Astrodon 1.25" Sloan Y Filter

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Astrodon 1.25" Sloan Y Filter
Item # AN-SL-Y2-27R
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  • The Astrodon 1.25" Sloan Y Filter is a high quality scientific filter with a very high 50% Transmission point compared to other, similar filters from the same generation and set.
  • Note: Image is of the full Filter Set, but this is just the Y Filter, not all the others as well.


Astrodon 1.25" Sloan Y Filter

Astrodon's newest generation of Sloan Digital Sky Survey filters are of the highest quality, as usual- improving beyond previous models notably, and even introducing two entirely new filters! This is one of those two entirely new filters; the 'Y' Filter, which boasts an incredibly high 50% transmission point of 950/1058. The dielectric coatings used on this filter ensure steep cut-on and cut-offs and peak transmissions in excess of 95%.

It is of note that the Sloan Digital Sky Survey- SDSS- photometric system is the most commonly used filter set today, even being used in the Hubble Space Telescope. Much of photometry up to magnitude 23 will be done in this system with meter-class telescopes.

The Y Filter in particular is a part of Astrodon's second generation of Sloan Filters, and was designed based on technical input from Las Cumbres Observatory Global Telescope Network (LCOGT) and others. The Y filter's intended role is simple; to make sure that it is the filter and not the detector that controls the high wavelength cut off.

Astrodon 1.25" Sloan Y Filter: Specifications

  • 50% Transmission point of 950/1058
  • Peak transmission guaranteed > 95%
  • <=0.03%Tabs out-of-band 300 - 1100 nm
  • Single striae-free fused silica substrates
  • 1/4-wave propagated wavefront prior to coating
  • <0.5 arcminute substrate parallelism
  • 3.000 +/-0.025 mm substrate thickness prior to coating
  • USA Made
Manufacturer Product Number: SL-Y2-27R
Additional Information

Additional Information

Manufacturer Astrodon
Type of Filter Sloan u'g'r'i'z'
Filter Usage Imaging
Single or Set? Single Filter
Filter Size 1.25"
Filter Shape Round
Filter Mounted? Mounted
Warranty 5 Year Warranty
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