Baader Premium Eyepiece Filter: Blue, 470nm Bandpass - 2" # FCFB-2 2458313
Not just another colored filter! Finally, a set of serious tools for the planetary observer. Baader Planetarium's Premium Colored Filters bring a new level of quality and performance to planetary contrast enhancement.
Freedom from Ghost images, even when stacked. Striae-free substrates are polished parallel to 30 seconds of to avoid wedge errors. Finest 7-layer hard multicoatings on both faces feature 0.25% residual reflections (Baader filters are unique, no other colored filter incorporates anti-reflection multicoatings). The coatings are also different for each of the filters, in order to match the coating performance to the filter curve of each color. This maximizes the transmission and minimizes reflections.
Extremely High Transmissions result in maximum contrast and isolation of planetary details, even with smaller telescopes. Efficiencies of the three longpass filters (Red, Orange, and Yellow) peaks at 98%, and efficiencies of the three bandpass filters (Green, Blue, Dark Blue) achieve 70%.
Carefully designed spectral characteristics. Filters may be stacked without image degradation or ghosting, in order to provide even narrower passbands. Or, combine with any of the other Baader filters for interesting possibilities. For actual spectral traces, see Color Filter Transmission Curves.
No reduction in sharpness, even at high magnifications or when using the filter far ahead of the focal plane (ie, digital imaging, or in front of a diagonal or binoviewer).
Only one filter is needed for binoviewing. Only Baader colored filters have the optical quality necessary for use this far ahead of the focal plane.
Manufacturer part #: FCFB-2 or 2458313
Jun 2, 2016
Strong Construction,Lightweight,Quality Lenses,Easy to UseCons: Comments:
There is no filter exactly like the Baader 470 bandpass. It may seem that it would just be an expensive Wratten 80A. But the filter has a very unique color. Visually it is nothing like an 80A. There is not ghosting or glare introduced with the filter. All the Baader filters I have are excellent in that respect.Bottom Line: Would you recommend this item? Yes
I use this filter on the Moon. It gives the surface of the moon a very attractive blue color as opposed to the ghostly blue-white color you get with a Wratten 80A. So the Baader 470BP filter is great just to change things up looking at the Moon.
This review was provided courtesy of AgenaAstro.comSort by