Optolong LRGB Filter set - 1.25Inch

Optolong LRGB Filter set - 1.25Inch

 1.  Optolong LRGB Introduction

Optolong LRGB filter set is designed for maximum contrast and with extremely high gradients for clear differentiation of colors. The LRGB filter set divides the spectrum into its components red, green, blue and luminance.

OIII emission overlaps on blue and green filters with maximum transmission to allow high efficiency and natural color imaging. Gap between green and red filters serves to block out the primary Sodium light pollution line at 589nm and improves color balance and separation.

Main Use

Work well with debayered monochrome CCD cameras.

Suitable for deepsky and planetary CCD imaging.

RGB-imaging allows equal weighting factors for each channel, very important for automated imaging.

The ideal raw material for image processing in the sRGB color space is available with LRGB filter set and mono CCD camera.

WARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.

2. Optolong LRGB Spectrum and Characteristic
Sbustrate: B270
Thickness: 1.85mm
Tave:  T>90%
Blocking range: 350-1050nm
Blcoking depth: light pollution  line blocking >99%
Surface quality: 60/40
Transmitted Wavefront RMS: ?/4
 Parallelism: 30s

How to read the chart?

?The horizontal axis is the Wavelength in Nanometers(nm).

?The vertical axis is transmission in %.

?The WHITE line shows the transmission of the L-CCD filter. R-CCD filter line is shown in RED. G-CCD filter line is shown in GREEN. And the B-CCD line is show in BLUE.

REVIEW of Optolong LRGB Filter Set - 1.25Inch 👇

3. Coating Technology

·Multi-layers anti-reflection coating

·Non-cementing optical substrate coating

·Optolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.

·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.