Orion 5564 Users Manual

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instruction Manual
Luminance / IR
Cutoff Filter, 1.25"
#5564

IR-Cut Filter
Transmission
Spectrum

ULTRAVIOLET

VIOLET

400

The Orion Luminance/IR (infrared) Cutoff filter is a useful accessory
for any monochrome imaging system that does not feature an integrated infrared blocking filter. The filter has been designed to block all
infrared light with a wavelength above approximately 700 nanometers
(nm). Since monochrome CCD cameras are sensitive to all light, infrared light can contaminate digital images of the night sky by causing
image blurring, glare, abnormal color, reduced contrast, and bloated
stars. By preventing infrared light from being absorbed by an imaging
chip, the Luminance/IR Cutoff filter enables you to create images of
the highest quality and detail. Of course, if you wish to image the sky
in the infrared portion of the spectrum, make sure the filter is removed.
It is also a good idea to remove the Luminance/IR Cutoff if using a line
filter, such as an H-alpha line filter, as these generally have IR cutoff

BLUE

GREEN

500

YELLOW

ORANGE

RED

600
Wavelength (nm)

INFRARED

700

800

features built-in. The Luminance/IR Cutoff filter may interfere with the
performance of such line filters.
The Luminance/IR Cutoff filter is a dichroic filter design which features
multiple-layer coatings to ensure maximum transmission of desired
wavelength light, while reflecting unwanted infrared light completely.
Due to the dichroic design, the Luminance/IR Cutoff filter has a reflective appearance. Dichroic filters have hard microscopic layers of coating that do not fade significantly with proper care and usage.
In order to image through the Luminance/IR Cutoff filter you will need
to install it directly to your imaging camera. Install the filter by threading it onto the inserted “nosepiece” section of the imager. With the filter
installed, all light collected by the imager will be filtered appropriately.

One-Year Limited Warranty
This Orion Luminance/IR Cutoff Filter is warranted against defects in materials or workmanship for a period of one
year from the date of purchase. This warranty is for the benefit of the original retail purchaser only. During this warranty
period Orion Telescopes & Binoculars will repair or replace, at Orion’s option, any warranted instrument that proves to
be defective, provided it is returned postage paid to:
Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076.
This warranty specifically does not cover abuse, modification, mishandling, self-repair, or normal wear and tear (including mold growth).
If the product is not registered, proof of purchase (such as a copy of the original invoice) is required. This warranty
gives you specific legal rights, and you may also have other rights, which vary from state to state. For further warranty
service information, contact: Customer Service Department, Orion Telescopes.

Customer Support (800) 676-1343
E-mail: support@telescope.com
Corporate Offices (831) 763-7000

Providing Exceptional Consumer Optical Products Since 1975

89 Hangar Way, Watsonville, CA 95076

IN 322 Rev. B 02/09



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