Re: [ATM] Wratten #3N5 filter

[Bill Prewitt <bprewitt@neo.rr.com>]

It's a neutral density filter.
You could use it for the moon.

For photography, you might need a neutral density filter if you wanted 
to use a very wide aperture for a narrow focus effect, or a very long 
exposure to get motion blur.

hermit wrote:
> John Lynch wrote:
>> To the list:
>>
>> Could someone please tell me what the Wratten #3N5
>> filter is relative to the other dye in gel filters
>> that come in various colors (Wratten numbers).  And,
>> what would be the use of the #3N5?
>>
>> Thanks.
>>
>> John Lynch
>>   
> Geez.  I thought a quick Google would turn this one up.   What color 
> does it 'appear' to be?  I see it under Questar accessories.  Kodak now 
> uses Tiffan for it's filters.  I've poked around their site but cannot 
> find a listing for that one.
> 
> Ken Lowther
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> 

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