how to use the sinar focussing aid?

[serge_chamulot]

this may be really stupid but I was wondering how to use the little

focussing aid on sinar camera's (near the backs fine focus) and

apart from that if it is worth using anyway. I can not quite figure it

out, and it seems to me that it should only be accurate for one

specific lens or focal length (there's a little '90' on mine so

perhaps this was meant for a 90mm?)

 

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thanks for any insight,

serge

[walter_glover]

Serge,

 

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The device on the Sinar focus knob is good for all focal lengths ...

it's shortcomings only really become apparent with very close

focussing (macro).

 

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There are usually two scales printed around the focus drive knob

- say, 4x5 & 6x9. Refer to the apropriate scale for the format you

are using.

 

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First focus on a the furthest point that you wish to appear sharp

and move the '0' on the scale to the index mark.

 

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Next focus on the near point that you want sharp. Note the

aperture value at the index mark - this is the aperture to shoot at.

 

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Now turn the focus drive back 2 f-stops on the scale. At this point

the depth of field at the indicated aperture will be sufficient for a

10x8 print from a 4x5 neg. to be viewed at a normal (arm's

length) distance from the print.

 

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The Tilt and Swing angle scales work differently on the F series

and the P series but since you don't mention which model it is I

can't render any further advice at this stage.

 

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Cheers ... Walter

[edward_kang]

<img src=http://www.nd.edu/~ekang/forum/lfq/page1.jpg>

 

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<img src=http://www.nd.edu/~ekang/forum/lfq/page2.jpg>

 

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<img src=http://www.nd.edu/~ekang/forum/lfq/page3.jpg>

[edward_kang]

Strange, here's another try.

 

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<img src=http://www.nd.edu/~ekang/forum/lfq/page1.jpg>

 

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<img src=http://www.nd.edu/~ekang/forum/lfq/page2.jpg>

 

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<img src=http://www.nd.edu/~ekang/forum/lfq/page3.jpg>

[edward_kang]

test

[serge_chamulot]

thanks so much for the clear answers and scans. I have an F

and P2 but can not find the tilt aid (obviously the F never had one

but the P2 should?). the P2 focus aid only has the 4x5' marks by

the way

 

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serge

[adam_friedberg]

the p/p2 doesn't have the tilt aid, the f1/f2 does. i'm not sure about

the f.

[andy_ongun]

As far as the tilt, swing and DOF adjustments for the P2 and F go,

check out the Sinar Bron site at www.sinarbron.com. It is explained

in detail there.

[ellis_vener_photography]

The Sinar P (and the P2) definitely has a tilt (and swing) aid

built-in to the camera. this is part and parcel of the assymmetric

tilt and swing mechanism for the camera. The Sinar F cameras

needan external scale to calculate tilt and swing angles because

they are base tilt designs, not the superior assymmetric design

found in the P, C and X series of Sinar view cameras.

[adam_friedberg]

i assumed serge was referring to the external scale.