So who's going to be the first one to make a camera out of the altoid strips
cans?
John
- Original Message -
From: Marcy Merrill ma...@merrillphoto.com
To: Pinhole-Discussion@p at ???
Sent: Thursday, April 17, 2003 11:19 AM
Subject: [pinhole-discussion] going in circles
Here's a
If you have a rubber eye cap, you can usually see a faint image through the
viewfinder depending on the brightness of the scene.
John
- Original Message -
From: Jeff dilc...@hiddenworld.net
To: pinhole-discussion@p at ???
Sent: Sunday, March 23, 2003 4:04 PM
Subject: Re:
That's not supposed to happen... there's something wrong with your computer.
Thanks for posting this nick, I got the photocopy from John Ptak, but the
PDF is also handy to have.
John
.
- Original Message -
From: js...@aol.com
To: pinhole-discussion@p at ???
Sent: Friday, February 21,
Cooltone and MG paper developer works fine. You will be waiting a looonggg
time for the paper to develop in film developer unless you use insanely
concentrated stuff.
John
- Original Message -
From: Bob Arnott b...@bobarnott.com
To: Pinhole Discussion pinhole-discussion@p at ???
John,
I would appreciate a copy. I tried emailing you directly, but it bounced
back. I'll send off an 8x10 SASE with a few dollars to cover reproduction
costs.
Thanks,
John Yeo
--
http://www.enteric.org
- Original Message -
From: John F. Ptak 3legskil...@thesciencebookstore.com
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 mbea...@mac.com
To: pinhole-discussion@p at ???
Sent: Thursday, October 24, 2002 6:39
This is a little off topic, as it doesn't relate directly to pinhole, but
many members of this list have websites exhibiting their work, so I decided
to put it out there. I have recently noticed a few requests every day on my
webserver for robots.txt. After getting that file (which doesn't even
That's an f 2105, about 14 stops larger then f16. 14 stops is 16384
times exposure. If you needed 1 second at f 16 you would need to expose
for about 4.5 hours at f 2105. Hope you have a good tripod for that tube.
But if he's using 400 ASA film, that's only 40 sec as the BDE exposure,
I used a graphing calculator.
John
What do you call this sort of shareware and how would you find it on the
internet?
That was my experience, no logo on the final print.
When replying to such a long long thread, please delete the 3262354
irrelevant messages, yahoo sigs, and the tags that the list puts from your
post. Just leave the one that you are specifically replying to. I have
scrolled through many of the
The inside edges of the tube have to be very polished. I have had many a
tube that have felt smooth, but have scratched my film. The best way to get
around it is to keep sanding the edges with finer and finer sand paper, and
finally finish it off with steel wool. You could also try puttin your
Wow! thanks for the compliment Guillermo. Sarah, if you want a description
of how I made it, see http://www.enteric.org/810/index.html
Because it's a pinhole camera, and focus is not an issue, you can always use
felt or weather stripping where the film holder sits to seal out any light.
-
I believe richard already said that he was referring to the area of the
exposed image, because it is the only part that exhausts developer. The
original question related to how much developer would be used in the
development process. Yes. there may be 47880mm^2 of surface area (actually
less,
You can always convert it to a .pdf file using a program called Pstill. Get
it at
http://download.cnet.com/downloads/0-10074-100-1628951.html?tag=st.dl.10001-
103-1.lst-7-4.1628951
If the url is broken, COPY AND PASTE IT TOGETHER! Rob - you might want
to put up the .pdf version.
John
I
I use LC-1 and ortho film too. Its very good. However it is slow. An
ASA of 1. I've used a
12 X 18 camera. It ended up having an f stop in the range 0f 300. This
translates to an
exposure of an hour on a bright sunny day for one picture.
How does that work? For a sunny day exposure with
Just thought of something else... a 3 long threaded plastic pipe nipple would
work also. You can get caps that screw onto the end, and you would have a
choice of diameters to choose from.
John
- Original Message -
From: kathryn VAUGHAN
To: pinhole-discussion@p at ???
You can make one out of two 35mm canisters. Cut the bottom out of one of them
(A dremel tool works really well), and shove it into the top of another with a
bit of glue. The circumfrence of the inside would be about 9cm, so it won't be
totally wrap around, but it will give you some room to
I know the thread on developing sheet film is a little old, but I just
thought I would throw this in.
As I mentioned before, tubes are my preferred way of developing, but they
are limited to as many tubes as you can juggle at a time. I just made a new
system, by gluing nine tubes together. I
I strongly recommend tubes. Very cheap to make, don't have to be used in
complete darkness, and pretty much impossible to scratch the film (which can
be a problem with trays). See http://people.smu.edu/rmonagha/brontube.html
for how to make a light trap for them. If you don't want to go through
Although it is a positive film, wouldn't that mean it is designed to be used
with a reversal process? If you developed it in a regular film or paper
developer, you would get a negative.
John
- Original Message -
From: Murray mur...@uptowngallery.org
To: pinhole-discussion@p at
Light traps are pretty easy to make. I used these instructions to make
light traps for my developing tubes for 4x5 sheet film. I only used two
pieces of rubber (instead of the three in the instructions), and have not
had a problem with light leaking.
http://people.smu.edu/rmonagha/brontube.html
There is a virus in steve foot's message with the subject Re: Re:
[pinhole-discussion] 8x10 Macro Pinhole
While looking for info on the San Francisco camera obscura (which I will be
visiting in january), I came across this page.
http://www.cs-photo.com/CO/CO.html Thought it may be of interest to the
list.
John
There is no rule of thumb, just plain physics of light.
This case is in no way different than if you were using a glass lens.
I guess you could say the rule of thumb is to add 2 stops every time you
double the focal lenngth.
You can think of it this way... If you have a 50mm lens at f/16,
I don't remember guillermo explaining it, so here's my shot at it.
Every time the bellows extension is doubled, you have to increase exposure
by 2 stops. If you extend the bellows by a factor of 1.414 (the square
root of 2), you must double the exposure.
so... sqr(2)^x = extension factor. x
I work in a drug store, and although we don't stock it, the pharmacist can
special order just about anything for you. He regularly orders stuff like
halfprin, denatured alcohol, etc for customers. I imagine camphorated oil
wouldn't be a problem, if it used to be a regular pharmacy item.
John
Somebody posted this url to the list a while ago. She said it was done with
a canon D30 and a body cap. http://www.meggould.net/. Or more specifically
http://www.meggould.net/pages/pin1.html
John
- Original Message -
From: Guy Glorieux guy.glori...@sympatico.ca
To: pinhole-discussion@p
I had one of those (lomo from freestyle) in my backpack for a while... and
the lens somehow unscrewed itself from the shutter! I guess there was a set
screw to keep it from unscrewing, but somehow it did. If you want to take
the lens off without having to mess with the rest of the camera, you
So, the ratio between the diameters of consecutive stops is the square
root
of two. Because in the F/stop formula, the diameter of the opening is in
the denominator, the actual f number increases by a factor of two, as the
diameter decreases by a factor of two.
oops. factor of the square
Wow, that is an interesting film. The 1000x enlargement was quite
impressive. You can see the hands on the watch of a lady sitting far away,
on top of a building!.
John
- Original Message -
From: Jean Daubas j.dau...@free.fr
To: pinhole-discussion@p at ???
Sent: Saturday, October
That it is... I want to do closeups with a short sharpness area .
So you want a small depth of field? You're out of luck with pinhole.
Everything will be equally sharp... or unsharp.
A 116 spool is not the same size as a 120 spool. Here is a size comparison
Length of the spool:
116 - 2.856 - 72.5mm
120 - 2.580 - 65.5mm
Width of the part where the film is wound
116 - 2.814 - 71.4mm
120 - 2.5 - 65.3mm
Diameter of the end of the spool
116 - 1.25 - 31.7mm
120 - .95 - 21.4mm
Could you check that url? I get a dns error, and would really like to see
the book.
One of the best references is James Reilly's book The Albumen Salted
Paper Book. This is out of print. Fortunately it has recently been put
online at http://albumen.stanford.edu/library/monographs/reilly/
I am building a wooden camera that will take 4x5 film backs. I was
planning
on just loading the film backs with 4x5 pieces of RC paper. If I were to
load it with 4x5 sheets of FILM instead, what can I do with the film
negative once I've exposed and developed it? Can I still only contact
Also, I've long wondered why no one makes zone plates
by etching and staining glass. Every zone plate I've
seen has dirty, scratched, cloudy clear zones because
it's been made on film base. Wouldn't glass be better?
Could probably be done using photoetching. Maybe too
complicated, probably
Plastic tubes filled with some kind of chemical. There is a smaller glass
tube inside the plastic tube filled with another chemical. When you flex
the plastic tube, and break the glass one, the two chemicals react and put
out light. You can get them in various colors, red, orange, green, blue
Good suggestions, I'm sure most people feel the same way. The html point
has been brought up many many times, but few people ever seem to change it.
(Almost) lastly, so my message has some pinhole-related content, I am
reading pinhole theory and looking at different camera results in
And a coat of metal primer after sanding and before the black paint wouldn't
hurt either. It is made to stick well to metal, and other paints stick to
it.
John
- Original Message -
From: G.Penate pen...@home.com
To: pinhole-discussion@p at ???
Sent: Wednesday, June 27, 2001 9:35 AM
Wow, I really like the last one on the page, with her dress flowing in the
wind. Which pintoid was that with?
I played around with altoid boxes a while ago with paper negatives. The
wide angle is fun. I had trouble figuring out how to keep them still. I
usually ended up holding them hard
I got all of them on list 3
John
- Original Message -
From: Jeremy Siemens jaramec...@yahoo.com
To: pinhole-discussion@p at ???
Sent: Friday, June 22, 2001 3:47 PM
Subject: [pinhole-discussion] Remember that pinhole swap...
Just wondering... what is the average return rate for
a
than 100. You really can't get much of an equation from three
points.
Hope this helps,
John Yeo
- Forwarded message --
From: Ballard Borich ballardbor...@juno.com
To: pinhole-discussion@p at ???
Date: Thu, 21 Jun 2001 10:28:53 -0400
Subject: Re: [pinhole-discussion
You wouldn't need more bellows extension, as a pinhole does not need to be
focused like a lens. 300mm is a standard focal length, not wide angle nor
telephoto. You could figure out how large the image would be on the film by
using simmilar triangles. I believe the optimal pinhole for a 12 focal
This makes perfect sense in my head, but it may not make sense written out.
I used this method when i was first starting out with paper negatives and
cardboard box cameras. It really helped to have a photo teacher who gave me
a really good understanding of f/ stops.
I would do a series of tests
Most modern graphing calculators can find curves of best fit. I have a
TI-83, and would be happy to provide more details on how to do it, or punch
in the numbers if you don't have access to one.
John
- Original Message -
From: Jeff Dilcher r...@hiddenworld.net
To: pinhole-discussion@p at
I've only used it once... to take the stem off a flower against a back
blackground. I started by mixing solution A and B together (according to
the instructions) and couldn't get it to do anything at all. I asked on
usenet, and Richard Knoppow advised to just use solution A alone, then soak
the
Hi Gregg,
I like the new format much better. Is it possible to view the filename as
well as the image, or have the uploader enter some text about the image?
Before, people would name the images with their name, but now you can't see
the name and don't know who made it.
John
- Original
Hi Joe,
Welcome to the list. Great website. I'm curious about your panoramic
camera. Does it make only one rotation, or multiple rotations? From the
description, it sounds like it makes multiple revolutions. What is the focal
length? That's neat you drive it with photovoltaic cells. I wonder
Could you explain it to us? Is it just really wide angle, or does he/she
somehow manage to get the fisheye distortion?
John
I have a friend who is a professional advertising photographer who has a
pinhole camera that is like a fisheye lens.
I'm (re)taking basic photo in high school because of a schedule conflict...
I would say that the majority of the people in the class are just there
because it's an easy class to get out of. 10 min into the period, most of
the class is out taking pictures. I don't really mind because it leaves
To get the actual number (not a decimal), divide the focal length by the
pinhole diameter. As for exposure, my method is to meter the scene at say f/16
and use equivilant exposure to determine the exposure for the pinhole. Double
the time for each stop. Say it's a sunny day with 100asa film,
I though this was the guy who told us about his holga he stretched using the
book binding material... i think he promised to post pictures, and these are
them.
John
- Original Message -
From: Guy Glorieux
To: pinhole-discussion@p at ???
Sent: Tuesday, March 13, 2001
It says extreme depth of field... and I would think that f/256 with a 2
focal length would be pretty extreme depth of field. I remember seeing this
camera once before... maybe somebody posted it to the list? I'm curious if
anybody has one. It seems like a lot of money for something that can be
Chris,
Micrometers measure to 1/10,000 of an inch... I think I've seen them at
true-value hardware for around $30. They're probably poor quality though.
I have a set of dial calipers that measure to 1/1000 of an inch that I got
at the swap meet for $12. I've never had to measure pinhole needles
You might want to check out
http://www.bostick-sullivan.com/Technical_papers/paperneg.htm. It has some
more info on the topic.
John
- Original Message -
From: Jerry and Katherine Green-Ellison peace...@etex.net
To: pinhole-discussion@p at ???
Sent: Saturday, January 20, 2001 8:53
ID BE NICE IF YOU CAN BLOW UP (8x10 perhaps) ONE OF THE FRAMES, SCAN IT
AND
LET US SEE WHAT IT LOOKS LIKE, I'D CERTAINLY BE INTERESTED.
Here, I enlarged it to 8x10. http://holgamods.blinkk.net/images/limo.jpg
This one was shot 'lomo style' from the waist as I was walking by the bank.
This limo
will overtake the circle of
confusion. Diffraction will add to sun flare. The lines in the frames
seem to extend to the border. Has the film gone through an Xray scanner?
I should have recognized my own town on the pictures but had to look
twice.
Richard Heather
john yeo wrote:
A few days ago I made
That's what I thought at first, but it has never appeared in any of my lens
photos with that camera. I just had the bearings on the shutter lubricated
about 2 months ago. I guess that doesn't rule it out though... mabye the
repair screwed up. I'll see if it appears in the future with that
, SO I AM
WRITTING IN UPPERCASE TO DIFFERENTIATE THE ANSWER FROM YOUR POSTING.
- Original Message -
From: john yeo
A few days ago I made a pinhole body cap for my canon AE-1. I made the
pinhole as small as I could, it ended up .0065 +/- .0005 f/270. Would
using one of the formulas
code to see how you did it. I'm
also curious what format you generated. My web host only allows Perl, so I'd
have to translate it.
Larry
-Original Message-
From: John Yeo jonn...@thegrid.net
To: pinhole-discussion@p at ??? pinhole-discussion@p at ???
Date
really have to look for the zone plate in the middle
of the image.
Larry
-Original Message-
From: John Yeo jonn...@thegrid.net
To: pinhole-discussion@p at ??? pinhole-discussion@p at ???
Date: Wednesday, December 27, 2000 4:48 PM
Subject: Re: [pinhole
Larry, Thanks for making this. I'm sure you have already put a lot of work
into it... but i get nothing but a blank bitmap. No rings at all.
John
- Original Message -
From: Larry Fratkin
To: pinhole list
Sent: Wednesday, December 27, 2006 3:52 PM
Subject:
I tried developing a print in coffee once. It didn't work at all. I mixed
up instant coffee at twice the reccomended dilution, printed a picture and
put it in. I didnt' use baking soda, I just assumed it was used to make the
soup less acidic. I didn't monitor the pH because it said the best pH
http://www.p at ???/discussion/upload/images/divided.jpg
- Original Message -
From: Tom Lindsay tlind...@erols.com
To: pinhole-discussion@p at ???
Sent: Thursday, November 30, 2000 5:48 PM
Subject: [pinhole-discussion] What to do? What to do?
Hello All,
I just uploaded a
I know we've already beat this subject to death, but I found a new tape at
the hardware store today. It's called friction tape, and is used among
other things, to wrap hockey sticks. It's very sticky, and very flat black.
I held it to a flashlight and stretched it, but no light came through. To
Why would reciprocity failure even be a problem? It occurs when there are
very long exposure times. I beleive even the slowest flashes on the market
are much faster than 1/1000 of a sec, so even if you flashed 100 times, it
would still be less than 1/10 of a sec, which is in the reciprocity
Maybe use a copy stand and a digital camera, if you have access to one.
John
- Original Message -
From: Chuck Flagg cfl...@ispchannel.com
To: pinhole-discussion@p at ???
Sent: Monday, November 06, 2000 11:01 PM
Subject: [pinhole-discussion] Scanning Question
I have changed ISP's
Yes, It is very possible. Guillermo Penate has some info about it on his
website, http://members.home.net/penate/double.html.
John
-Original Message-
From: pinhole-discussion-admin@p at ???
[mailto:pinhole-discussion-admin@p at ???]On Behalf Of Rob Dillard
Sent: Sunday, October
Was it http://www.casema.net/~bkarhof/
John
-Original Message-
From: pinhole-discussion-admin@p at ???
[mailto:pinhole-discussion-admin@p at ???]On Behalf Of Philip Corlis
Sent: Thursday, October 19, 2000 9:42 PM
To: pinhole-discussion@p at ???
Subject: [pinhole-discussion]
SFW film has worked fine for me developed in C41.
John
- Original Message -
From: Richard Heather rheat...@slonet.org
To: pinhole-discussion@p at ???
Sent: Wednesday, October 11, 2000 4:38 PM
Subject: Re: [pinhole-discussion] New Pages
Seattle Film Works film ASA 200
Now:
I think you're confusing it with the pinhole turret for zone VI cameras,
sold by calumet for $450.
John
- Original Message -
From: George L Smyth glsm...@yahoo.com
To: pinhole-discussion@p at ???
Sent: Monday, October 09, 2000 5:14 PM
Subject: Re: [pinhole-discussion] Fwd: Body
I've had the holga lens produce flare simmilar to that of a pinhole, but
it's in more of a circular pattern. Maybe it has to do with the fact that
there's only one element in both.
John
- Original Message -
From: Jeff Spirer j...@spirer.com
To: pinhole-discussion@p at ???
Sent:
Wow, those are really sharp. I like the one of you standing there... kinda
like a ghost.
John
- Original Message -
From: Erich C. Decker fot...@rz-online.de
To: pinhole-discussion@p at ???
Sent: Tuesday, August 22, 2000 12:05 PM
Subject: [pinhole-discussion] Pinhole Gallery
Hi,
72 matches
Mail list logo
