anamorphic images with the Pinholekamera I
perspective extreme!
view from the skylight. Through a pinhole in the lid of a tea box recorded Photo.
S chon from 16 Century painters dealt with this kind of perspective. The image / drawing showed only makes sense if you have a cylindrical mirror in the middle and put in this then the subject considered.
applications
An anamorphic lens is a lens, the anamorphic images produced: it is used as the "film" is a broad picture on a narrow format to compress, and then again in the projection on " be widescreen equalized "to.
pinhole means for Pinholefotografie this mean that the hole is placed in the lid of a cylinder. The light then falls on the inner surface of the cylinder shell and leads to extreme distortion of the subject.
exposure, processing
is not quite so easy to find the correct exposure. While at the top of the film / Photo paper, the distance is relatively small and requires only a short exposure time, one would need at the bottom of a multiple of this time for a proper exposure. If adopted seven ASA for the photographic paper resulting in sunshine an exposure difference of about 20 seconds to 10 minutes. So it is important to find a compromise and in the darkroom or the image processing on the computer hard nachzuhelfen to achieve a reasonably usable result.
can be helpful in this process, or technology, under the name DRI (Dynamic Range Increase), or operate HDR (High Dynamic Range). For the above photo I took while scanning once "exposed" to the depths and once on the lights and then with the software Photomatix Basic (available in this limited freeware version) and copied it. can also be similar with Photoshop Results.
Unfortunately, it is with my camera dose not possible to produce different exposures on film and then to work with the already mentioned methods.
paper size 13 x 18 cm
clearance hole / Photo paper about 35 mm - 120 mm
hole diameter 0.3 mm
cover approximately 116-400
In the tea box I have long pieces of cardboard glued to a sheet of 13 x 18 cm photo paper exactly edge to edge fit .
Show my cameras V
format -
frame module camera in the 4 x 5 inch large format
nspiriert
I by the multi-format camera by Zero Image, I have my own little by little "system camera" was developed and constructed with an open end. The principle is simple: because you do not focus a pinhole camera by means of a bellows must be extended to extract reciprocally uses pluggable framework, which are held together with rubber bands. On the first frame at the bottom of an aluminum flash bracket is attached with a tripod thread. The "lens board" is 3 mm thick made of black polyester. Then I placed the worn centered round an enlarger board with 42 mm thread, it can take either the lens Obscura-set or the T2-adapter. The two aluminum rails for fixing the plastic plate from the wood of the frame glued 4 mm machine screws, which I had sawed off the heads kept. The rubber bands I've hung in 6 mm screws that are inserted from the inside. The mother is the head of a round Conclusion. For easy alignment, I glued up a level (spirit level) on the frame.
on the inner, black-painted frame, I have front and rear glued foam rubber strips to improve the light leakage. It would be possible as well be black felt. The dimensions of the frame are suitable for sheet film cassettes or constructs the Polaroid pack film cassette. I have taken as an inner diameter of the outer frame 170 mm x 170 mm. The "lens board" has therefore the same size, everything else follows from the use of wood. A module is 30 mm deep, thus resulting "focal length" of 60 -, 90 - and 120 mm. These range from completely normally. The more context, more unstable and heavy and therefore difficult to handle the construction.
replaced with 2 frame is a wide-angle camera with an angle of about 108 degrees relative to the 4 x 5 inch film format.
is properly stable, this design by using aluminum L-profiles, which are fixed with machine thread screws. Here is the version with 3 frame (90 mm) and Copalverschluß zone plate combination. To compensate for the larger clearance hole / film, caused by the closure, I have the "lens board" built back inside.
A 70 mm deep extension is used for inserts. In the above example is one half of (Papp) cylinder in a sheet of 13 x 18 cm photo paper or film fits. So it is practically the "doses camera" inside my "system"
Slitcam I
"sharp things" - slit camera A variant of Pinhole and Zone plate, the slit camera. In the T2-adapter I mount instead of the zone plate, the halves of a razor blade in 0.3 mm Distance. - If the slot is as long as the film format, everything is resolved in horizontal or vertical lines of color - it is clearly nothing more.
In the next example, the slot is shorter, the shadowy outline of the avenue trees looming. Would be reduced to the square, the resulting image would be similar to that of a round pinhole. In the right picture I shortened by cardboard mask to 2 mm. The result is the approximation to a receptacle with a hole.
A small gallery of images from "Slitcam" I have to flickr published.
"pinhole stitching
blend of analog and digital technology
meet here together old analog technology with modern computer technology . Sacrilege for "pinhole"? I had to try it! After initial experiments with the stitching digital camera I was doing a SW-roll film in the just newly arisen and "pinholisierte" Holga . with tripod and ball head, I then made my shots, each by 30 degrees horizontally turned further. After developing and scanning the big moment. The individual images were loaded into the demo version of " Panorama Factory " - the result is amazingly perfect at the first automatic pass. The software (An older version is available as freeware as here) is probably good for beginners. The last picture I have drawn out the Lochset something by mistake, hence its light ...
8 individual recordings via software "stitched together" (stitching)
Zone Plate
Blur
on a piece of film
The "PinholeDesigner" goes I think the easiest way. Man wearing a the necessary parameters and can can be created by the program a PDF. Printed on good paper and photographed the print on Lithfilm at right angles, (the scale can be under the tab "Magnification" calculate distance camera - expression) developed and completed, the zone plate. When KB-I think this movie has only the Kodak Technical Pan. If Repro is a device for magnifying device, and "slash film is also a possibility.
The Pinhole Designer David Balihar a freeware program for Windows computers, which can calculate almost everything around pinhole and zone plate photography.
I went a third way. Since I did not know the Pinhole Designer, I have a template that I had found on the Internet, in the graphics program increased traced and a service bureau, which produces films for offset printing, where my free hand file for the exposure.
And who wants to save all the drudgery, can such a "zone plate" buy now, too.
Zone Plate and closure
The "zone plate" with their increasingly narrow translucent circles around the actual hole around is "brighter" than the pinhole. The exposure times are more in tenths of a second range. It is therefore advisable to work with closure. Suitable for this miniature cameras just fine. But of course, medium format cameras that can be attached instead of the appearance a "zone plate". In large format it is somewhat difficult, because here a separate closure required.
My cameras IV - FED 5 as a zone plate camera
FED 5 -
miniature camera from Kiev with Leica thread - my Zone Plate "camera.
No direct Leica clone, this fully mechanical Ukrainian, but the design just a little reminiscent of the legendary role model. In the 39 mm Leica thread "I screw an adapter ring 39 - 42 mm. These then comes the T2 adapter (right) receiving my zone plate, a piece Lithfilm with transparent hole and always close becoming also the transparent circles around it. In order to fix the "zone plate" I use a screw ring 42 -39 mm. Finally, I turn another 20 mm, an intermediate ring 39 mm thread diameter, which serves as a sun visor. Between this ring I can use directly on the case as an extract extension.
course, also fits the lens Obscura-set with 42 mm adapter ring into the camera body. The advantage of this search model is that "everything" in a compact form it has. It has a built-in selenium light meter that does not even need batteries, a tripod socket, self-timer, cable release connection and a mechanically running cloth shutter from 1 to 1 / 500 sec and B.
film formats - 24 x 36 mm film
distance hole / film - 38 mm
angle - 59 degrees
hole diameter - 0.275 mm (Zone Plate)
panel - 52 (Zone Plate)
bases
exposure time - the formula
By the time you get some experience to approach the correct exposure time. But here again the spirits of divorce. Experienced hole camera photographers work with the feeling of not having the computer say some. The others prefer to rely on measured values and formulas.
The mathematical formula for calculating the exposure time is:
image distance divided by aperture diameter = light intensity.
on our example image distance (focal length) divided by 100 mm aperture diameter 0.3 mm is 333.33. must obtain in order for the pinhole camera from the exposure level to expand the scale of the exposure meter. There are also some templates, such as the slide rule by Dr.-Ing. A. Irmer as PDF file (see photo)
A measured exposure time of 1 / 30 sec. at f/22 in Aperture is 362 (the next value of f 333) 8 seconds. The wars, however, unfortunately not. Now comes to the Schwarzschild effect. For exposure times from 1 second, namely films behave differently than in "fast" times. One must allow for an extension factor that differs from manufacturer to manufacturer. In Ilford it is in our example, the factor 2 (8 sec). Our exposure time would thus be equivalent to 16 seconds. Fortunately, negative films are quite tolerant. But it's no good, reproducible results must be tested, or you have a very good "gut feeling"
The exposure helpers from the Web
There are some sites with small Java programs that help the exposure time calculation, and there are freeware programs you can download and install. The program is certainly the most versatile PinholeDesigner David Balihar.
the Pinhole Designer some popular films with previously unrecognized Schwarzschild correction are preset. The resulting times can secure a table.
is also very well done program by Michael Ratzkowsky "pinhole camera" . Also here you can print lists, taking account of the Schwarzschild effect common film marks are given.
For Mac OS X there is a pinhole calculator. PinholeCalc is a little freeware program that enables the to calculate all the important functions of pinhole photography, though not as extensive as the PinholeDesigner for Windows
My cameras III - Agfa Clack
Agfa Clack -
6 x 9 in "crocodile" look
There are hobbyists remove, or mechanic who make it to this camera, the optics and to modify the cap so that it is pinholetauglich, even with cable release connection. My first attempt at the "Clack" has not worked out so well adapted. I decided therefore to radical cure and have removed the entire lens mount. Instead I have adapted a 3 mm black plastic plate to the housing and they stuck a 42 mm thread adapters. In this adapter now fits the lens Obscura-Set . Also, a tripod mount is standard. The viewfinder helps to approach special scenes of the subject. More for the Sunday walk is the convenient carrying loop on the right.
film format - 6 x 9 cm Roll Film
clearance hole / film - 73 mm
angle - 73 degrees (slightly wide)
hole diameter - 0.3 mm
panel - 243
My Cameras II - "Pin-Holga"
"PinHolga"
of the cult-plastic clippers for Super Pinhole
It they are already finished to buy, but here is my version of this pepped Plastikcam, with the Zörk Lens Obscura set from the Bavarian camera accessories forge. use
To my lens Obscura-set of, I have the look, including closing completely removed. Even the cable to the flash shoe, I had "defused." Now fits (thick 2 mm) with a foam rubber strips glued, the adapter ring of the pinhole sets out okay in the case. Estonians, however, I had to when when you see that I had with the lens cap on exposure, the set always pull out something, which led to light. Namely exposed by removing and re-attaching the Lens Cap. Then I cut out the original objective with the coping saw, (the Holgafans forgive me, it is not broken and immersed in another place again, I promise!) The lens mount with its plastic screw my construction is now rock solid. It also serves as a sun visor. To screw on filter, I have even an adapter ring 52 - 55 mm with 2-component adhesive mounted. This also triggered cover of lenses with 55 mm thread. The lens can Obscura set out to take you now like a lens. I have also donated the Holga or a tripod thread. Any "leak" in the housing must of course be eliminated (cellular rubber, adhesive tape, black), unless you use this factory as a deliberate lack of stylistic devices, as some are doing this Holga photographers.
film format - 6 x 6 cm Roll Film
hole spacing / film - 46 mm
angle - 89 degrees (wide angle)
hole diameter - 0.3 mm aperture
- 153
pinhole photos with this camera, I have here and here published.
cameras I - Agfa Synchro Box
Agfa Synchro Box -
A camera classic with format receives a new task.
It has a tripod socket and a cable release connection with the closure can be locked for long exposures. The surveillance-seekers one for high and one for landscape, one can determine the picture in as. With a small slide, it is even a yellow filter for better contrast in B & W film show. On the back of the camera we find the usual window for the image number.
order from this "metal box" to make a pinhole camera is not much to do: actually I have only the lens (or better the lens) from the inner part and replaced with a 0.3 mm hole. It may be necessary to cover even the camera light is sealed inside a bit, as was the case with this box ...
film format - 6 x 9 cm Roll Film
distance hole - film 100 mm
angle - 56 degrees
hole diameter - 0.3 mm
panel - 333
pinhole photos with this camera I published here.
Pinhole Photography -
The other point of view
What is the attraction of this unusual, old-fashioned kind of photography? Is it a kind of counter-movement to the digital camera boom? Slow Food for photographers? The Überrraschungseffekt, What ultimately comes out of it? The surprise about what you can image with a simple hole? To make the kind of contemplative images that has so nothing to do with stress and quick fixes?
A question of size
(K) is a matter of faith? Small picture, roll film, sheet film? 20 x 30 cm, it is just beginning to get interesting? Best in the truck or trailer exposed on the meter? This sounds like the debate between analog or digital photograph. My opinion: it does not matter. I've seen a lot of convincing pinhole images of the small film and I'm just fascinated by large formats. Sharpness fanatics get their money anyway, not with this technique. Oddly, or not, I have hardly seen images that have been made with "perforated" digital cameras.
camera design, exposure, development
N oh the first successful experiments with the pinhole photograph of the creative image of fun really starts in earnest. You can plan for its cameras image ideas and run as horizontal formats for panoramas or multi-hole-pictures, may plan, rectangular or cylindrical film holder design, anything as a "camera" for any purpose for which you somehow opaque record and gets the film or photo paper can, the possibilities are almost limitless.
M it the choice of material to be exposed - film or photo paper, deciding on the length of exposure. In film and short focal lengths "to times are within seconds, paper probably know this hours. Thus, for the motive, of course, the light-sensitive material is crucial. Of architecture and landscape we can indeed use photo paper, but which model is sitting for several hours for a portrait.
S chwarzweiß films I develop mostly ; color material I give to the lab. But in the further processing are the ghosts. While some increase in their own darkroom to Barythpapier or copying and prepare their prints carefully by hand, I belong more to the other Group, their negatives scanned and then in the digital darkroom (Photoshop / Gimp) processes. When I need prints, I have the choice between ink printer or service exposure. The latter is usually even cheaper. It remains for me but the option of "fine print" with these pigment inks on high quality paper ... and my negative I've also, just in case ...
view from the skylight. Through a pinhole in the lid of a tea box recorded Photo. 
