Pentax AF540FGZ Specifications, Type, 85mm, 70mm, 50mm, 35mm, 20mm, 85mm, 70mm, 50mm, 35mm, 20mm, (M1/2), (M1/4), (M1/8), (M1/2), (M1/4), (M1/8), (M1/16), (M1/32), (M1/64)

Specifications

Type		Clip-on, TTL auto zoom flash unit with serial control
Guide No.		Maximum 54 (ISO 100/m). In manual mode, seven-step adjustment from M1/1 to M1/64. The
		focal lengths in the table below are for 35 mm single lens reflex cameras. (when using 35mm
		format camera)				*Wide-angle panel used
	(ISO 100)
		Focal Length (Zoom position)	85mm	70mm	50mm	35mm	28mm	24mm	20mm*
		(M1/1) (=FULL)	54	50	45	39	35	32	21
		(M1/2)	38	35	32	27.5	24.5	22.5	14.5
		(M1/4)	27	24.5	22.5	19.5	17	16	10
		(M1/8)	19	17	16	13.5	12	11	7
		(M1/16)	13.5	12	11	9.5	8.5	7.5	5
		(M1/32)	9.5	8.5	8	6.5	6	5	3.5
		(M1/64)	6.7	6	5.6	4.6	4.2	3.5	2.4
	(ISO 200)
		Focal Length (Zoom position)	85mm	70mm	50mm	35mm	28mm	24mm	20mm*
		(M1/1) (=FULL)	76	71	64	55	49	45	30
		(M1/2)	54	50	45	39	35	32	21
		(M1/4)	38	35	32	27.5	24.5	22.5	14.5
		(M1/8)	27	24.5	22.5	19.5	17	16	10
		(M1/16)	19	17	16	13.5	12	11	7
		(M1/32)	13.5	12	11	9.5	8.5	7.5	5
		(M1/64)	9.5	8.5	8	6.5	6	5	3.5

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