want
because this sounds like a great way to get into zone for not a ton of
money. Thanks again, Thom
tjmi...@ix.netcom.com
- Original Message -
From: "Beaker"
To:
Sent: Thursday, October 24, 2002 11:24 PM
Subject: Re: [pinhole-discussion] Zone plates for a body cap
Just got
On Friday, October 25, 2002, at 04:21 PM, Guillermo wrote:
- Original Message -
From: "Guillermo"
I gather that by "aperture of the zone plate" you mean the size of
each of
the rings. Mr.Pinhole formula is what the scientific community uses
for
their high-tech uses of zone plates
- Original Message -
From: "Guillermo"
>
> I gather that by "aperture of the zone plate" you mean the size of each of
> the rings. Mr.Pinhole formula is what the scientific community uses for
> their high-tech uses of zone plates and my non-scientific tests (focusing
> aerial images produ
- Original Message -
From: "Beaker"
> Guillermo- how do you figure out the aperture of a zone plate? Mr.
> Pinhole mentions this formula:focallength * ring)>. I was guessing that this would give a good number
> to start with. Is this a good guess?
I gather that by "aperture of the zo
on of
money. Thanks again, Thom
tjmi...@ix.netcom.com
- Original Message -
From: "Beaker"
To:
Sent: Thursday, October 24, 2002 11:24 PM
Subject: Re: [pinhole-discussion] Zone plates for a body cap
>
> On Thursday, October 24, 2002, at 10:28 PM, Guillermo wrote:
>
> &
On Thursday, October 24, 2002, at 10:28 PM, Guillermo wrote:
- Original Message -
From: "Beaker"
I'm thinking of getting a sheet of Zone Plates made for a Pentax K
mount body cap (optimized for 43 mm). Would anyone be interested in
buying any? The reason I ask, the negative will cost
ust a pressure fit, and I am afraid it would come off really easily
or leak
light.
John
- Original Message -
From: "Beaker"
To:
Sent: Thursday, October 24, 2002 6:39 PM
Subject: [pinhole-discussion] Zone plates for a body cap
Hi-
I'm thinking of getting a sheet of Zo
- Original Message -
From: "Beaker"
> I'm thinking of getting a sheet of Zone Plates made for a Pentax K
> mount body cap (optimized for 43 mm). Would anyone be interested in
> buying any? The reason I ask, the negative will cost something like $50
> to $75, (the shop has a $50 minimum.)
Does the pentax K body cap lock into the bayonet mount? The one I have is
just a pressure fit, and I am afraid it would come off really easily or leak
light.
John
- Original Message -
From: "Beaker"
To:
Sent: Thursday, October 24, 2002 6:39 PM
Subject: [pinhole-discussion] Z
Hi-
I'm thinking of getting a sheet of Zone Plates made for a Pentax K
mount body cap (optimized for 43 mm). Would anyone be interested in
buying any? The reason I ask, the negative will cost something like $50
to $75, (the shop has a $50 minimum.) and I would like to spread the
cost out a li
10 matches
Mail list logo
