Guillermo - great idea and nice documentation on the method!
Gregg
At 10:05 PM 9/12/00 -0400, you wrote:
Hello all,
I just finished a small article on measuring pinholes by
using a scanner,
here is a link to it: http://members.home.com/penate/diameter.html
Guillermo
___
Hello all,
I just finished a small article on measuring pinholes by
using a scanner,
here is a link to it: http://members.home.com/penate/diameter.html
Guillermo
--- "G.Penate" wrote:
> Probably some of you are already doing the following, but it just occurred
> to me that a flat bed scanner can also be used to measure pinhole diameters.
> I just measured succesfuly a 0.012" pinhole diameter. My scanner is an "El
> Cheappo" UMAX scanner $60 and it was eno
- Original Message -
From: "Mike Keller"
> I tried that but wasn't sure I did it right. Care to elaborate on how you
> "measured?"
Sure, here is what you should do: Set your scanning to the highest optical
resolution (1200 in my case), scan the pinhole and then scan a transparent
ruler (
What a dam... good idea!!!
thanks
andy
-Original Message-
From: pinhole-discussion-admin@p at ???
[mailto:pinhole-discussion-admin@p at ???]On Behalf Of G.Penate
Sent: Tuesday, September 12, 2000 1:30 PM
To: pinhole-discussion@p at ???
Subject: Re: [pinhole-discussion] where 2
I tried that but wasn't sure I did it right. Care to elaborate on how you
"measured?"
Michael Keller
|-Original Message-
|From: G.Penate [mailto:pen...@home.com]
|Sent: Tuesday, September 12, 2000 1:30 PM
|To: pinhole-discussion@p at ???
|Subject: Re: [pinhole-disc
Probably some of you are already doing the following, but it just occurred
to me that a flat bed scanner can also be used to measure pinhole diameters.
I just measured succesfuly a 0.012" pinhole diameter. My scanner is an "El
Cheappo" UMAX scanner $60 and it was enough to do the job.
Guillermo
In a message dated 9/12/00 11:58:35 AM, pen...@home.com writes:
<< I get my needles from "The Dollar store" and they are very consistent from
where the tapering of tip starts to about where the needle's eye is (not that
it matters to me, tho, as I measure my pinholes and zone plates with a
micr
> By chance, I photographed a needle and projected it,
> only to find it had 2 different angles of taper and
> the diameter was different everywhere along the length
> of the needle! Checked a lot more needles and found the
> same thing. The question: where on the needle does the
> diameter from t
> On Tue, Sep 12, 2000, Kosinski Family wrote:
> > Pinhole wizards,
> > By chance, I photographed a needle and projected it, only to
> > find it had 2 different angles of taper and the diameter was
> > different everywhere along the length of the needle! Checked a
> > lot more needles and found the
On Tue, Sep 12, 2000, Kosinski Family wrote:
> Pinhole wizards,
> By chance, I photographed a needle and projected it, only to
> find it had 2 different angles of taper and the diameter was
> different everywhere along the length of the needle! Checked a
> lot more needles and found the same thing.
Pinhole wizards,
By chance, I photographed a needle and projected it, only to find it had 2
different angles of taper and the diameter was different everywhere along the
length of the needle! Checked a lot more needles and found the same thing. The
question: where on the needle does the diameter
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