What do we want: Increased speed, resolution, contrast or DOE?

Details What do we want: Increased speed, resolution, contrast or DOE? What do we want: Increased speed, resolution, contrast or DOE?

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984asph.conf..119c&link_type=abstract

In its Astron. Phot. 1984 p 119-133 (SEE N85-16102 07-35)

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Astronomical Photography, Photographic Emulsions, Product Development, Schmidt Telescopes, User Requirements, Image Contrast, Image Resolution, Photosensitivity

Scientific paper

Application of tabular grain emulsions to astronomical photography with large Schmidt telescopes is discussed. The greatest astronomical gains would come from a finer grain emulsion, but with speed no slower than that of IIIa emulsions, especially when used on large Schmidt telescopes. Any new emulsion should be designed with the requirements of fast automatic plate measuring machines in mind; for example the best way of reaching faint limits should be by adding data from many separate plates, each exposed to the density which maximizes the DOE. There are practical advantages in having simply a faster version of IIIa-J preferably with a range of other spectral sensitizations for relatively slow telescopes with large plate scales, or for small telescopes with imperfect guiding systems.

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