Telescopes Canada will be closed for shipping and pick-up orders from Friday June 24th to Monday June 27th inclusive. Online orders will still be accepted as per normal and will be shipped Tuesday June 28th. Technical support will continue to be available.
NOTE: Some manufacturer back order lead times are longer than usual. Please ask us regarding specific products.
The OWB filter would usually not be designated as an "astronomical" filter. The intention is to enable converted DSLR cameras (without inbuilt IR-filter) to be used for 'terrestrial' photography again.
The OWB (Original White Balance) filter shifts the complete spectrum of a converted DSLR in such a manner that the camera will not be exclusively usable for astro-photography. Therefore the decision whether to permanently alter a DSLR in order to exclusively use it for astronomical tasks or accept the lower sensitivity on the red end of the spectrum it is now a thing of the past.
The OWB filter is available as a Clip-Filter for cameras used for astrophotography.
DSLR cameras which have been converted for astronomical use by removing the inbuilt IR-filter or by substituting it with a filter with greater range for H-alpha, have a white balance that make them unusable for 'terrestrial' purpose. The spectral sensitivity of the DSLR will be changed by an OWB-Filter to the former range. In other words, the OWB pretends to be the conventional built-in filter!
Visual observation (dark skies): Unsuitable
Visual observation (urban skies): Unsuitable
Film photography: Unsuitable
CCD photography: Unsuitable
DSLR photography (original): Unsuitable
DSLR photography (astro modified): Very good, achieves a standard white balance for 'terrestrial' photography
DSLR photography (MC modified): Very good, achieves a standard white balance for 'terrestrial' photography
Webcam / Video (Planets): Unsuitable
Webcam / Video (Deep Sky): Unsuitable
Special spectrum in order to adapt modified DSLR cameras (removed or substituted inbuilt IR-filter) to achieve standard colour space in digital imaging.
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