Re: Pinhole Light Meter

Good ideas George.

The only problem I would foresee with an IR filter less sensor is one of
calibration. Currently I calibrate the meter against a Gossen Starlite,
but hope, costs permitting to get it properly calibrated.

I do like the idea of allowing people to self source certain parts
though. 1.5 inch IR filters of the kind I use are very often used with
amature and professional astronomy

I think I have found someone for the first stage of testing. But I will
keep you in mind for any subsequent testing.

All the best

John

----- Original Message -----
From: "George L Smyth" <glsmyth@yahoo.com>
To: <pinhole-discussion@spitbite.org>
Sent: Sunday, August 06, 2006 6:24 AM
Subject: Re: [pinhole-discussion] Pinhole Light Meter

> --- John Fletcher <jfl10593@bigpond.net.au> wrote:
>
> [clip]
> > The biggest cost at the moment is the IR cut filter which you can
see on
> > top of the light sensor. It's a Sirius Optics NIR1 filter but the
Baader
> > UV/IR Cut Filter appears technically better. The IR cut filter
currently
> > costs US$59 with a US$20.00 adapter from
> > http://webcaddy.com.au/astro/adapter.asp. The light sensors I use
are
> > designed to function with the Hoya CM500 or Schott BG18 or BG39
filters
> > also. These make the light sensor's response similar to that of the
> > human eye / film. If anyone knows where I can get such a filter on
the
> > cheap that would greatly cut the overall cost.
> [clip]
>
> John -
>
> Have you considered leaving it out? The reason I say this is that I
> occasionally shoot infrared pinhole, so in those cases an ir filter
would be
> less than helpful. Perhaps offering it without, with an option to add
the
> filter up front at additional cost would be a possibility.
>
> If you're looking for someone to help test it and pay for the parts
then I'd be
> glad to raise my hand.
>
> Cheers -
>
> george
>
> -------------------------------------
>
> Eclectic Mix: http://EclecticMix.com
> DRiP Investing: http://DRiPInvesting.org
> Handmade Photographic Images: http://www.GLSmyth.com
> One Minute How-To: http://podcasternews.com/details.php?P=131
> _______________________________________________
> Post to the list as PLAIN TEXT only - no HTML
> pinhole-discussion mailing list
> pinhole-discussion@spitbite.org
> FAQ at http://spitbite.org/pinhole-discussion/list.html
_______________________________________________
Post to the list as PLAIN TEXT only - no HTML
pinhole-discussion mailing list
pinhole-discussion@spitbite.org
FAQ at http://spitbite.org/pinhole-discussion/list.html
Received on Sat Aug 5 20:56:04 2006