LESSON 2
EXERCISE SOLUTIONS
1.
A pinhole in a piece of thin metal or black paper, (para 2-3).
2.
FALSE, (para 2-3).
3.
True, (para 2-4c).
4.
(L to R) c, a, d, b, e, f, (para 2-5).
5.
Positive lenses, a, d; negative lenses, b, c; (para 2-5a and b).
6.
The plane in which the image is sharply formed, (para 2-6a).
7.
The focal length, (para 2-6b).
8.
Focal length, (para 2-6c).
9.
Lens aperture, (para 2-7b).
10.
Circle of good definition, (para 2-9).
11.
450 to 550, (para 2-9a).
12.
Focal length of lens, film size, and subject distance, (para 2-10b).
13.
Diagonal of the negative, (para 2-10b(1)).
14.
a.
Long focal length lens, (para 2-1Ob (4) fig 2-17)).
15.
a.
43mm.
b.
160mm.
c.
288mm, (para 2-12b table 2-3).
16.
A point of light that has been enlarged due to incorrect focus, (para 2-
13c).
17.
Focusing, lens speed, photographic prints, (para 2-13e(1)(2)(3))
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