Pentax Optio A40 Operating Manual page 30

Approximate Recordable Time by Size (Recorded Pixels) and
Quality
Quality Level
Recorded Pixels
1
640 (640×480)
320 (320×240)
The default setting is C.
• The table above indicates the approximate recording times when using a 1GB SD
Memory Card.
• The table above is based on standard shooting conditions specified by
PENTAX and may vary depending on the subject, shooting conditions, capture
mode, SD Memory Card, etc.
28
C
Best
46 min. 0 sec.
177 min. 56 sec.
D
Better
57 min. 38 sec.
221 min. 3 sec.
E
Good
69 min. 11 sec.
254 min. 52 sec.