Question about Coma.......

Has anyone made a visual comparison of the Lumicon Coma Corrector vs. the Paracorr. I am using an f/4.5 Newtonian and would like to remain at that focal ratio. The Lumicon does not increase the focal length.

Thanks in advance,
Jay Emirzian
8)

There were some threads about these two on CN a while ago. Several people reported that the Lumicon unit adds some spherical abberation. This was okay for photographic use, but made it undesirable for visual use, unless you have a slightly overcorrected primary (someone reported about some scopes that were intentionally made with a bit of overcorrection so they could be used with the LCC).

Jarad