Nikon SB-22 instruction manual Guide Number, Guide number at various film speeds

The maximum number of flashes for continuous shooting are listed below.

Maximum Frames

Batteriesnumber of per flashes' second

Guide Number

In M or MD mode, without referring to the aperture se- lection/shooting distance range panel, you can de- termine the f/stop by using the following equation:

guide number

AA-type alkaline-manganese batteries inside 88-22

AA-type alkaline-manganese batteries inside 88-22 plus C-type alka line-manganese batteries inside optional DC Unit 8D-7"

461ps

10 61ps

40'" 4.2 1ps

f/stop=b"

flash-to- su lect distance

See the table for guide numbers at various film speeds.

Guide number at various film speeds

•Don't begin the continuous sequence until the ready-light has been lit for approx. 30 seconds (with fresh batteries at 20°C [68 °FJ).

••For detaits about the SD -7, see page 52.

•••More flashes possible, but never fire the flash more than 40 times. Before firing the flash again, let it rest for at least 10 minutes.

Note: In M or TTL automatic modes, or Al1A2 modes (non- TTL automatic modes), do not fire the flash more than 10 frames without allowing the flash to rest at least 10 minutes. Even for fewer flashes, be sure to allow the SB-22 a few minutes to rest. Using the flash continuousty without cooling causes malfunction.

Unit ·m(lt)

With wide -flash

Normal

adapter

Mode

M (manual) MD M (manual) MD

selector

1600 100 (328) 32 (105) 70 (230) 22(72)

800 70 (230) 22 (72) 50 (164) 16 (52)

0400 50 (164) 16 (52) 35 (115) 11 (36)

!!1	200	36 (1 18)	11 (36)		25 (82)		8 (26)
	100	25 (82)	8	(26)	18	(59)	5.6( 18)
	50	18 (59)	5.6	(18)	125(41)		4 (13)
	25	125 (41)	4	(13)	9	(30)	2.8 (9)

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