Pinhole Camera: RealitySoSubtle 6×17 Pano

Welcome to Big Mountain Photography!

Today, I present my first set of pinhole camera images using Kodak Porta 400 120-film.  If I had to guess, many people have not heard nor understand the use of pinhole cameras.

Here are four quick links to get up to speed: Pinhole Website Video Explanation Wikipedia Explanation Great Overview

Additionally, here are some images from four Pinhole Camera websites: Link 1    Link 2    Link 3     Link 4

Note: I’ve stopped posting individual images on Facebook as I’ve chosen to share not just an image, rather a story with a gallery of images.  We’d appreciate your patronage so please FOLLOW along.

RealitySoSubtle Pinhole 6×17 Pano Camera Link

Let me get the semi-technical questions out of the way.  Here’s the scoop:

RealitySoSubtle 6×17 Medium Format 120 Film Pinhole Camera

– The “Pinhole” is 300 microns (0.300mm) at f/233, 70mm focal length with a curved film plane to avoid corner vignetting and field of view 144deg x 41deg.
– I use an iPhone app, “Pinhole Assist” to Spot Meter (~20deg) plus includes film reciprocity considerations in the calculated exposure time in EVs.
– You get 4 Exposures per a roll of 120 MF film with the film numbers centered in the rear, red viewfinder at 2 ( 1 and 3 on the sides), then 5 (4 and 6 on the sides). 8 and lastly 11.

So how do you load the film, see video:  LOAD

So how do you take exposures, see video:  EXPOSE

So how do you process the scans:  TWO-OPTIONS

#1: Buy yourself a professional, home scanner, i.e. Epson v850 to scan the entire 6×17 negative either dry or wet.  This my medium term solution.

#2: Use a local lab with a Frontier or Noritsu by theFINDLab roll scanner yet there is a limit of 6×12 for a single image.  This is my current solution, not optimal given I must then stitch the images and correct for exposure difference in Photoshop.

Problems So Far Encountered

screen-shot-2017-01-10-at-7-59-59-pm
1) Loose fiber inside the camera resting on the negative.  Solution: Blowout the interior, thoroughly each time you change rolls of film.
screen-shot-2017-01-10-at-7-56-23-pm
2) Never get bumped my somebody at the time of exposure.  Solution: Check out your environment, 360 degrees to ensure you have up to a 120 sec. space without interruption.
screen-shot-2017-01-10-at-7-56-41-pm
3) Watch your fingers getting captured at the time of short exposures, this was ~3-second exposure.  Solution: Practice without film on a tripod proper opening and closing the sliding latch. The magnetic closing feature is tricky to open at first, again practice.  See EXPOSE

Photoshop Processing Approach with 2 Exposures

screen-shot-2017-01-10-at-8-01-49-pm
Here I’m not only stitching the two scanned images, the two different exposures have to be adjusted to match.  Plus, using a Photoshop Perspective Warp adjustment tool to get full, proper image halves to align.  Then a final crop to 16×7 aspect ratio.
screen-shot-2017-01-10-at-8-24-44-pm
Here I’m using the curves adjustment tool to adjust the LH image to match the RH image for exposure.
screen-shot-2017-01-10-at-8-27-55-pm
Lastly, after the exposure is adjusted and image transformed to align, an overall curves adjustment is applied to bring contrast to taste.

Eventually, I will secure an Epson flatbed scanner to do full 6×17 negative scans plus 6×6 / 6×7 negatives from my Fuji GF670 medium format camera.  The use of SilverFast and Digital ICE software to combat the removal of “dust” on color negatives is imperative.

Images from First Roll of Film

dashansheying-2665
“Temple Tank Post-Typhoon”
dashansheying-2662
“Sunset Upon Mylapore Temple Tank”
dashansheying-2666
“Leela Palace”

5 thoughts on “Pinhole Camera: RealitySoSubtle 6×17 Pano

  1. Hi Stuart

    I came here to browse a little and will come back for a more thorough look. I wanted to drop you a line to congratulate on these great images. I also have the Reality So Subtle 6×17 camera, though I have not really shot with yet other than some testing in Brussels. Your images reminded me that I should dig it out and go out with it again.

    Best wishes

    Dave

    1. Dave, Thanks for stopping by my photoblog. I like the 6×17 format as it somewhat the same field of view as we observe naturally. Maybe time for another video on the 617?

      1. Good thinking, I don’t think I made a field video yet, that might be a good place to start. Just uploading the video to introduce my charity project!

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