print above on the left is an approximately 4x6 inch enlargement of a
full 35mm frame. 4x6 is the standard "snapshot" enlargement size. The
photograph was taken from the distance of approximately a city block (about 90
meters or just under 300 feet) from the man on the balcony. The lens was a
Nikkor f2.8 180mm telephoto, a standard high-quality surveillance lens, at f8,
which is close to its optimum aperture.
Most 35mm negatives begin to show
grain, which degrades detail, when enlarged to 8x10 or 11x14 inches, or about 10x to 12x enlargement.
The detail above right is enlarged to approximately
35x. It is grainless.
The detail below is an
enlargement of 67x. Even at this extreme enlargement, grain does not
degrade image detail. The full frame enlarged to 67x would make a print
95" (almost 8 feet, 2.4m) wide. The enlargement was made with a condenser
enlarger, which accentuates grain. Loss of image detail is entirely due to the resolution
limits of the lenses that made the photograph.