Astronomik ProPlanet 742 Filter Clip-Filter Nikon XL

Clip Filter for Nikon full frame bodies

The filters are held in place save and secure with no stress to the high quality glass
The Clip-Filter are designed and optimized to be used with normal lenses and with telescopes as well.
Due to the very tight Nikon bajonett the clip-filters add a minimal obstruction at the edge of the field.

Compatibility:

• The Nikon XL-Clip Filter have been successfully tested with the D750, D800, D810 and the D850.
  For the D850, you can only use manual focus lenses or a T-adapter (with a telescope). With all lenses with electric contacts you will get an error message and the camera will not work.
  (Workaround for this: When using lenses with electric contacts on the D850 you can apply some tape over the lens contacts and the camera will work fine with the XL-Clip Filter installed.)
• Other bodies have not been tested yet.
• The Nikon XL-Clip will not work with cameras with APS-C sized sensors and not with the new mirrorless body. Clip-Filter for the APS-C sized models will be released in the near future.

A short guide selecting the right filter for you:
Lot´s of customers are overwhelmed by the vast number of filters offered by Astronomik. Due to that we give you a short guide how to select the right filter for your application below.

Our normal recommendation for the "First Filter" is the Astronomik CLS filter. The CLS blocks all unwanted artifical light pollution and natural airglow and gives you a dark background in your images. When using this filter you may expose much longer than without, so you will be able to pick much fainter structures and objects. The filter is designed in such a way that all objects are given in their natural colors. -They would look the same if your human eye would be much more sensitive!
Important: The standard CLS has no built-in IR-blocker. In case your camera has been modified for Astrophotography, please take the CLS-CCD which has a built-in IR-blocker!

The CLS is the fist choice for any applications like Night-scape photography and Time Lapse movies!

If you have to work under a heavy light polluted sky, the UHC is a good choice too: It´s transmission curve is very tight. It gives you the light from the Hß, OIII, H-alpha and SII lines in one single exposure. The reduction of light pollution is much stronger than the CLS/CLS-CCD, but the filter will work for gas nebulas only! Any galaxies and open or globular clusters are filtered out! You will get "false colors" with the UHC, no natural colors like the CLS/CLS-CCD.

If you want to die deeper into Astrophotography with your Sony, you should think about a set of emission line filters centered on OIII, H-alpha and SII. All three are available either with 12nm or 6nm bandwidth. With these filters you can do ultra-deep images even under the worst sky you can imagine plus the full moon high up in the sky! Imaging possibilties are nearly unlimited with these filters!
The emission line filters isolate the light from a very tight range of wavelengths. So you don´t get any color information! if you want to create color images (false color like images from the HST), you will need all three filters to mix the three channels into a final color image.
However the H-alpha filter is a great using it alone: Data can be processed to splendid greyscale images!

If you own a modified camera, you should consider the OWB filter: OWB is short for "Original white Balance", and that´s what the filter does: It gives you back the normal color reproduction from a un-modified camera. When using the OWB you may use your modified camera for normal daylight-photography again, without the need for color-correting each image afterwards!

Ideal filters for the reception of the moon and planets, notably Mars, with telescopes from 6" (150mm) aperture.

The ProPlanet IR 742 only allows infrared light with wavelengths of more than 742 nm to pass. In this wavelength range the effects of seeing are significantly lower than in the visible spectrum of the human eye. This allows much sharper images than are usually obtained from your device and location. Another advantage is that the sky background of advanced dawn is dark and so the filter even allows photography of the planets and the moon at daylight.

Main use

The Astronomik ProPlanet IR 742 cuts off the visible part of the spectrum and allows the light of wavelengths longer then 742nm to pass. Due to this behavior the part of the spectrum that is most sensitive to bad seeing is rejected. This approach does a big improvement to the imaging of planets and the moon. The image is more steady than the image in the visible light with nearly identical exposure times.

Other uses

• Besides astrophotography the filter allows you to get stunning results in nature photography. If an EOS-Clip Filter is used in an MC modified DSLR you get tremendous results imaging the flora. The filter cuts off the part of the spectrum where Chlorophyll looks green and shows its high reflectivety in the near infrared. If trees are photographed in spring and summer under blue skies you get stunning images with white trees and clouds in front of a near black background.
• Darkens the background during twilight.
• Imaging of bright planets, stars and comets by day.
• Imaging of young stars in dust clouds and stellar nurseries.

Alternatives

When the seeing is very bad and the instrument is 10" (250 mm) or larger, the Astronomik ProPlanet IR 807 may be the better choice.

Suitability

• Visual observation (dark skies): Unsuitable, the eye is insensitive at this spectrum
• Visual observation (urban skies): Unsuitable, the eye is insensitive at this spectrum
• Film photography: It depends,
• CCD photography: Reasonable, for special IR photography (as chlorophyll)
• DSLR photography (original): Unsuitable
• DSLR photography (astro modified): Unsuitable
• DSLR photography (MC modified): Very good, for IR daylight photography
• Webcam / Video (Planets): Very good, rejects problems with seeing
• Webcam / Video (Deep Sky): Very good, rejects problems with seeing

Technical Data

• more then 96% transmission for wavelengths of 742nm to 1100nm
• blocking of wavelengths between 350nm and 730nm
• Parfocal with other Astronomik filters
• Glass thickness: 1mm
• 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
• Since 2008 we do ship filters with a completely new design. Any kind of halo or strange reflection is a matter of past