[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: [ATM] Polarizing filters versus neutral density filters

John
  The variable polarizer filter can be rotated to give you 15- 80% 
reduction , as opposed to a set density of the ND filters

John Lynch wrote:

>To the ATM group:
>
>Could someone please explain the advantages of using
>either a polarizing filter or the neutral density
>filter
>for lunar observations?  I have a single polarizing
>filter which is advertised to reduce the intensity by
>a factor of 3.  How would this differ from a neutral
>density filter that transmits, say, 25%?
>
>Thanks.
>
>John Lynch
>
>
> 
>____________________________________________________________________________________
>Sponsored Link
>
>Degrees online in as fast as 1 Yr
>MBA, Bachelor's, Master's, Assoc
>http://yahoo.degrees.info
>_______________________________________________
>ATM mailing list http://www.atmlist.net/
>
>
>  
>
_______________________________________________
ATM mailing list http://www.atmlist.net/