These filters provide a natural color reproduction of planets, stars, emission- and reflection nebulas. The transmission properties of the L-RGB filters are optimized for CCD astrophotography. The set allows to take images in correct color for all types of objects. Where other brands make strange compromises, we do the best color reproduction possible. Both stars as well as objects that emit only in spectral lines, are reproduced in their true colors. You get CCD images with perfect colors, as if the objects where bright enough to be seen with photopic vision. This feature is the main difference between Astronomik filters an those of other manufacturers.
Astronomik 31 mm LRGB Filter Set
Mounted in Low Profile Non-Threaded Cell
The following aspects have been most important for the design of Astronomik LRGB filter set:
- Simple image processing for the user
- Highest transmission (nearly 100%) for short exposure times
- Adjusted transmissions of the individual filters for optimal colour reproduction
- Use of industry standards
Astronomik doesn;t stop thinking at the step of taking the picture. More important a tool should be given to the astrophotographers that offers a simple and elegant editing process. To maintain the color, they have calculated their filter set for the sRGB color space, that is used as an industry standard from most manufacturers of monitors, printers and imaging software. As a user you do not need to spend time to learn about colorimetry and color spaces. Astronomik has solved the special problems of astrophotography for you.
Due to the high-precision machining of the carrier substrate, our filters are parfocal with wedge errors below all usual margins. In order not to be the bottleneck in a high-quality optical system Astronomik filters are of course diffraction limited. Issues concerning focal distances as well as the exact location of the images of each color image are not a problem at all!
The L-RGB filter set divides the spectrum into its components red, green, blue and luminance. Thus color separation can be achieved with pure b/w CCD sensors. The separation corresponds to the color sensitivity of the human eye according to DIN 5032. By using the sRGB color space it is possible to maintain the color of the image throughout the entire image processing and output. With an Astronomik L-RGB filter set and your camera you create ideal raw material for image processing in the sRGB color space.
In combination with the Astronomik line filters your images will show interesting details of astronomical objects. For example, the red image can be enhanced by H-alpha or the green image by OIII. For planetary observation and photography the color filters are gladly "misused". ;)
Now Mounted in Low Profile Non-Threaded Cell
Sometimes unmounted filters can be hard to handle. The smaller diameters, such as those in this 31 mm LRGB filter set, can be especially difficult to pick up and insert or remove from the filter wheel, and that can lead to possible damage as well as unwanted reflections from incorrectly installed filters. Astronomik has solved this problem by mounting their 31 mm and 36 mm filters in a low profile (3 mm) non-threaded cell. O-rings, washers, or spacers are no longer required to hold the filter in place, and because the cell is only 3 mm thick, it works well in all appropriately sized filter wheels. Mounted 31 mm and 36 mm Astronomik filters will also play nice with unmounted versions in the same carousel.
Astronomik LRGB Filter Set - 31mm Round Mounted Features
- Parfocal with other Astronomik filters
- Glass thickness: 1mm
- Cell thickness: 3 mm
- Completely resistant against high humidity, scratches and aging effects
- Diffraction limited, the filter will not reduce the optical performance of your telescope!
- Astronomik filters are delivered in a high-quality, long lasting, filter box
- Additional Information
SKU AK-LRGB-31 Manufacturer Astronomik Type of Filter LRGB Filter Usage Imaging Single or Set? Filter Set Filter Size 31mm Filter Shape Round Filter Mounted? Mounted Warranty 10 Year Warranty
- Included Items
- Astronomik LRGB Filter Set - 31mm Round Mmounted
- 31mm round mounted red filter
- 31mm round mounted blue filter
- 31mm round mounted green filter
- 31mm round mounted L filter (UV & IR Cutoff)
- Questions & Answers
Product QuestionsI was under the impression that 31mm filters are all unmounted and that 1.25" filters are mounted. These are listed as 31mm but mounted. Will these work with a 31mm filter wheel like the ZWO's 5 position EFW?Question by: fz on Aug 25, 2016 12:21:00 AMThese filters behave like all other 31mm unmounted filters. They simply have a metal band around the edge so that the force from the retaining screws and washers is not directly against the glass filter. They will work in your filter wheel.Answer by: Chris Hendren (Admin) on Aug 30, 2016 5:09:00 PM
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