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111_01_intro

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by

meg mulloy

on 28 September 2016

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Transcript of 111_01_intro

welcome to large format photography
let's review some info you should already know
shutter speeds
they control what in an image?
which is faster: 1/60 or 1/500?
apertures
a.k.a. what?
which is wider (a bigger opening): f/22 or f/ 5.6?
what does f/stop affect in an image?
which has more depth of field: f/4 or f/32?
ISOs
what does ISO indicate?
how would you describe it?
what is an advantage to using a higher ISO?
what is a disadvantage to using a higher ISO?
as a general rule, how slow can you go
without needing a tripod?
equivalent exposures
if my meter tells me what proper exposure is why would i use an equivalent exposure?
if i am exposing at 1/125 @ f/8 and i want to blur out my background, would i want to use f/4 or f/22?
if i did that and didn't change my shutter speed would my image be overexposed or underexposed?
would i speed up or slow down my shutter speed?
so my equivalent exposure to
1/125 @ f/8 would be
1/500 @ f/4

i OPENED UP 2 stops with my aperture to make my depth of field shallower;
so i had to SPEED UP my shutter speed by
2 stops to cut the amount of time the light was coming through the lens.
understanding ISO and the mechanics of
exposure are REALLY important when working with film!
it's not like digital.
you can't just delete a badly exposed image.
every exposure costs
time and money
(shooting film is really fun, though, so get excited!)
ok...so what else is different about this class, besides shooting film?
THE CAMERA!
that's ansel adams,
shooting from the roof of his car with an
8x10 large format camera
doesn't look like your SLR, huh?
doesn't work like it, either
in some ways the large format camera is just like the camera obscura (the prototype for what we use today)
in other ways, it is WAY more sophisticated than an SLR
important differences:
1. how light travels through the camera

2. how the image looks to you when you're composing your shot
here's a modern 4x5 camera--
just like what we'll use in this class

3. how you can manipulate your image...

(more on that later)

the 4 parts of the large format camera:
front standard
rear standard
bellows
monorail

the 3 components of exposure are:
shutter speed
aperture
ISO
1 stop slower shutter speed OR 1 stop wider aperture = ______ the amount of light

1 stop faster shutter speed OR 1 stop smaller aperture = ______ the amount of light

1/60th of a second
you need to know your apertures in thirds of stops:
f/5.6 f/8 f/11 f/16 f/22 f/32 f/45 f/64
f/6.3 f/9 f/12.5 f/18 f/25 f/36 f/50
f/7.1 f/10 f/14 f/20 f/28 f/40 f/56
there are 3 types of film:

Black and White Negative
Color Negative
Color Positive (a.k.a. transparencies or chromes)

film has an ISO (aka film speed) just like DSLRs--but it can't be changed!

Lower ISO=slower film / Higher ISO=faster film

EI: Exposure Index
Even though a film might be advertised as having an ISO of 100 the film might behave as if it has an ISO of 80.

Film grain shows up with higher ISOs.
Film is made up of silver halides that respond to light. The higher the ISO the bigger the grains of silver halides and the grainier the film.

3 Factors Control Film Processing:
TIME
TEMPERATURE
AGITATION,
meaning moving the film canister around during processing to keep air bubbles from settling on the film

unlike in SLR cameras, large format cameras don't have a mirror and a pentaprism to make the image appear right-side up when looking through the viewfinder
without the mirror and pentaprism, your image will look upside down when you look through the ground glass (equivalent to the viewfinder) of a large format camera
Other components necessary for shooting with the 4x5:

Loupe: for aid in focusing
Light meter: because there is no internal light meter
Film holders: for protecting your film from light between storage and exposure inside the camera
Dark cloth: to cut the ambient light
Cable Release: to avoid having to touch the lens board during exposure

4 Camera Movements:
Rise/Fall
Lateral Shift
Swing
Tilt

Rise/Fall and Lateral Shift affect composition and image placement on the film.

Swing and Tilt affect convergence and distortion.
Full transcript