[OM] Skylight filter improves 180/2.8???

[Bernard Frangoulis]

While looking for info on the possibility to use the 180/2.8 with the 
2x-A teleconverter, I inadvertently found this piece of advice by 
Michael Covington:
> I have even found lenses that become *sharper* when you add a 1A or 1B
> filter, because they have chromatic aberration in the deep violet and the
> filter eliminates the short-wavelength rays that are not focused correctly.
> I'm talking about good lenses, such as the Olympus Zuiko 180/2.8, not
> cheapies.
http://groups.google.fr/groups?q=180+zuiko+filter+covington&hl=fr&lr=&ie=UTF-8&selm=81gplt
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                                                                                    
                                        tp9.atl.mindspring.net&rnum=1

Never tried this. What do you think?

Bernard

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