Mr. Eisenberg.

Have you prepared a photograph of that aperture at the film plane?

Mr. Shaneyfelt.

Yes; I have an enlarged photograph of that aperture, that I made so that it would better show the back of the camera, with the back removed to show the film plane opening or aperture.

Mr. Eisenberg.

Did you take this photograph of the back of the camera yourself, Mr. Shaneyfelt?

Mr. Shaneyfelt.

It was made under my supervision.

Mr. Eisenberg.

May I have this admitted as 751?

Mr. Mccloy.

It may be admitted.
(Commission Exhibit No. 751 was marked and received in evidence.)

Mr. Eisenberg.

What is the enlargement here, by the way?

Mr. Shaneyfelt.

Approximately two and a half times.

Mr. Eisenberg.

Now, having reference to the chart, Mr. Shaneyfelt, could you explain it in a little more detail, the basis of your examination?

Mr. Shaneyfelt.

Yes; the basis of the examination was a close microscopic study of the negative made in the camera to study the shadowgraph that is made of the edge of the aperture.
As the film is placed across the aperture of the camera, and the shutter is opened, light comes through and exposes the film only in the opening within the edges. Where the film is out over the edges of the aperture it is not exposed, and your result is an exposed negative with a clear edge, and on the negative then, the edges of that exposure of the photograph, are actually shadowgraphs of the edges of the aperture.

Mr. Eisenberg.

Could you circle or mark with arrows the edges you are referring to as "these edges" or "this edge," that is, the edges of the aperture opening at the plane of the film?

Mr. Shaneyfelt.

Yes.

Representative Ford.

This would be true in every picture taken?

Mr. Shaneyfelt.

That would be true of every picture taken and is true of virtually every camera--every roll-film type camera. It would not be true of a press-type camera where the film is loaded into separate holders; then the holder becomes the thing that will leave identifying characteristics.
On any 35 mm. or Leica camera, roll-film camera, box cameras of all types, having an arrangement, where the film goes across an opening leaving an exposed area at the aperture and unexposed area around the aperture, this would be true.

Mr. Eisenberg.

When you say "virtually every camera" you are including every type of camera with this type of aperture?

Mr. Shaneyfelt.

Yes; I would include every camera with this type of film arrangement and aperture.

Mr. Eisenberg.

You held up a negative before----

The Chairman.

Just a moment, gentlemen, you will excuse me, I must go over to the Court now. You will be able to proceed the rest of the day, will you?
Fine. I will be back as soon as I finish.
(At this point the Chief Justice left the hearing room.)

Mr. Eisenberg.

Mr. Shaneyfelt, you were holding up a negative which appears to be a negative of a simulated photograph you showed us before, Exhibit 748. Is it such a negative?

Mr. Shaneyfelt.

It is true. That is the negative from which that exhibit was made. The negative was exposed in the camera which is marked Commission Exhibit No. 750. I exposed it myself.

Mr. Eisenberg.

Mr. Chairman, may I have this negative admitted as 752?

Mr. Mccloy.

It may be admitted. That is the negative from which that exhibit was made?

Mr. Shaneyfelt.

Yes.
(Commission Exhibit No. 752 was marked and received in evidence.)

Mr. Mccloy.

And you took that picture?

Mr. Shaneyfelt.

I took that picture myself.

Representative Ford.

Is this a recognized technique or procedure used in or among experts such as yourself?