Blog Langara Photo-Imaging Program – Photo 1118 with Tomo Tanaka

Langara Photo-Imaging Program – Photo 1118 with Tomo Tanaka


First binder I pulled out the the pile was Photo 1118 with Tomo Tanaka. Tomo’s classes were traditionally the more technical side of the program. At the end of this course I was able to:

  • use a B&W Densitometer
  • understand Bellows Compensation
  • properly expose and develop B&W Film
  • understand how focal plane and leaf shutters work
  • understand concept and formulas for depth of field
  • understand basic image reproduction formulas
  • understand angle of view for different camera formats and their formulas
  • understand inverse square law and the three cosine laws and how they apply to photography
  • be familiar with WHMIS
  • understand the fundamental differences between film and digital cameras
  • understand how various camera supports work

Some of the assignments included Calibrating light meters and thermometers to ensure proper exposure and development. Some of the tidbits I learned:

  • Sunny 16 Rule, In Sunny Weather Aperture f/16 and shutter speed reciprocal to ISO (ie; f/16 ISO 400 1/400th sec)
  • Basic Electricity 100v x 15amps = 1500W
  • Process of developing film, Develop -> Stop -> Fixer -> (at this point you can turn the lights on) Wash -> Hypo Clear -> Wash -> Photo-Flo -> Drying
  • Darkroom Printing, 10% difference is visible on the print, it will change another 10% when fully dried
  • Bellows Compensation, ((bellows draw mm^2)/(focal length of lens mm)^2) = Bellows Factor (BF)
  • logBF/log2=increase in exposure in terms of f stops
  • Equivalent Exposures, Difference between f/stops is ?2 (Doubles every second number; f/4, f/5.6, f/8, f/11, f/16, f/22)
  • Proper Tripod usage, don’t elevate centre column unless absolutely necessary
  • Shutters, minumum “safe” shutter speed for hand holding is 1/Focal Length of the lens (ie; 60mm lens would be 1/60th second)
  • Apertures, when the camera to subject distance is less than 10x the focal length we must consider “bellows factor”
  • Apertures, the shape of your aperture is the shape of your specular highlights
  • Camera-less printing assignment
  • B&W Kreonite Orientation, no fiber based paper allowed, total time dry to dry is 2.5 minutes
  • Inverse Square Law, 2x the distance = 1/4 the light
  • Angle of View, angle of view for a 50mm lens on a 35mm camera is 43.27?, the equivalent for a 4×5 camera is 193mm
  • Angle of View, ((Object Size/Distance to Object)=(Image Size/Focal Length))
  • Depth of field, …I’d write this equation out but you’d go cross eyed, check out the Wikipedia page instead
  • Hyperfocal distance, the closest distance that appears sharp when a lens is focused on infinity
  • Visible Spectrum of Light, RGB (additive/primary colors)

I know some/most of that looks like obscure gibberish but I partly wrote it down to have as a mental tweak for me to remember the bits a pieces I learn over the duration of this course. It was interesting going back through the material and reviewing the things I learned vs. what I actually use now in my Photography.

Let me know if you have an questions.

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