· To obtain special effect by doubling the exposure, match the upper curve of the
O to the meter needle. To decease the exposure by one setting, match the lower
curve of the O to the needle.
· When in case of aperture pre-selection method the needles fail to coincide even
when the shutter speed dial is turned, set the shutter speed to the closest setting
and then turn the diaphragm setting lever until the needles are perfectly matched.
Do not under any circumstances adjust the shutter - speed dial to an intermediate
setting.
AUTOMATIC DIAPHRAGM AND DEPTH-OF FIELD PREVIEW LEVER.
· The fully automatic diaphragm of Miranda lenses is of special construction which keeps the lens wide open all the time to provide a
very bright viewfinder image for easy picture composition and speedy adjustment of focus.
· When the shutter button is pressed, the diaphragm automatically closes down to the aperture to which the lens has been set beforehand
and makes it work only at that aperture. But when the shutter closes, the diaphragm automatically reopens.
· The viewing can therefore be done at fully open aperture at all times. But if one desires to actually check the effects of a given aperture
on the image, the special lever on the lens barrel can be used. This preview ; lever when depressed stops down the diaphragm temporarily
to the aperture which has been pre-selected so that the depth of field and background blurs can be directly checked.
· Miranda's fully automatic diaphragm system is used not only in the standard 50mm lens but also in all other Auto-Miranda lenses. As
with the standard lens, they permit viewing at full aperture, no matter what f-stop has been pre-set for the actual shooting. In snapshots
particularly, it saves the trouble of having to open the aperture for focusing and to close it down for the shot.
4www.butkus.org
· When changing the lens, it makes no difference whether the aperture is stopped down or not, for once it is mounted on the camera the
aperture automatically opens fully.
The mirror is of course of the quick-return type which causes an extremely short viewfinder black-out during shutter action. Due to its
original construction, the mirror mechanism on MIRANDA Sensorex is particularly quick acting and the viewfinder black-out at shutter
speeds of 1/15 second or faster lasts no longer than the blinking of an eye.
· The coupled action between the automatic diaphragm and the mirror too is very smooth, so that when the shutter button is pressed:
(I) The diaphragm closes down to the preset aperture,
(2) Almost simultaneously the mirror swings up,
(3) Followed by opening of the shutter curtains and film exposure
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