) or simply because there was no actual image in the
submission, in which case the participant was notified and invited to
re-submit the image.
Guillermo
be combined into 1 single formula, but at this point of the night
my brain cells are not functioning quite well, so I better hit the pillow.
Mike Healy
Tempe (110 degrees in the shade), AZ
Guillermo
(my tomato plants almost die last nite when temp went around freezing mark)
(It will be warmer tonite
- Original Message -
From: Michael Healy mjhe...@kcnet.com
Say, Guillermo. The local supermarkets are packaging four bell peppers
together now in special clear plastic bags. You get a green one, a yellow
one, a red one, and an orange one. Think you could make a pinhole happen
measure the pinhole directly
on the screen with that digital tool.
http://members.rogers.com/penate/diameter.htm
and made three exposures. I'm just about to develop them ...
Let us know how they turned out.
Welcome to the list.
Guillermo
to enlarge paper negatives (any size)
regularly, I'd rather shoot paper the size of the intended final print and
contact print them after.
Guillermo
.
Guillermo
the shutter of the Lubitel. I haven't used a
P67.
Guillermo
other regions and
probably half way to boiling temperature in many parts of the southern
hemisphere. End of April represent a compromise, when the northern
hemisphere is in spring and the southern one is in autumn.
Guillermo (speaking for myself)
Who can't plant flowers outside in the flower bed
or if I
you have the money, get a 4x5 Shen-Hao http://www.shen-hao.com it sells for
$625 at http://www.badgergraphic.com/search_product2.asp?x=2594 (a steal at
that price) and if later you want to do glass lens 4x5 you just get the
lens.
Guillermo
.
Guillermo
wouldn't mind a delay of 1 week for that wish to come true
:-)
I am going to say it the way I'd say it in Spanish:
Happy Holy week, everybody.
Guillermo
diagram on paper.
Forgot the formulas, tell me if you really need them.
Guillermo
than fractional, the wise thing to do is to
approximate f/160 to the next smallest full stop, f/180 in this case.
Guillermo
a very ingenious camera you have made, if I were not an I
gotta made or modify the pinhole cameras I use kind of guy, I'd have placed
an order already. I very much like the images, especially Mia's House,
outstanding!!.
Guillermo
- Original Message -
From: George L Smyth glsm...@myway.com
the lens, install a pinhole, reload the
camera with the film, which has to be done under darkroom conditions.
Guillermo
- Original Message -
From: D. Hill zopp...@yahoo.com
You do not need a special drill bit - just one that
isn't too big, nor too small - anything 1/8 inch and
smaller
exposure and/or manual focusing.
Guillermo
^0.25]
Angle = ArcCosine [0.70710678]
Angle = 45 degrees
Guillermo
=
height of film, the formula becomes:
http://members.rogers.com/gpenate/stopsWH.gif
Correction welcomed.
Guillermo
buy or use a camera from that company,
reasons are obvious.
Guillermo
in wierdness, came out to
comment!). Now, given that an airgun bb has a diameter of .175,
we'll need Guillermo to tell us how far apart the inner sides of the
box need to be.
Without taking my trusty slide ruler out to make the calculation, I can tell
you it would need to be like the mother
- Original Message -
From: George glsm...@myway.com
Did they include a URL? I didn't see anything on their site (I think I
was looking at their site).
http://www.freestylephoto.biz/clearance.php?wcat=99
Guillermo
- Original Message -
From: Michael Healy mjhe...@kcnet.com
I imagine half a case of Home Depot toilet paper.
Ow yes... Don't get Linagraph Direct paper... (Cat 198 6520) ... it
doesn't
appear to be sensitive to White light at all...man do I have a bunch
too...
it comes in 12x400'
to your finding of 1.25), but since it this result is smaller,
you have to use the larger one of 43.33mm, which is equal to just above 1.7
All the above could have been explained fast and nice with a simple drawing,
but this is just an ascii posts only list.
Guillermo
- Original Message
- Original Message -
From: HypoBob hypo...@pacbell.net
Guillermo,
In a posting on 13 December you stated that an 8x10 pinhole image rivaling
the resolution of a lens image (i.e., 5 lp/mm) could be obtained with a
focal length of 120 mm or less and the optimum pinhole.
Since one
and
although I don't use it to make my pinholes, I have used it and works
beautifully for that purpose.
Guillermo
a rectangle 0.3 by 0.4 inches of the total area of the film, it is
the equivalent of enlarging your 5x7 to 80x114 inches size.
Guillermo
it is called Holiday tree!. Anyway, as I said, I was roasting
these chestnuts on an open fire, when the line just came to me!! in part
for the above in part 'cause I thought I could used the shell of a chestnut
to make a pinhole camera. :-)
Guillermo
Though its been said many times, many ways Merry Christmas to (all of) you!
Guillermo
Sieves and
Pinhole Sieves to the offering, wait for an announcement on this.
Guillermo
- Original Message -
From: Guillermo pen...@rogers.com
As we all know pinhole is not about sharpness, nor I am suggesting we
strive
for it. Having said that, it is actually possible to make poinhole images
that under certain conditions could be undistinguishable from glass lens
any interest in them selling
it.
Guillermo
Ok, I get it, digital stuff is just another way of doing it,as for the
real question: Is it art?
Just kidding people, just kidding :-)
- Original Message -
From: Dan Gerber dger...@adobe.com
Seriously, I spent almost every waking hour of my 4 years of college in
the
darkroom, and yet now, when I own a home with a lovely space for a
darkroom,
and all of the equipment I need(x2!) I don't have a darkroom! Why? Because
I
and wanted to know
more.
Guillermo
, I should have pointed to the HOME page instead, in it Joaquin
mentions: This is just an exerpt from
our new Website,which will be published soon.
About the cost, I wonder about that myself, I am pretty sure it'd be an as
handsome sum as the cameras themselves.
Guillermo
Joaquin Casado, maker of the handsome 4x5 Hal Camera has know pre-announced
the beautiful Curva120, as the name implies, it is a curved film plane
taking 120 film. Incredible design. Take a look:
http://usuarios.lycos.es/jsendec/curva_english.htm
Guillermo
- Original Message -
From: Jeff Dilcher r...@hiddenworld.net
Looks like a light leak. I think Holga owners considers that a feature
and not a problem! There is a reason these cameras were (originally)
inexpensive...
Some Holga aficionados would kill for a Holga with that problem.
for longer than what the reciprocal relationship is telling you.
Each film has its own characteristics, therefore, each film FAILS in a
different way.
Guillermo
telling us the
optimal pinhole formula should be D= SQRT (2.44 * Lambda * F) , the SQRT(1
/ M+1 ) factor is a sort of bellows factor as I explained it in a post
back in Oct last year:
http://www.pairlist.net/mailman/private/pinhole-discussion/2001-October/0042
23.html
Guillermo
we are willing to tolerate. Those 3X or 3.5X the focal length
coverage mentioned everwhere, have no meaning whatsoever, IMO.
Guillermo
in the way. You could
check for mechanical vignetting by opening the rear and aiming the camera to
a bright light while having your eye, the corner of the opening (6x6) and
the pinhole line up, if you can't see light coming in thru the pinhole, then
you have vignetting.
Guillermo
categories of archived messages: those posted previous to 08/22/2000 and
those posted after. The former are easier to search than the latter,
unfortunately.
Guillermo
/~holder/SX70.html
Guillermo
the light
always falls perpendicular to the film so it doesn't have to cover more area
(as explained above).
Something else that contributes to a fall-off is the thickness of the
material the pinhole is made of and whether it has burrs around its edges.
Guillermo
- Original Message -
From
p.m.
Guillermo
/math/leastsquares/lstsqrmdcurve.cfm , for those of us
confused by the above, using a program like WinCurveFit
http://www.krs.com.au/wcf.html is a good thing, that is what I used to
give you the answer BTW.
Guillermo
.
Guillermo
Stanford is incorrectly spelled, it should be STANFORD not STANDFORD.
Guillermo
- Original Message -
From: John Fisher photobu...@hotmail.com
Would you check the URL? I have tried to open the site.But haven't had any
luck. thank you
From: Paul Prober pro...@silcom.com
Reply
- Original Message -
From: Guillermo pen...@rogers.com
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
- Original Message -
From: Beaker mbea...@mac.com
Guillermo- how do you figure out the aperture of a zone plate? Mr.
Pinhole mentions this formula: radius = sqrt(wavelength *
focallength * ring). I was guessing that this would give a good number
to start with. Is this a good guess
it in front of the pinhole
and keep moving it for the duration of the exposure. The larger the filter
the easier this is done.
Guillermo
be joining you,
nevertheless I recognize this as a good chance for those that have not
experimented zoneplate photography to try it with very minimum investment
and help you share the cost in the process, a win/win scenario if you ask
me.
Good luck.
Guillermo
Photography Day http://www.pinholeday.org/
Guillermo
David,
Great site and above all, outstanding and functional tool you are
making available, I am talking about the PinholeDesigner, of course. Later
I will pay your site a more thorough visit and let you know any other
comment I have.
Thanks.
Guillermo
- Original Message
.
I bought a wooden homegrown 11x14 spring back with GG, but have not been
able to locate a holder for it, yet. I could let that spring back go for a
price but that back is a bit bigger! than what you are looking for.
Guillermo
if the book is indeed online?
Longtime ago I downloaded the book (lots of htmls and gifs) and have it in
my disk drive, it is about 1.5MB ZIP compressed. There is also a PDF
version here http://www.ushist.com/props/inc/albumen_salted_paper_reilly.pdf
Guillermo
to my email address pen...@rogers.com
Guillermo
is the degree of enlargement and I'd add, the
resolution you start with.
Guillermo
or not after enlarging it. The pinhole size, btw,
was optimum for the focal length of that camera.
Guillermo
example of those
kinds of films.
BTW, Michael, what about renting a Pol 550 back for a day and shooting away
as if there is no tomorrow, until all boxes are gone!!
Guillermo
Michael,
This site may help you understand how a Polaroid pack works:
http://www.theskeltons.org/polaroids/film.htm
Guillermo
- Original Message -
From: michael_georg...@trendmicro.com
Anyone have any experience with the mechanics of Polaroid pack film?
= So, here I am
paper, glossy paper would give better results I'd assume. BTW,
focusing on the grain of the photo paper was absolutely not a problem, it
was very much like focusing on film grain.
Never enlarged paper before, it is definitely doable.
Guillermo
and very IN with the so called ART
communitynevertheless, I still is hard to understand that price for it!!
Guillermo
- Original Message -
From: Richard M. Koolish kool...@bbn.com
I'm not sure I would describe the workings of a zone plate this way.
It
doesn't matter where in the zone plate (or pinhole) the light passes
through. It doesn't bend at one place and not in another. The way
you
...@members.home.com/penate/cameras/6x6.jpg
Hope it answers your questions.
Guillermo
edges compared with analog made ZPs, that may or may not have any
consecuences on the final image they produce. And no, I don't think a
consumer or low end comercial printer would work. Should you find the
opposite, let us know, pls.
Guillermo
on 616 is an option.
too.
Guillermo
by the other slit not just overlaps the former
but happens to be at its lowest peak (-), the net effect is darkness, light
from one slit canceling out with light from the other slit, weird, eh? This
BTW, is called Destructive Interference.
Guillermo
to
point me to an English translation of the info .pdf the pricing isn't
too bad.
There is this within-same-continent alternative. also:
http://www.frugalphotographer.com/index.htm
They even have 126 film for a quick pinhole camera set-up.
Guillermo
Oracle.
It also NOW is used as a shout of joy, perhaps in a similar way you would
say HURRA.
Guillermo
for it.
Willkommen zurück zu der pinhole liste
Guillermo
?
Only when I have WY too much time!
:-))
Guillermo
when I don't have WAAAY too much time in
my hands, so answers are as un-prolific as possible.
Guillermo
://rmp.opusis.com/mailman/listinfo/cameramakers
Guillermo
, but noticed he continues to send
empty messages.
He's also sending blank msgs to the cameramakers list, also
and lots of them!
Guillermo
progression that make the f/stops increase by a
factor of square root of 2
Need a more complete explanation? let me know.
Guillermo
. If your camera has GG,
remove it an install a piece of clear glass, this will allow you to rest the
loupe steady, otherwise, you will have to rely on your steady hand.
Again, you will probably be surpriced of what you see.
Guillermo
camera to a light source
(light bulb for instance) or well illuminated object and focus on the aerial
image, rather than on the ground glass. You will be surprised how good is
the image a ZP produces. And yes, use a loupe.
Guillermo
be sufficient to get good results.
BTW, I don't think making ZP faster than f/64 is a good thing. A f/32 ZP
would require a large number of rings/zones and that augments the
noise/signal ratio considerably. For instance, a 90mm ZP f/32 would need 79
rings/zones (total), f/64 would just need 19.
Guillermo
- Original Message -
From: Gregg Kemp gregg.kemp@???
Guillermo, I don't remember ever seeing your correction formula before.
Is
that theoretical, or have you tested it?
Theoretical, Gregg, as I haven't done any close up work myself.
For those (few) people interested in were
)
where O = distance pinhole lens to object being photographed
and I = distance pinhole lens to film
SQRT stands for square root of
Guillermo
- Original Message -
From: Kosinski Family zin...@telenet.net
Guy's the GUY!
best of luck
He'll surely need it to deal with us bunch of trouble people!
BTW, there are some names I am sure not everybody nows how to pronounce
them, like mine for instance:
Guillermo is pronounced Gih
- Original Message -
From: Eric S. Theise mat...@cyberwerks.com
I'm a sysadmin and web designer and yes I use vi
Here is for all of you VI lovers:
(will never do it again Gregg, I promise!)
ADICTED TO VI
You press the keys with no effect,
Your mode is not correct.
The screen
system. Read about Piezography from the horse's mouth at
piezography.com
Guillermo
, but the link
to
his email address does not seem to work.
Lukas, the links for ORDER and CONTACT have not been coded properly.
His/her email address seems to be i...@pinhole-photo.com give it a try.
Guillermo
lots of it with a simple cardboard box, why shouldn't we!
I don't know if it hapens to you guys/gals, but when my wife see me seeing
any container for more than few seconds she ask me: Another pinhole camera,
eh? (not that she minds :-).
Guillermo
://www.popularwoodworking.com/features/fea.asp?id=1048
Guillermo
development later
on ? Thank you for any help.
You got me here, my guess is that reciprocity may be close to what for
ilford paper emulsion is, but that is just a guess.
Guillermo
is very fuzzy, but I am interested in recognizing
shapes not in details.
Guillermo
. Nevertheless, I'd like to tell my
Japanese friends or anybody else: Whenever in doubt, Go for it!, I don't
have doubts, though!.
Guillermo
it the web wonderful!!
Guillermo
- Original Message -
From: Marcy Merrill ma...@merrillphoto.com
made over one hundred Pintoids.
I knew about people eating Quaker cereal like crazy to have pinhole camera
material, but 100 Altoid boxes is a lot of mint!
:-)
Guillermo
- Original Message -
From: Guy Glorieux guy.glori...@sympatico.ca
For anyone interested in really-large format pinhole camera making,
there is a 20x24 bellows for sale on eBay. (US only)
Current bid is at $66.00...
This beats you 6x9 format, Guillermo! ...-:))
You won't believe
- Original Message -
From: Guy Glorieux guy.glori...@sympatico.ca
http://members.home.com/penate/cameras/6x6.jpg
Nice piece, Guillermo. How does 36mm on 6x6 compare with 35mm format
focals?
Would it be around 20mm?
That is correct. (18.35mm to be more exact).
I like the way
it into a pinhole camera.
Guillermo
, you'll have to define what
good is for you, first.
Guillermo
- Original Message -
From: ethereal art ethereal...@mindspring.com
Since the Zero 2000 is made in Japan
In the Hong Kong prefecture, to be more exact!!
;-)
Guillermo
that distance everytime after. If you want to focus a
zoneplate, is almost a must to do it viewing the aerial image and not the
GG. BTW, you'll probably be amazed at how nice the aerial image projected
by a zoneplate looks.
Guillermo
\+/
|/ \ ^
| / \ / \
|/ \
\
F
One of the best ASCII art I ever seen! undoubtedly has Cubism influence.
:-)
Guillermo
you better
reciprocity corrections than trial and error.
Hope it helps.
Guillermo
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