Transactions of the Society of Motion Picture Engineers (1922)

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DISCUSSION Mr. Cook: Just as a matter of possible interest to Mr. Wyckoff, and any other members who have a similar problem, I may say that the safety standard interests have built a number of optical printing machines. The necessity of the industry required an optical printer for making direct reduction prints from professional standard negatives. These printers, if made with a sufficient focal adjustment are very convenient enlargers as well as reducers, and in one laboratory that I know of, we have done just what Mr. Wyckoff is desirous of having made possible. That is, we have enlarged a section of professional standard negative of a surgical operation, in which the camera was necessarily placed at some distance from the operation, and the field of the operation correspondingly limited in the negative. For clinical purposes, it was desired to make a close-up, or to enlarge that portion of the negative for closer study and analysis. In an optical printer it was very easy to take that negative (requesting the producer to outline in pencil that portion of the negative which he wished enlarged) and then by properly focusing the optical printer, that portion was enlarged to the full size of the frame. The result was a beautiful print for clinical study, in which the operation itself filled the full size of the screen and all the technique could be very easily followed. It might be mentioned that there are a number of laboratories now equipped with optical printers that are capable of doing this, and possibly Mr. Wyckoff, reading the discussion in the Transactions, will be interested to know that it is already possible. Mr. Jones : I should like to ask if this printer is on the market? Is it built commercially? Mr. Cook: Mr. Victor built twelve of them, which are distributed among different laboratories over the country. Inquiry addressed to Mr. Victor might bring an affirmative reply. 159