camera; taking film to its limit and beyond - color transparency film
Written by john durniakjune 22,1986, this is a digital version of an article from The Times Print Archive, before its online publication began in 1996.
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Almost all photography works can work automatically except for movies.
No film can adjust itself to produce a print of perfect exposure.
But photographers can increase their creation.
By mastering a variety of techniques in the darkroom to handle movies, high quality printing.
An important technology is "push ".
It includes over-developed movies.
Let it stay in the developer longer than suggested --
To make up for the fact that it is underexposed.
Underexposure is in turn used to take subjects with insufficient light, while it is impossible to take high-quality photos with your hands
If the film is exposed according to the normal ISO level, keep the camera.
In this case, black and white film with grade 400 ISO may be exposed at ISO 600, 800 or even 1200.
Ideally, photographers should follow the manufacturer's guidelines when exposing and handling movies.
But since not all the photos appear under normal lighting, the photographer will have to turn to push sooner or later.
There is a major drawback to advertising push.
When the photographer deviates from the processing advice issued by the manufacturer, the quality of the picture may be affected.
Manufacturers try to protect the image of their products by issuing conservative guidelines, but photographers tend to do whatever is necessary to get the image they want, regardless of the standards.
More and more manufacturers are beginning to admit that serious photographers may have to push movies in order to take an important photo or complete a task, most of which contain suggestions from manufacturers about pushing.
Authoritative advertising on promoting the Black themeand-
White film is directed by Barry Sinclair, a research chemist and executive at Ilford. , a Paramus, N. J.
A company that produces photographic equipment
A film in black and white, sir.
Sinclair suggested that the photographer be careful to hurt the image out of ignorance.
Problems may arise, he said, because many photographers do not know how to make accurate exposure readings.
They tend to overexpose the film and then overdevelop, resulting in pictures with too much contrast.
Overexposure can cause a drop in clarity, and everything else will be lost, except to ensure that the details of the highlighted area will be lost.
It's usually black. and-
White film can be exposed twice as much as its ISO grade-
For example, 400 ISO film can be used in 800 ISO-
No sacrifice of quality. According to Mr.
400 ISO black-Sinclairand-
The exposure of the white film cannot exceed 1200 ISO.
Nevertheless, some photographers exposed it on a standard of 3200 or even 6400 ISO without realizing how much damage they did to the negatives.
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Pushing color negatives is a very different process.
Until about a year ago, color negatives were not readily available.
However, this situation is changing due to the development of new technologies for rattan color and Kodak "t" grain film.
Soon, photographers may push color negatives like they do with making color-transparent films. (
It is very complicated to push color transparent film, and photographers who wish to do so should consult manufacturers for instructions on color transparent film packaging. )
A key issue related to push is that most cameras do not provide the shutter speed shown on the dial, especially at high shutter speed.
For example, a 1/1000 setting may only produce a shutter speed of 1/500.
Since inaccurate shutter speed eliminates any chance of getting the maximum quality from a bad light, photographers who often push film shots should check the camera's shutter speed on a regular basis.
When pushing the film, the choice of developers is very important.
Different developers influence movies in different ways;
A good developer driving film development is Microphen.
Although the film is usually processed for 7 or 8 minutes, it can be processed for up to 13 minutes using Microphen without losing quality.
Promicrol, Accufine and Diafine are other great developers.
All of these products contain push information.
Here are some tips to keep in mind when pushing the film: before shooting, check if there is a faster film suitable for your working conditions.
When shooting a movie to be pushed, try to avoid high
In the soft and uniform light, the subjects were more favored than the subjects.
Also try to avoid subjects with severe shadows, which is where the impact of the push can cause losses.
The details in the shadow can be built to a point;
After that, only the results of the density make it difficult to print the negative.
It's better to do it yourself instead of having the lab do it for you.
In this way, you will have maximum control.
However, if you are using a lab, please select a lab that understands your needs and arrange the work in advance.
When the lab pushes the film, it is recommended to shoot some test rolls in advance
Under the lighting conditions you will use-
Handle the film.
The advertisement carefully selects your movie.
Use fresh movies to avoid cheap
Design Brand films or films sold abroad.
A version of this article was printed on page 1001047 of the National edition on June 22, 1986 with the title: Camera;
Push the film to its limits and limits.