Product Overview
The Optolong H-Alpha 7nm is a very narrow emission-line filter that works by permitting a 7nm bandwidth of light, focused on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths. Wavelengths that are in charge of natural light pollution, or skyglow, are radically decreased, as is artificial light pollution brought about by high and low pressure sodium and mercury vapor lights. The outcome is a high contrast image that uncovers the H-alpha line in all its brilliance.
This Optolong H-Alpha EOS APS Clip filter will give a well defined contrast between the skyglow background and H-alpha transmitting objects, but since it has a FWHM of only 7nm, you won't see the same number of stars in the last picture as you would with the Optolong 12nm H-Alpha Filter.
The Optolong EOS APS H-Alpha 7nm Filter is made with Schott glass that has been multi-coated with ion-assisted deposition technology to guarantee scratch resistance and soundness on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and finally laser engraved.
Not Compatible with EF-S lenses
Specifications
WARNING: Optolong filters are not designed for direct solar observation. NEVER use these filters for observing or imaging the Sun, or permanent eye and equipment damage will result.
Compatibility List:
Warning: The use of EOS-C clip filters is not possible when using Canon EF-S lenses.
This filter will/will not work with the following camera models:
- Canon 450D Rebel XSi Yes
- Canon Digital Rebel XS (digital) Yes
- Canon Digital Rebel XSi Yes
- Canon EOS 1000D Yes
- Canon EOS 450D No
- Canon EOS 500D Yes
- Canon EOS Kiss F Yes
- Canon EOS Kiss X2 Yes
- Canon EOS Kiss X3 Yes
- Canon EOS Rebel T1i Yes
- Canon EOS 60D + 60Da Yes
- Canon EOS 7D Yes
- Canon EOS 70D Yes
- Canon EOS 77D No
- Canon EOS 50D Yes
- Canon EOS 650D Yes
- Canon EOS 600D Yes
- Canon EOS 550D. Yes
- Canon EOS 700D Yes
- Canon EOS 1100D Yes
- Canon EOS 1200D Yes
- Canon EOS 40D Yes
- Canon EOS 30D Yes
- Canon EOS 20D Yes
- Canon EOS 10D Yes
- Canon EOS D60 Yes
- Canon EOS D30 Yes
