Graflex RB Series "B"

and

AUTO GRAFLEX Jr

Curtain Aperture

x

1/8

3/8

3/4

1

350

110

40

10

2

440

135

50

15

3

550

160

65

20

4

680

195

75

25

5

825

235

80

30

6

1000

295

90

35

Former & Schwing Division

Eastmann Kodak Co.

Rochester N.Y

Setting The Curtain Aperture

The letters mentioned in this manual can be found stamped on the particular parts on the camera...

Time Exposures

Press down lever  H and slide the bar D to the right, exposing T, indicating time exposures. Wind the curtain until the letter T is registered at F. After focusing the image, release the mirror, ands commence the exposure by a gentle, backward pressure on button M. At the expiration of the required time, terminate the exposure by a second pressure on button M.

 

The Mirror Setting Lever H, just under the aperture control A, is extremely important because the curtain cannot move (except when set for Time) until mirror has been set by pressing this level down and back (toward the rear of the camera)

The curtain aperture or slit, to be used for an exposure is set by the aperture control A and the tension (which determines the speed with which the curtain travels, is set by tension control B.

Windows F and G next to their respective controls, show the settings of their adjustments. Turning A counter-clockwise (Clockwise in the Auto Jr.) with the arrow, winds to narrower slits, moving curtain release lever M toward the back of the camera allows the curtain to unwind to wider slits. The figures on the scale showing in window F indicate the aperture that will next pass across the film when the curtain is released . When set on T (for Time exposure), releasing the shutter places the slit O (Open) in front of the film exposing the entire film at the same time. Operating the curtain release M a second time, closes the curtain.

In the 2 1/4 x 3 1/4 R.B. Series B, it is necessary to wind A two clicks between settings; the number exactly centred in F, indicates the aperture for which is set. The curtain is closed when any number except O (open) is centred in F.

The correct aperture and tension on the shutter plate:

Locate 1/135 on the plate; reading straight up, you’ll find aperture 3/8, reading straight to the left you’ll find tension 5.

To make an Instant Exposure:

After the shutter has been set and the image one the Ground Glass focusing Screen properly focused, the exposure is made by one gentle, downward pressure on the release lever, located on the forward left hand side of the camera body. The pressure on the lever simultaneously releases the mirror and the curtain. Slow instantaneous exposures of about 1/2 second can be made with the curtain set at O ( full opening) and tension no. 1. Pressure upon the shutter release causes the mirror to rise before the curtain drops, closing the exposure aperture.

 

Set the tension by rotating B or releasing it by repeatedly lifting up on button P, until the desired number or letter (5) in our example appears in window G

Set the curtain aperture by rotating A or releasing it with M until the desired number (B in our example) appears in window F. The aperture control A will not turn unless the mirror is down in focusing position.

Remove slide from film-holder, compose and focus on the ground glass and check the desired diaphragm.

Press slowly and steadily on release lever E with right thumb. This permits the mirror to rise clear of the field of the lens , its motion rotation lever M until it releases the curtain. The slit in the curtain then passes across the film and the exposure is made.

Reset the mirror by pressing back on H

Turn key A until B again appears in window F. Change film etc. etc...

 

Vertical and Horizontal Photos 

Press button X and revolve the back to vertical or horizontal or any intermediate position. This can be done without danger of fogging the plate or film when the dark slide is drawn.

Holders

All Graflex Attachments will interchange with the Plate Holder on Graflex cameras. Please keep in mind that plates are no more available. You may try to find the Graflex cut film sheet holder catalogue number 111211. It has the same shape as the plate holder but receives cut film sheets instead. The Graflex plate magazine is designed to carry 12 Glass plates or sheet film in metal sheaths.


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