The Astronomik CLS is a budget filter for visual observation, Black & White photography and CCD photographs of nebulae, galaxies and star clusters with astronomical instruments of any size.
We are proud to unveil the new Clip-Filter for the amazing Sony Alpha 7 series!
After a long period of prototyping and developmentwe are now able to offer you Clip-Filters for the amazing Sony Alpha bodies. The filters are held in place save and secure with no stress to the high quality glas and only minimal obstruction in the corners.
These Clip-Filters are designes and optimized to be used with normal lenses and with telescopes as well.
Compatibility: The Sony a7 Clip-Filters are sucessfully tested with all Sony Alpha 7 bodies (7, 7r and 7s in Mk I and MkII versions)
(We will test other/future models and add them here.),
NOTE: The filters are not suitable for Sony alpha 3000 to 6500 or Sony alpha NEX cameras.
Use Astronomik filters for your Sony Alpha 7 and enjoy marvelous images with an ultra light equipment!
The Astronomik CLS blocks the light of the spectral lines of mercury and sodium-vapor lamps and lets the largest part of the visible light and H-alpha emissions pass. All the important emission lines, as well as the spectral region that the very well dark adapted eye can see, can pass through the filter.
The filters are optimized for use with aperture ratios from 1:3 to 1:15. Transmission losses and chromatic distortions, which are problems with other filters, only appear with Astronomik filters when extremely bright aperture ratios of 1:2 and more are used. The CLS filter is suitable for use with telescopes of all aperture sizes.
Visual observation (dark skies): Good, to reduce light pollution by mercury-vapour lamps (streetlight)
Visual observation (urban skies): Good, an UHC-E or UHC filter is more suitable
Film photography: Very good, colour balance is near perfect
CCD photography: Good, when used with an additional IR-block-filter (!)
DSLR photography (astro modified): Very good, colour balance is near perfect
DSLR photography (MC modified): Good, when used with an additional IR-block-filter
DSLR photography (original): Good, colour balance shifted but contrast enhanced
Webcam / Video (Planets): Unsuitable
Webcam / Video (Deep Sky): Very good, if light pollution is a big problem
97% transmission at 656nm (H alpha)
92% transmission at 486nm (H-beta)
92% transmission at 496nm (OIII)
92% transmission at 501nm (OIII)
pass from 450 to 540nm and beyond 650nm
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