filter will reduce that annoying bluish halo 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 any other filter from Astronomik
  • Fully resistant to the effects scratching, aging, and high humidity
  • This filter is diffraction limited and thus will not reduce the optical performance of your telescope
  • Astronomik filters are delivered with a durable plastic storage case of superior quality
Description
Description

Astronomik UV-IR Blocking Luminance Filters

For spectacular results, the Luminance channel is probably the most vital factor for image creation. To gain the greatest amount of signal possible, the filter being employed needs to have a wide spectral bandpass to realize the highest transmission possible. These two aspects combine to enable peak sensitivity and provide maximum photon counts on your pixels. Not all optical instruments, or supplemental optical elements like correctors, flatteners, or reducers have ideal color correction. So although the high transmission level of these new Astronomik Luminance filters is a terrific feature, the larger spectral band pass width of this filter can produce problems such as soft or bloated stars resulting from excess transmission of light that is not completely focused (chromatic aberration). Image processing can be challenging when this occurs. However, this detrimental effect can be reduced or even completely eradicated by having a Luminance filter with a spectral window that is slightly more narrow.

Astronomik has recently expanded their Luminance filter line to provide you with all the tools needed to gather the best possible data. Now you can select the Luminance filter best equipped for your specific telescope system to get the highest signal with the most clear image for Luminance channel.

The spectral window size you select for Luminance data will be contingent on your telescope's color correction. 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.

If your optical system is completely chromatic aberration free, you should get an L1 filter for your setup. For general use with most optical systems employing a corrector, flattener or reducer in the optical train, the L2 is optimal. The L3 filter is made for users with refractors that have less than ideal color correction. Plus, when used in conjunction with Astronomik's new Deep-Sky RGB filters, the L3 filter will reduce that annoying bluish halo 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 any other filter from Astronomik
  • Fully resistant to the effects scratching, aging, and high humidity
  • This filter is diffraction limited and thus will not reduce the optical performance of your telescope
  • Astronomik filters are delivered with a durable plastic storage case of superior quality
Specifications
Specifications
Model Number L2-27
Single Filter, Set, or Accessory Single Filter
Filter Type UV/IR/Luminance
Filter Size 27 mm
Filter Shape Round
Filter Insert Style Drop-In
Warranty Ten (10) Years
What's in the Box?
What's in the Box?
  • Astronomik 27 mm Round L-2 UV-IR Blocking Luminance Filter
  • Plastic Storage Case
  • Astronomik L-2 UV-IR Blocker - 27 mm Round Filter
  • Astronomik L-2 Luminance UV-IR Blocking Filter Transmission
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