The Pentax AF-540 FGZ is a professional flash unit that is fully compatible with the entire line of Pentax cameras, from the original 67 to 645N II & MZ-S, MZ-SD or digital *ist, K100D, K110D and K10D series cameras. It will support advanced flash functions of even the latest digital SLR camera models.

Full manual control of flash output is possible, even in slave mode, or use the TTL flash capabilities of the camera its mounted on to achieve painless exposure with every aperture. The pop-up flash incorporated into many Pentax 35mm SLRs can be used to trigger the AF-540 FGZ wirelessly, and when combined with the MZ-SD or *ist D camera this is done with TTL metering!

NOTE: Off-camera corded TTL or P-TTL flash with the AF-540 FGZ requires two pieces; Hot Shoe Adapter F or Fg (catalog #31022 & 31045 respectively), and Extension Cord F5P or Extension Cord F5PL (37347 & 37349 respectively).

Features

• Autozoom head covers from 24-85mm (20mm wideangle adapter included)
• Compatible with every Pentax camera, but has special features when used with MZ-S/MZ-SD or *ist series cameras:
  • P-TTL Preflash evaluative metering
  • HSS Focal plane high-speed flash sync
  • Wireless TTL capability with ratio lighting control & four transmission channels
• Second-curtain sync
• Illuminated LCD panel
• AF Infared lowlight assistance illumination

Specifications

Type:	Hot Shoe Clip-on TTL auto zoom flash unit with serial control
Guide Number:	Feet: With ISO 100, Manual: - 177 (85mm) - 164 (70mm) - 148 (50mm) - 128 (35mm) - 115 (28mm) - 105 (24mm) - 69 (20mm*) (* w/wide angle panel)
Zoom Range:	85mm to 24/20mm* (* w/wide angle panel)
Bounce Capability:	Up: -10o, 0o, 30o, 45o, 60o, 75o, 90o
Swivel Capability:	Right: 0o, 30o, 60o, 90o, 120o, 150o, 180o Left: 0o, 30o, 60o, 90o, 135o
Recycle Time:	Alkaline (LR6) Approx. 6 sec. Approx. 200 Flashes Nickel hydroxide (Ni-MH) Approx. 6 sec. Approx. 250 Flashes Lithium (FR6) Approx. 6 sec. Approx. 350 Flashes
Special Features:	Consecutive Discharge: Approx. 2 frames/sec for 50 pictures, at [M 1/64] output (with alkaline LR6 batteries)
Other	Color Temperature: Daylight
Lighting Angle	Zooming position: 85mm: Vertical Coverage: 23deg, Horizontal: 31deg, - 70mm: V: 26deg H: 36deg - 50mm: V: 34deg H: 46deg - 35mm: V: 45deg H: 60deg - 28mm: V: 53deg H: 70deg - 24mm: V: 60deg H: 78deg - 20mm*: V: 85deg H: 98deg (w/wide angle panel)
AF Spotbeam	Red beam emitted under low light or low-contrast conditions
Compatible Film Speed	ISO 25 - 1600
Flash Modes	P-TTL auto, TTL auto, auto, manual
Flash Exposure Compensation	In P-TTL mode -3.0 to +1.0 steps (0.5 step increments)
Flash Amount Setting	With wireless slave: [1/1, 2/3, 1 / 2, 1 / 3] Manual: [1/1, 1 / 2, 1 / 4, 1 / 8, 1 / 16, 1 / 32, 1/64]
Flash Sync Mode	Leading-shutter-curtain sync, trailing-shutter-curtain sync, contrast-control-sync, high-speed-sync, modeling flash
Wireless Flash	Control system: Optical pulse transmission Wireless position: Master (M), control (C), slave (S) Channels: 1 through 4 Compatible modes: P-TTL, auto (A), manual (M) Effective range: Approx. 13ft (according to Pentax testing conditions)
Power Saving	Automatic power-off: After approx. 3 min. of non-operation with the power in theON position, 6 min. in Auto, 1 hour in wireless mode
Red-Eye Reduction	Operates with autofocus cameras equipped with red-eye reduction feature
Modeling Flash	Modeling button fires flash consecutively for 1 second
Wide Angle Panel	Pull out manually, flash zoom position automatically sets to 20mm
Catchlight Panel	Pull out manually
LCD Panel Illumination	Light button illuminates the LCD panel for about 10 seconds, or press button again to turn off
Power Source	Size-AA batteries x 4, Alkaline LR6, Nickel Hydroxide (Ni-MH), or Lithium FR6
Dimensions	3.0"x5.6"x4.2"
Weight without batteries	13.4 oz (380 g) without batteries

Includes

• Pentax AF-540 FGZ P-TTL Shoe Mount Flash
• Case