I think it helps to visualize the image plane. Moving either the
front or back of the camera is like extending the image beyond the
normal limits of the film. You select the part of the image you want.
This is where the lens and film planes remain parallel. When the lens or
film is tilted it really changes the direction the camera is pointing.
When either the image plane or lens plane is tilted it really also tilts
the object plane. The plane of focus really remains the same but is
tilted in space to the film plane cuts through it. The effects become
obvious if you have a good, wide coverage, lens on a camera with
adequate movements and play with them. I am not sure what movements are
available on the SL-66 (I don't have one). Tilting the lens or film
plane have different effects than moving them in parallel. The effect of
either on illumination becomes clearer when one pictures how the image,
object and lens plane interact.
I really MUST get my carpal tunnel problem fixed. I can hardly type
any more. UGH!!!
On 3/26/2017 5:33 PM, CarlosMFreaza wrote:
Yes John, I called it the Scheimpflug angle in my post, they are really the angles of the Scheimpflug principle, the Scheimpflug intersection is where the angles of the subject plane, the lens plane and the image plane have an intersection.
I watch the DOF effect whilst tilting the lens in the focusing screen directly, however you could lose some details sometimes because the screen loses luminosity for some areas according you tilt the lens, the Scheimpflug indicator cards can help for a better planning, I don't have the original transparent, it would be nice to have the 80mm lens indicator at least, I'll write you off list tomorrow, thank you very much John.
Carlos
2017-03-26 20:11 GMT-03:00 John Wild <jwild@xxxxxxxxxxxxxxxxxxxxxx <mailto:jwild@xxxxxxxxxxxxxxxxxxxxxx>>:
Carlos, that's a nice collection.
I'm sure you know that with the Scheimpflug principle, when
tilting the lens with respect to the film plane, the plane of
focus is no longerparallel to the film but, with respect to the
SL66, it leans forward like a piece of cardboard.
With the focus hood, being taller than the rest of the items it
goes above the plane of focus, a bit like the items being tilted
and submerged underwater but the top of the camera is above the
surface and so it is no longer in focus.
Do you have the Scheimpflug calculation cards for the SL66? I
think I have a spare if you would like one.
John
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<mailto:rollei_list-bounce@xxxxxxxxxxxxx>
<rollei_list-bounce@xxxxxxxxxxxxx
<mailto:rollei_list-bounce@xxxxxxxxxxxxx>> on behalf of
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*Sent:* 26 March 2017 12:35
*To:* rollei_list@xxxxxxxxxxxxx <mailto:rollei_list@xxxxxxxxxxxxx>
*Subject:* [rollei_list] Rollei SL66 Distagon 4/80
I took yesterday a photograph about the equipment my father often
used when he had photography as a hobby;it's from the '50s and I'm
still using it. The Rolleiflex 2,8C Xenotar and the Gossen
Sixtomat and the Walter Voss Diax IIb are in perfect working order.
The image was taken with the Rolleiflex SL66 CZ Distagon 4/80,
Kodak Tmax 100 developed with Romek PQ7 1:3. I used the camera
capability to tilt the lens, the 2,8C viewfinder hood is out of
focus slightly and its Xenotar lens is in focus, it happens due to
the Scheimpflug angle, I need a bit more of practice:
