Zone Plate lens or aperture was Re: Pictorico for Zone Plate

MessageMichael,

from what I've read so far about these zone plate, you have to focus your
camera and the resulting image is softer (fuzzyer) then with a strait
pinhole (aperture). Lets just say beside the exposure advantage of these the
rest is mostly a question of artistic licence if I can say that.

Since you have to focus a zone plate I would have no problem calling it a
lens. The usual pinhole aperture could probably be called a lens in the
theorical sense. Infinitely this, infinitely that, 0 this 0 that, etc. it's
kind of a singularity. I'm not a formalist, expert or anything else in these
matters but I wouldn't trash the "pinhole lens" expression just yet.

Regards
Yves

----- Original Message -----
From: Michael Koch-Schulte
To: alt-photo-process-l@sask.usask.ca
Sent: Tuesday, February 21, 2006 11:34 PM
Subject: Re: Pictorico for Zone Plate

If you define lens as a piece of glass no, but if you define it more
generally as something that can cause light to concentrate or diverge then
maybe yes. And yes I've been starting to design my own pinholes,
mega-pinholes and zone-plates with the very program you mentioned. The idea
came to mind when it was suggested that I use a film recorder or enlarger to
create the pinhole. I thought "why not just use Pictorico"? At 5760 DPI do
you think edges will be much of an influence? I'll know shortly.

~m

----- Original Message -----
From: Loris Medici
To: alt-photo-process-l@sask.usask.ca
Sent: Tuesday, February 21, 2006 12:02 AM
Subject: RE: Pictorico for Zone Plate

Lith film should be more suitable for that purpose (zone plate - Goggle for
the program "Pinhole Designer"; it gives you the possibility to design a
zone plate .pdf file that you can have it printed with a very high
resolution imagesetter at a service bureau). BTW, I never heard anything
such as a pinhole "lens" ;)

Regards,
Loris.
-----Original Message-----
From: Michael Koch-Schulte [mailto:mkochsch@shaw.ca]
Sent: 20 Şubat 2006 Pazartesi 23:37
To: alt-photo-process-l@sask.usask.ca
Subject: Pictorico for Zone Plate

Has anyone had success using Pictorico OHP to make Zone Plate or Pinhole
lenses?

~m
Received on Wed Feb 22 07:21:32 2006