Re: [APML] IDAS LPS filter & Provia 400F

["Chris & Jennifer Cook" <ccjd@ix.netcom.com>]

Thanks John and Alson.  I'll experiment in the 1.5 range and see what
happens.

Chris


==================
Chris Cook
Astronomical Photography
www.abmedia.com/astro


-----Original Message-----
From: John Boudreau <jeboud@attbi.com>
To: astro-photo@seds.org <astro-photo@seds.org>
Date: Tuesday, July 09, 2002 8:27 PM
Subject: Re: [APML] IDAS LPS filter & Provia 400F


>Hi Chris,
>
>I have tried 400F and the IDAS filter, but unfortunately hazy conditions
>compromised the results. I've shoot much more of the 100F with this filter,
>and generally figure on a factor of 1.5x. I think you'd be safe anywhere
>from 1.5 to 1.7 from your _new_location ;o)
>
>John Boudreau
>jeboud@attbi.com
>http://home.attbi.com/~jeboud/astro.htm
>
>----- Original Message -----
>From: "Chris & Jennifer Cook" <ccjd@ix.netcom.com>
>To: <astro-photo@seds.org>
>Sent: Wednesday, July 10, 2002 1:18 AM
>Subject: [APML] IDAS LPS filter & Provia 400F
>
>
>> Hi all -
>>
>> Has anyone tried this combination?
>> Also, for those of you that use the IDAS LPS filter, what is the filter
>> factor?  I'll be shooting at f/6.9.
>>
>> Chris
>>
>>
>> ==================
>> Chris Cook
>> Astronomical Photography
>> www.abmedia.com/astro
>>
>>
>>
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>
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