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Baader L-RGB CCD-Filterset

$379.00
SKU FLRGB-1 (Baader #2458472)
Filter size

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Description
  • 4 filters L-RGB
  • Ultra high contrast impermeable RGB-Filter, IR-blocked
  • NO halos, NO reflections, NO ghosting
  • Non-aging sealed coating edges

Simply put - Baader's new LRGBC anti-reflection filters deliver improved color separation and image quality without annoying halos. Unfortunately, their obvious improvements may cause many astro-imagers to re-take images of their favorite objects...

What makes the Baader filters so unique? Through an extensive coating stack design and testing program, Baader has partnered with the world's leading thin film coating company to produce transmission curves that border on the ideal. Their ultra steep cutoffs and high transmission (>95%) allowed Baader to do something to a degree no other RGB filter set can manage - they are able to effectively separate the important H-Beta and O-III lines. The Baader Blue filter passes virtually all of the H-Beta and O-III lines, while the Green filter is able to capture all of the O-III line, without encroaching into the H-Beta line. None of the light is wasted by either filter. In this way, O-III is represented as it should be, a teal (blue-green) color, and H-Beta is captured solely in the blue. Never before has this degree of separation been achieved, and with such high transmission of both lines.

In addition, the Green and Red filter passbands nearly touch, leaving only a sharp notch to block out the primary Mercury/Sodium light pollution line at 580nm. The high transmission everywhere else delivers the shortest combined exposures possible with every detector.

In addition to their special transmission properties, the Baader coatings were developed from the outset with another key goal in mind - eliminate the annoying reflections present in other astro-filters. To achieve this freedom from reflections required careful balancing of the coating stacks and further extensive testing. The result can be seen in these two images, showing the freedom from reflections in the L and C Filters (click on the image for a larger version). Image courtesy of Mr. Johannes Schedler.

The high optical quality of the Baader narrowband filters guarantees no loss in sharpness or contrast.  Each substrate is fine-optically polished plane parallel to deliver a smooth and accurate 1/4 wavefront over the entire surface.  Each filter is blocked and polished individually, not cut out of a larger plate of glass.  The special custom polishing operation sets Baader filters apart from the lower optical quality provided by standard commercially precision polished filter substrates used by most other filter manufacturers.

Coatings are professionally applied in Germany by the most sophisticated equipment available today, ensuring high consistency for bandpass cutoffs, transmission, and out of band blocking.  The anti-reflection coatings are evenly balanced on both sides of the filters to reduce surface stresses and prevent deformation of the substrates. The ultra-hard ionbeam deposition ensures the coatings will never degrade from use or normal cleaning.   Unlike many competitive filters, Baader coats each filter individually.  Baader filters remain sealed at their coating edges for a long life without degradation (you can see evidence of this process by inspecting for a thin un-coated region at the very edge of the filter).  Though more costly, this process avoids the coating failures that can result when filters are simply 'biscuit cut' from bulk coated sheet glass, leaving ragged coating edges for moisture to penetrate and cause coatings to peel away from the glass.  Baader filters are intended for a lifetime of real-world use.

 

Noted astro-imager, Johannes Schedler (Panther Observatory), found the Baader filters to be superb at capturing colors as well as freedom from reflections.

"I am more than satisfied with the performance of the new Baader filter set. The absence of any reflections from bright stars makes clean-up procedures obsolete for many objects displaying foreground stars. The simple 1:1:1 RGB weighting together with a distinct color separation supplies deep star colors and fine details in galaxies and nebulas."

(Rosette image taken with TEC-140, 10 minutes per color, courtesy of Mr. Johannes Schedler, Panther Observatory).


Why Baader Planetarium Filters?

Specifications

1.25"

MANUFACTURER Baader Planetarium
SKU (#) 2458472
EAN CODE 4047825021830
WEIGHT (KG) 0.236
TRANSMISSION RANGE multiple bands (see spectral image)
FILTER THICKNESS (WITHOUT CELL) 2 mm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 1 25 inch
FILTER USAGE CCD, Contrast Enhancement, Light Pollution Reduction, Luminance, RGB
FILTER MOUNTED Mounted (LPFC 6mm)
TYPE OF FILTER Bandpass
SINGLE OR SET? Filter-Set
FILTER SHAPE round

2"

MANUFACTURER Baader Planetarium
SKU (#) 2458477
EAN CODE 4047825021854
WEIGHT (KG) 0.26
TRANSMISSION RANGE multiple bands (see spectral image)
FILTER THICKNESS (WITHOUT CELL) 2 mm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 2 inch
FILTER USAGE CCD, Contrast Enhancement, Light Pollution Reduction, Luminance, RGB
FILTER MOUNTED Mounted (LPFC 6mm)
TYPE OF FILTER Bandpass
SINGLE OR SET? Filter-Set
FILTER SHAPE round

31mm

MANUFACTURER Baader Planetarium
SKU (#) 2458474
WEIGHT (KG) 0.104
TRANSMISSION RANGE multiple bands (see spectral image)
FILTER THICKNESS (WITHOUT CELL) 2 mm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 31 mm
FILTER USAGE Luminance, RGB
FILTER MOUNTED Unmounted
TYPE OF FILTER Bandpass
SINGLE OR SET? Filter-Set
FILTER SHAPE round

36mm

MANUFACTURER Baader Planetarium
SKU (#) 2459425
EAN CODE 4047825023872
WEIGHT (KG) 0.104
TRANSMISSION RANGE multiple bands (see spectral image)
FILTER THICKNESS (WITHOUT CELL) 2 mm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 36 mm
FILTER USAGE Luminance, RGB
FILTER MOUNTED Unmounted
TYPE OF FILTER Bandpass
SINGLE OR SET? Filter-Set
FILTER SHAPE round

50.4mm

MANUFACTURER Baader Planetarium
SKU (#) 2458482
EAN CODE 4047825021878
WEIGHT (KG) 0.28
COLOUR Black
TRANSMISSION RANGE multiple bands (see spectral image)
FILTER THICKNESS (WITHOUT CELL) 3 mm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 50.4 mm
FILTER USAGE CCD, Contrast Enhancement, Light Pollution Reduction, Luminance, RGB
FILTER MOUNTED Unmounted
TYPE OF FILTER Bandpass
SINGLE OR SET? Filter-Set
FILTER SHAPE round

50x50mm

MANUFACTURER Baader Planetarium
SKU (#) 2458487
EAN CODE 4047825021892
WEIGHT (KG) 0.292
COLOUR Black
TRANSMISSION RANGE multiple bands (see spectral image)
FILTER THICKNESS (WITHOUT CELL) 3 mm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 50 x 50 mm
FILTER USAGE CCD, Contrast Enhancement, Light Pollution Reduction, Luminance, RGB
FILTER MOUNTED Unmounted
TYPE OF FILTER Bandpass
SINGLE OR SET? Filter-Set
FILTER SHAPE square

65x65mm

MANUFACTURER Baader Planetarium
SKU (#) 2458492
EAN CODE 4047825023834
WEIGHT (KG) 0.348
COLOUR Black
TRANSMISSION RANGE multiple bands (see spectral image)
FILTER THICKNESS (WITHOUT CELL) 3 mm
AR-COATING dielectrically coated, planeoptically polished
FILTER SIZE 65 x 65 mm
FILTER USAGE CCD, Contrast Enhancement, Light Pollution Reduction, Luminance, RGB
FILTER MOUNTED Unmounted
TYPE OF FILTER Bandpass
SINGLE OR SET? Filter-Set
FILTER SHAPE square

 

Downloads

Baader LRGB Datasheet

FAQ - Problems with filters can have the strangest causes

Halos - No Problem!