Maintenance Report

What is shutter speed?




at first

I’m sorry

Because we can’t speak english

I am using DeepL translate, so it may be a strange sentence,

but I would like you to understand

Thank you

In this issue.
I will write about shutter speed.
(I will refer to this SLR camera that is for sale)

Canonflex RP+CANOMATIC R 50mm f/1.8

Click here for the URL of this camera sales site

Shutter speed is
The shutter speed is the speed between the opening and
closing of the shutter.

By changing the speed, the light entering the
film is adjusted.

Bottom photo
Position of the shutter release button and shutter dial as seen
from the top of the camera.

Turn the shutter release dial to change the speed.

With this camera
X (orange), B , and numbers from 1 to 1000 are marked.

First, the speed of the numbers 1 to 1000,

1 is 1/1 second (1 second)
60 is 1/60 second (0.6 second)
1000 represents 1/1000 of a second (0.001 seconds)

The higher the number, the faster the speed.

(1) When the shutter speed is slow

When the shutter speed is slow (at 1)
This is before the shutter is released.

When the shutter was released
The shutter opens to let in more light.

Shutters closed.

(2) When the shutter speed is high

When the shutter speed is fast (at 500)
Before the shutter fires

Beginning of the shutter release.
Starts moving fast!

The shutter is so super fast that you can only see half of it.
This reduces the amount of light.

Shutters closed.

I’m talking about the non-numeric characters on the shutter dial.

“X” (orange) is the speed position when shooting with a strobe

“B” is called bulb, which means that the shutter opens while the shutter release button is pressed.

When the shutter release button is released, the shutter closes.

Therefore, the amount of light can be determined by the
shutter release button.

And shutter speed is related to aperture.

There is a separate column on aperture.

Please see there.

What is aperture?

Adjust the amount of light from the lens.
While adjusting the aperture

Further adjust the shutter speed to send the appropriate amount
of light to the film.

These are some of the things we have written about
ISO sensitivity.

I will write about “exposure” in the next issue.

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Writer Takashi Okumura