Same thing as the Orion or Meade filter. The construction of the Celestron filter seems very good. It will improve contrast on most nebulae. Really bright objects like the Orion show more detail even with a small refractor. However, this filter will work best on a telescope with a large aperature. I initially tried it on a 3.5" scope. Although it improves contrast, it will also dim the image quite a bit in a small scope. Also keep in mind that these do not work with stars, clusters, or galaxies.

All in all, it does what is supposed to do. Operationally, it works pretty good. Value wise, this gets a bit trickier. At full retail price, I don't think this is worth it. Save your money and buy a good OIII filter. On the other hand, if you can pick up one of these things used, it may be worth it. I picked mine up from Astromart for a steal.

Overall Rating: 8
Optics:10 Value:7
Weight: 10
Date: 05/06/2002 07:21:57 pm PST

Replies: 0