Learning Objective 2
Experimentation
with Lenses.
2.2 Use lens-based
equipment for required purposes.
Above is a test sheets for working out
the timing for development of the photograph. To take this image we used a
medium format camera.
Medium
format has traditionally
referred to a film format in still photography and the related cameras and equipment
that use that film. Generally, the term applies to film and digital cameras
that record images on media larger than 24 by 36 mm (full-frame) (used in 35 mm photography), but smaller than 4 by
5 inches (which is considered to be large-format
photography).
The top of the test sheet 25 seconds
then it goes down 20 seconds, 15 seconds 10 seconds ending with 5 seconds. I
then used this test sheet to work out how long I needed to exposure my photo
paper to the light and on this test I decided that an exposure time of around 7
seconds would be perfect for the development of this negative.
This is the result
from exposing my photo paper for 7 seconds. This image was taken and then
development in the dark room by me.
However on using
the twin lenses camera we did encounter a few problems when it came to the
development of the images as the photo paper unfortunately was fogged meaning
that it was exposed to natural light photo paper can only be exposed to red
light without being fogged, but when starting the development process me and my
work partner Aylen we found that the paper was unsuitable to be used.
Below are the results
of the fogged paper when trying several times to complete a test sheet.
I
also used my DSLR to take photos to get a feel for the camera and to just mess
around with the settings so that I can confidently go out on shoot using my
35mm lens.
This
was taken on a test shoot day down in Westminster, London.
Here
are few photos from my test day. I was aiming for correct exposure throughout
the shoot, meaning I was getting the correct amount of light for the sensor.
Again with my 35mm lens.
Digital
single-lens reflex cameras (also named digital SLR
or DSLR) are digital cameras combining the parts of a single-lens reflex camera (SLR) and a digital camera back, replacing the photographic
film. The reflex design scheme is the primary difference between a DSLR and
other digital cameras. In the reflex design scheme, light travels through a
single lens and a mirror is used to reflect a portion of that light through the
view finder - hence the name Single Lens Reflex. The image that is seen through
the viewfinder
is also the image that is captured by the camera's
sensor. Many lenses are mountable,
"diaphragm-and-meter-compatible", on modern DSLRs and on older film
SLRs that use the same lens mount. However, when lenses designed for 35 mm
film or equivalently sized digital image sensors are used on DSLRs with smaller
sized sensors, the image is effectively cropped and the lens appears to have a
longer focal length than its stated focal length. Most DSLR manufacturers have
introduced lines of lenses with image circles optimized for the smaller sensors
and focal lengths equivalent to those generally offered for existing 35 mm
mount DSLRs, mostly in the wide angle range. These lenses tend not to be
completely compatible with full frame sensors or 35 mm film because of the
smaller imaging circle and, with some Canon EF-S lenses, interfere with the reflex
mirrors on full-frame bodies.
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