Showing posts with label hand drilled pinhole. Show all posts
Showing posts with label hand drilled pinhole. Show all posts

Monday, October 22, 2018

Roadtrip: Blue hills, blue water, and black humor.

The destination for our epic roadtrip was Andy and Kristin's new home in Weymouth, Massachussets. We spent an enjoyable time just hanging out watching YouTube, getting splendidly fed by Andy, visiting a few lovely parks, and one weird museum.

Cushioning Boston's bottom on the southeast is the Blue Hills Reservation, a really big nature preserve in the middle of such a megalopolis.

We went for a walk around Houghton's Pond.

Some rocks floating in the sky.


Leaf-peeping season was just beginning but occasionally we passed an autumnal scene, enhanced in this case by overexposure.


Our guides silhouetted against the lake with the Great Blue Hill and it's historic Public Broadcasting transmission tower in the background. As any good guide should, Andy provided us with the interesting trivia that the tower's location was the source of WGBH's call letters.


On Sunday morning, we drove down to the Cape to visit the illustrator Edward Gorey's home in Yarmouth Port. I read somewhere that an apt contemporary comparison of his oeuvre was to Tim Burton. In the last room on the tour, there was a small desk with some art materials to keep children busy. Andy and Kristin were the only ones south of 60 in the place so it seemed like a safe place to set the little tripod.


When I found myself alone with everyone else two rooms away, I took the opportunity for another view from on top a stack of brochures for the charitable organizations Gorey had left his estate to. The titles to the PBS series Mystery were playing in a continuous loop which gave an appropriate sound track to my surreptitious tripod use.


I first encountered Gorey's work when I processed his compilation Amphigorey in the cataloging department at the UW-Stout Library. It was one of those books where you turn over the title page to check that the call number has been recorded correctly on the next page (go look at a library book) and end up guiltily reading the whole book to see what outrageous thing is going to come next. This tree outside the house was particularly Gorey looking.


Kristin is a major horror movie fan, and Sarah just mined Steven King's stories for one of her contributions to the Haunted Hump Day festival, so references to King's works came up a lot on this trip.  Particularly the Overlook Hotel.  Here, with random application of a shaky tripod, I turn the vaguely disturbing Edward Gorey House into a royal horror show.


We followed with lunch at Longfellow's, a charming Cape Cod pub. I felt it was necessary to have fried seafood.


We stopped on our return for views of the tidal flats of Cape Cod Bay.





Next, Pennsylvania, or not.

Sunday, September 23, 2018

Color around town.

While riding around town working in black and white with the new rising front cameras, I occasionally saw some scenes with colorful elements that seemed more appropriate in RGB so the Evil Cube went in my bag loaded with Lomo 100.

One day, Miller's Bay was full of sailboats.


There was some kind of regatta of a specific model of sailboat and they were putting them in the water as fast as they could from the three launch ramps on Miller's Bay. Later on, I counted 39 of them out on the lake. It was a bit chaotic and two nearly collided right in front of me. The action was too fast for pinhole. As I walked off the pier, this backlit boat on a dock nearby was paused to adjust something.  After it sailed away, the man standing in profile asked if the pictures would be posted somewhere. I showed him my pinhole camera and cautioned about the uncertainty of analog pinhole and the time it might take before the film was processed. He found Pinholica on his phone and bookmarked it. Hi!


On my normal route downtown, it's hard to miss these bright red bollards protecting the door in the entirely black back of The Dollar Store.


I usually don't indulge in this sort of thing, but sometimes the randomness and simulation of the passage of time get to you. When setting up the above picture, after measuring the exposure close to the wall, I went back to the camera and found the shutter was open. It must have gotten pulled when it came out of the bag, stayed open and recorded four distinct steps before the shutter was closed.


Behind the Romanesque chapel in Riverside Cemetery, I noticed this red door in the dappled light.  As I measured the exposure a fellow came around the building and remarked about my use of a light meter. He was surprised to learn it was an app on my phone.  He told me he was tending his ancestors' graves from the 1800's. I told him I was photographing the red door. He said he didn't think it was open. I thought "But it's still red."


On what used to be busy Highway 110 but now is sleepy County S, there is a discount construction materials store. Displayed by the road are many giant sculptures of animals and other characters they also sell. It was once featured in Zippy the Pinhead. It's a weird sight but a little creepy and oddly not very interesting to photograph.


I was listening to the Lensless Podcast the other day and Justin Quinnell, my Pinhole Day colleague and owner of the vintage web site pinholephotography.org, waxed on about how more interesting pinhole photos were from cameras placed right on the ground and not the ubiquitous viewpoint five feet up. I can do that.


All with the Evil Cube.  .3mm pinhole 6cm from 6x6cm frame on Lomography 100.



Friday, September 14, 2018

The Variable Cuboid Pinhole Camera System


Evil Cube film path
My favorite camera recently has been the new Evil Cube, and the original Evil Cube before that, admittedly for the silly reason that I like the cuboid shape over the more rectangular aspect of my other cameras. I set out to make a camera that's similar in shape, but more wide angle, 45mm. The problem is that if you divide up a shorter box into a triangular image chamber, there's not enough room left for your 24mm film reels.  You'd have to make the box a little wider, and pretty soon, you might as well just have the original Populist scheme with the film beside a rectangular image chamber.

However if you could put the film plane in front of the reels, you could make the camera as short as you want.

So in order to figure out how to do this, the obvious thing was to check out how it's done in a medium format SLR, my youthful envy of which is driving this whole thing.

In most film cameras you've ever seen with the film plane in the back of the camera, the film path is pretty straight from one reel to the other, although as above, it might have to make two turns.

Medium format SLR film path
In an interchangeable back medium format SLR, the film leaves the right reel clockwise at the top going toward the right, makes about a 140° turn over a roller riding against the backing paper, crosses the image plane with the film facing out and turns around again, to be taken up by the left reel – a little more tortuous path.

Hasselblads have exquisitely integrated, precisely engineered mechanisms made from the best material to make the film move through the camera smoothly. I have a slightly more limited repertoire.

Experience has taught me that the 90° turn the film has to take in the Evil Cube required a little more engineering than the straight path of a Populist, so this meandering path was going to be another step up. That usually means more layers of cardboard.

Another revelation was that once the film was behind the film plane, the camera could be any length you wanted, shorter or longer. If it included a Pinhole Lab Camera style light trap, you could make interchangeable fronts with a variety of distances from pinhole to film. Don't even think about calling them lenses.

Suddenly I have a Variable Cuboid Pinhole Camera System.  Take that, youthful envy!

The back is designed sort of like the Evil Cube Template: a film carrier assembly, inserted into a back-of-the-camera box, with the front box overlapping the back.

The first attempt just used cardboard for the edge that the film rides over. I'm always impressed by how rugged film is being dragged across my cardboard dividers, but this was too much. I could barely nudge it a few millimeters at a time and I was sure there would be marks on the negatives from the compression.

Since 3/8 inch dowels are already part of my pinhole pantry, they might provide a more gentle curve for the film to follow.  I thought about placing plastic drinking straws around them, but they're narrower and I didn't want to reduce the radius of that curve. I did sand the dowel as smooth as I could and gave it a good coat of pencil graphite to make it as slippery as possible.

These are held in place by layers of foamcore above and below the film holder.

The film reels have to be kept parallel, and even with the lubricated dowels, the forces on the take-up reel to twist out of line are considerable. To keep the bottom of the reels in place, I whittled a shorter version of the winders and held them in a double layer of foamcore, and applied more graphite since it has to rotate with the film.  This violates my dislike for small pieces that can get misplaced, but I'll just have to be careful when loading.

One issue with having the film on the image plane in front of the box is that the back of the film with the numbers on it is now an inch and half inside the box with the film reels. I made light proof dividers for the film chambers with as wide a middle bay as possible and used a double-wide shutter to let more light in to see the numbers. In the first prototype, out on a sunny day, it was hard to see them when winding so I glued white paper to the sides to reflect more light.


This part also provides a little structure which helps keep the reels from wandering while you're loading the camera. A t-nut tripod mount is installed in the foamcore layers at the bottom.

The film holder goes into a frame which has a film gate in front of the film to keep it from spooling out into the front of the camera. It also provides an exactly 6x6cm opening so images don't overlap.



The winders are inserted and the frame is placed into the camera back which overlaps the winder collars.




The internal frame extends 10mm out from the back.

The fronts are made to the length you want optically, which slides over the frame and right up against the back.  There's a layer of foamcore (or a couple layers of corrugated cardboard) in the front, 10 mm shorter than the outside, which stops the two parts from sliding any further together.  The entire joint is covered by a light trap which extends over the back all the way to the winders to make it that much more difficult for the sun to sneak through to make mischief.


The camera fronts need to each have a shutter, but Hasselblad does it that way as well. They can, of course, have pinholes sized appropriately for the distance to the film. The viewfinders have to go on the front as well.

The film moves easily enough. It requires a loosen-first-then-wind technique and I've found that it tends to jam up if you tighten the take-up too much so it tries to pull film off the supply.  Better to let it stay loose until you get to the number, and then retighten the supply to flatten the film against the image plane.

When the camera is loaded with film, the fronts have to be changed in the darkroom or a changing bag. I didn't have any trouble doing it in the dark. I get a little dizzy thinking about trying to make a removable dark slide that would allow the front to be changed in the daylight.

I made three fronts.

A 45mm, which started the whole thing, has one of my double shutters and two .29mm pinholes, one on-axis and the other rising 10mm. There is a cardboard triangle on the top for viewfinding.  On the sides the axial and rising pinholes are marked with beaded pins and the image plane with cardboard lines.


Here's the back of The Ruby Owl Tap Room and an acupucturist/holistic health store, with nicely parallel verticals.


The loading bays of the new addition to the Oshkosh Public Library. The film gate is something I have to work on because it obviously didn't prevent the film from bowing out.  The rising front isn't really worth it, to keep your verticals parallel, if the horizontals are wonky.


Another neoclassical building in Oshkosh with a modern addition is the Wisconsin National Life Building, now housing more of the Winnebago Dept. of Human Services. More pinhole fun with the curvy film. A guy came out of the building and we spoke about the contrast between the two structures, but he never mentioned I had a cardboard box on the tripod.


I made a 20mm front as an extreme example, although you could go as short as a 10mm. At this short a distance, in a regular camera with a 24mm film reel limiting the depth of the camera, you'd have to inset your pinhole into the camera body. I have seen this done. While trying to make the matched pair of pinholes for the 45, I made a .23mm, so I just used it for this one despite it being a hair big for this distance. At a 117° angle of view, it didn't seem worth it to put a rising pinhole on it. I reused the original shutter of Long John Pinhole and was surprised to find the edges of the shutter appeared in the images.


Here's my standard test shot of the entire north wall of the living room. Exposure was apparently five minutes from a quarter before until ten to nine. I could touch the mantle from where the camera was. I have long arms, but still... 


It's always fun to see how close you can get. This is about two and a quarter inches from Minnie's Nose.


The camera is just over my head with the tripod strapped to the shelf of the baker's rack with a bungee cord. This was adjusted for overall brightness and contrast, but otherwise left alone so it's a fair representation of the the degree of vignetting. I was expecting a circle with totally black edges.


As high as the tripod would go looking up under the arbor covered with morning glory vines. Surprisingly it was close enough to not have the rest of the yard visible.


On the extreme other end, I made a 200mm.  In the Some Assembly Required column on the Boston based Don't Take Pictures website, I saw a 600mm long 6x7cm format pinhole camera with a Pro back and an old box camera front. The camera maker, Jeff McConnell, had a really big pinhole on it because he wanted it fast enough to hand hold for street photography. That's the only other pinhole camera I've seen with a length to film format ratio this extreme. I just used a trusty #10 needle-diameter .5mm pinhole, which really isn't that small for this long a camera.


A long camera let's you close in to relatively distant compositions. The camera is tilted up a bit but the slightly converging verticals aren't the first thing you notice. I didn't think it worth it to put a rising front on this long a camera either.


Don't Take Pictures did a post on Long John Pinhole. She used a photo I took of a water feature in the Paine Garden and quipped that the long camera allowed me to get the shot without getting into the pool. Well, I had one leg of the tripod in the water for this one. The thing that caught my eye were the reflections of the vines in the water, and with a shorter camera, I would have had to have suspended the camera on a boom to get it to the right spot. This is at f400 with Arista.edu 100 so this was about an hour exposure. I made lunch.


Long cameras also make getting closer easier without getting the camera in your light (although I didn't have any trouble with Minnie and Mickey).  Not really a problem with this backlit dahlia in any case. The flower is about 120mm across so this is a 2:1 macro shot. This is probably heresy but I'd like it to be a little crisper. I think I'm going to change to a .4mm pinhole and see what develops.


I found several dumb errors in the template which I have to fix, and then the ultimate test will be to see if I can build a new back that fits into the fronts I already made and new fronts fitting into this back as well.

I'll probably do a "building-of" post when I make those, but it might be awhile.  This much engineering takes a lot of cardboard and we have to eat enough cereal and crackers to get the materials. (Here’s the link to that “building of” post)

Friday, September 7, 2018

Testing's just another word for playing pinhole.

I'm testing a new concept for a camera. Building and using a prototype revealed lots of little improvements and errors on the template, so I'll tell you all about it when the new revision is built and tested.

Until then, I can tell you these pictures were done with a 45mm long 6x6cm camera, with an axial pinhole and a rising front pinhole 10 mm above the film axis. Mr. Pinhole says the image diameter is 86.4mm at this distance, so with a rising front I might see some vignetting in the top corners.

I also didn't install any three-dimensional viewfinders, I just drew pencil lines.

It's really hard to tell where you're pointing when you're in the photograph, but I used a long piece of dowel to point to where the edges of the image were.  My intention was to portray my bicycle tan, but this might not be the best film to capture that.


One objective, and actually what started the whole thing, was to see how the rising front behaved with this wide an angle. Any tilt or otherwise off-kilter alignment of a wide-angle camera is always exaggerated, and it looks like the camera is tilted down ever so slighty so the verticals diverge. The art deco Winnebago County Courthouse was built in the roaring twenties. They recently put all the high tech security screening stuff in what was the back of the building facing the parking lot, so the old main entrance is preserved but isn't used much.


Another rising pinhole test, another little used entrance to the courthouse. Looks like I got the camera more level on this one.


With just the pencil lines for viewfinders, with the camera as high on the tripod as it can go, with the sun in your eyes, it's really hard to tell exactly where the edges of the frame are. Several times I made that most common error of pinhole rookies: not getting close enough with a wide angle camera. This is the side of the Public Safety Building on very busy Jackson Street.  If the camera had been in the middle of the street to get the composition as previsualized, I probably would have ended up inside.


I wonder if the Greeks had any idea how persistent the architectural styles they developed would be? This was the original entrance to City Hall, formerly Oshkosh High School, now missing the massive staircase that lead down to the street. Like the courthouse, people now go in from the parking lot on the other side. A slight tilt down again. I gotta start using that level.


The front of Camera Casino.  Kind of looks like a theatre box office, doesn't it?  It was the Bijou Theatre from 1905 to 1912.  The owner and a staff member, standing at the front counter, noticed me and waved so I went inside to advance the film in the air conditioning and show them the camera. They're both roughly the same vintage as me, and have seen just about everything photographic, but neither has ever told me they had used a pinhole camera.


Speaking of vintage, an eight minute self-portrait on my sixty-ninth birthday with a new t-shirt and headphones from Sarah and a flat pick in my hand.


.29mm pinholes, one on-axis and the other 10mm above the axis, 45mm from 6x6cm frame on Arista.edu 100 developed in Rodinal 1:50.

Saturday, August 18, 2018

Long John Pinhole

I've been carrying around the Moderately Telephoto Pinhole Camera in a Plain Brown Wrapper lately and came to think the camera wasn't completely opaque. It seemed to be fine in lower light situations around the house and on cloudy days, but out in the summer in bright light there seemed to be a few very dense, low-contrast negatives which were denser at the top and bottom of the negative than in the center as if there were photons sneaking through the back and over and under the opaque backing of the film.  If an image was done just after another so it wasn't in the bright light as long, the problem wasn't apparent. The inside of this camera was painted with black interior latex paint. It sure looks opaque, but it could pass some light in the bright sun or when the camera is out for a while even in cloudier situations.

So I put four heavy coats of black Krylon on the inside.

I recently wondered why long image forming objectives were called by the greek-derived word telephoto and short objectives were just referred to by their wide angle of view. It turns out that a telephoto lens is one with a special group of lenses that makes the overall device physically shorter than it's nominal focal length.  I can't use that term for a pinhole camera.

When painting it, I didn't mask off the outside and got quite of bit of paint spatter on it, so it's not in a Plain Brown Wrapper anymore. The punk look of the paint spatter is kind of cool.

So henceforth it shall be called Long John Pinhole!

There's a long tradition of long things being named John.  There's Long John Silver, the archetype of a pirate whom we all speak like in September. Long John Baldry was a favorite member of the British Blues movement.  The one piece union suit workers wore to deal with unheated factories and farms are Long Johns.  An elongated cuboid of fried pastry dough covered with icing is called a Long John.

So out around town in the sunlight to see how this worked out.

I've noticed the way the morning sun lit this back wall of The Light Of The World, Church Of The Living God, Pillar And Ground Of The Truth, on previous bike rides and returned several times to try to photograph it.  On separate occasions I encountered: three children playing in the front yard next door; an ugly giant SUV parked in front of it; garbage day; an occupied police car parked across the street; and the entire congregation restoring the inside. Finally, last week I got there and the light was perfect and the whole block was deserted.  With just Long John Pinhole along I needed to be out in the street a bit to get the wall parallel to the film.  I worked out the distance, leveled the camera and measured the exposure while still on the curb. After stepping out in the street and starting to adjust the camera pointing, a young women came out to let her dog pee, which appears in the lower left corner.  I explained that I was taking a photograph of the church.  She didn't reply.


While on the subject of churches and putting a tripod in the middle of the street, I've photographed this scene before, but with a 45mm camera.  With Long John, it's much safer on the curb and the compression of the narrow angle makes the proximity of Boots Saloon and St. Mary's school and church more pronounced.


The Howard is a newly restored event and performance venue.  It used to be the Eagles Club.  When Andy was in high school the Madrigal Dinners were held there, the first gig of his band Independent Rain took place in one of the smaller rooms in the front and for a few years the Winter Farmer's Market was held there with a full bar available. It's visible for a mile with the First National Bank looming behind it when you look straight down School Street. As you get closer and the relative distance to them changes, the bank recedes until it's just a detail in the background.


I had noticed the stairway and various balconies on the side and came back to photograph them in the morning light.  When I saw the ladder leaning on the wall, the spirit of William Henry Fox Talbot overcame me. I parked my bike near the street, set up tripod and camera, and then walked into the parking lot toward the building to frame the picture. Turning around after closing the shutter, there were three workers I hadn't noticed sitting on the back of a furniture truck taking their coffee break, watching me. Assuming they wondered about the cardboard box, I told them I was taking a photograph.  One replied that he guessed that, and wondered of what.  I said "Lines, shapes, shadows. A historic building. It tells a story."  He said he could understand that.


Practically across the street from Merrill School is Firehouse No. 8, most recently housing a public relations firm and two posh apartments, and now for sale. I wonder if the tower is part of one of the apartments.


There's an apocryphal story that at the meeting to incorporate the city in 1853, it was named after Chief Oshkosh because the recent settlers from the east, who called their settlement Athens north of the river and Brooklyn to the south, split the ballot and the otherwise minority earlier French and Indian residents voted for the name of the chief and won. This memorial to Chief Oshkosh was created in 1926, 68 years after his death. It's currently being restored.  There's some doubt that it's his body buried there and just about everything about whole memorial is erroneous.  He had a pretty challenging life. In 1827, The U.S. Government got impatient dealing with a loose conglomeration of Menominee leaders spread over half of Wisconsin and appointed him chief so he's the one who shows up on some pretty sketchy treaties.  He did keep his people from being relocated to Minnesota and on the reservation he negotiated for, set up a sustainable logging operation which is still running.  Later in life, he got pretty disillusioned and died in a bar fight. In an ironic twist, between the logging and casinos, the tribe has done quite well in the 21st century and purchased the naming rights to the new Menominee Nation Arena on the south side.


So did the extra layers of paint fix the problem with my negatives? I'm not sure. The dense areas on the bottom are gone, but there were a few negatives that had the issue at the top and overall fogging.  I now think what's going on is plain old fashioned overexposed skies being diffracted by the smaller than optimum pinhole.  I did the digital equivalent of burning through the density and using a number 4 filter and got some kind of dreamy looking scenes people often associate with pinhole.

I wanted to show both sides of the north inlet to Miller's Bay but I missed and you can just barely see the tip of Ames Point on the left.


The south end of Miller's Bay is enclosed by Monkey Island, a settling pond for the city's water supply.  There's a second inlet between it and the park.


All with Long John Pinhole. .33mm pinholes - one on-axis with the film plane and one 12mm above the axis - 120mm from a 6x6cm frame on Ilford HP-5 developed in Rodinal 1:50.