About Us
The Professional's Source Since 1973
  • Help
  • 800.952.1815
Hello, Log InAccount & Orders
My Cart
Video Chat with a Photography Expert - Live

Pentax AF540FGZ II Flash

BH #PEAF540FGZ2 • MFR #30456
 33 reviews
Pentax AF540FGZ II Flash
Key Features
  • All Weather Construction
  • Compatible with Pentax P-TTL
  • Guide Number: 177' at ISO 100 and 85mm
  • Zoom Range: 24-85mm (20mm with Panel)
Complete your durable, rugged All Weather camera setup with the P-TTL capable AF540FGZ II Flash from Pentax which features 28 seals, including the hot shoe, that enable a reliable weather-resistant digital imaging system. This unit has a guide number of 177' at ISO 100 and 85mm along with a 35mm equivalent zoom range of 24-85mm, though the auto zoom function is compatible with smaller format Q-series mirrorless cameras, APS-C DSLRs, and medium format 645-series digital cameras. Also, with the use of a built-in diffusion panel the coverage can be extended to 20mm. Another benefit of this flash is tilt from -10 to 90° and rotation 135° to the left and 180° to the right for complete bounce functionality.
In Stock
$496.95
$83/mo. suggested payments for 6 Mos.
with the credit card.§ 
Protect Your Gear
Add a protection plan from $69.99
Ask Our Experts
800.952.1815

Pentax AF540FGZ II Overview

Complete your durable, rugged All Weather camera setup with the P-TTL capable AF540FGZ II Flash from Pentax which features 28 seals, including the hot shoe, that enable a reliable weather-resistant digital imaging system. This unit has a guide number of 177' at ISO 100 and 85mm along with a 35mm equivalent zoom range of 24-85mm, though the auto zoom function is compatible with smaller format Q-series mirrorless cameras, APS-C DSLRs, and medium format 645-series digital cameras. Also, with the use of a built-in diffusion panel the coverage can be extended to 20mm. Another benefit of this flash is tilt from -10 to 90° and rotation 135° to the left and 180° to the right for complete bounce functionality.

The AF540FGZ II has wireless master and slave TTL capabilities with access to 4 channels. It utilizes an optical pulse to transmit information and trigger flash units up to 13.1' away. Also, this unit can be set as a master, control, or slave unit and has access to a contrast control sync setting that enables the adjustment of the output of multiple flashes from a single unit.

An added feature for this flash is a constant LED light with 5 output settings for use during video, as an AF assist light, or as simply another light for your subject. Other settings include a multi-flash mode for stroboscopic photography as well as slow, high-speed, first and second curtain sync. Additionally, the AF540FGZ II runs on 4 AA batteries with a recycle time of 2.6-26.2 seconds and it comes with a case and stand.

Creative control modes include first-curtain sync, second-curtain sync, high-speed sync, and contrast control
Rotates from 180° right to 135° left with a lock at 0° and click stops
Right: 180°, 150°, 120°, 90°, 60°, and 30°
Left: 135°, 90°, 60°, and 30°
Tilts from +90° to -10° with stops at +90°, +75°, +60°, 45°, 30°, 0°, and -10°
Recycle time: NiMH/3 sec - Alkaline & Lithium/5 sec
Flash head automatically controls zoom from 24mm-85mm (full-frame) with compatible cameras and autofocus lenses
Wide-angle panel pulls out of flash head to expand coverage to a 20mm angle of view in full-frame format
Multi-flash mode for up to 100 flashes
Effective range of 2.6-26.2'
AF-assist beam for focusing under low light or low-contrast conditions
Daylight balanced flash for use outside without the need for gels or filters
Auto power off after 3 minutes of non-operation or after 1 hour while in wireless mode
LCD panel is backlit for use in poor lighting conditions
Runs on 4 alkaline, lithium, or Ni-MH AA batteries
UPC: 027075233010

Pentax AF540FGZ II Specs

Flash Head
Guide Number177.17' / 54 m at ISO 100
CoverageFull-Frame
24 to 85 mm
20 mm (with Wide-Angle Adapter)
Angle of Coverage31 to 78° Horizontal
23 to 60° Vertical
98° Horizontal (with Wide-Angle Adapter)
85° Vertical (with Wide-Angle Adapter)
Auto Zoom HeadYes
Bounce Head-10 to +90°
Swivel Head315°
Flash Duration1/1200 to 1/20000 Second
Recycle TimeApprox. 3 to 5 Seconds
Secondary IlluminationVideo Light
Exposure Control
Exposure ControlPentax P-TTL
Flash ModesHi-Speed Sync, Second-Curtain Sync, Slow Sync
Power Range1/1 to 1/256
Flash Compensation-4 to +2 EV (1/3, 1/2 EV Steps)
Wireless
Wireless OperationOptical Pulse (TTL/Manual)
Up to 13.12' / 4 m
Wireless Channels4
Power
Internal Power4 x AA (Alkaline, Lithium, NiMH)
External Power Pack CompatibleNo
General
MountShoe
Dimensions (W x H x D)3 x 4.4 x 4.3" / 76.2 x 111.8 x 109.2 mm
Weight12.35 oz / 350.12 g
Packaging Info
Package Weight1.26 lb
Box Dimensions (LxWxH)8 x 4.2 x 3.45"

Pentax AF540FGZ II Reviews

Yeppers

By Tim
Rated 5 out of 5
Date: 2022-09-12

Bought for exterior fill. Just right!

Did the job!

By Stephen
Rated 5 out of 5
Date: 2017-08-05

Much improved from older Pentax flash. Battery door prpoblems made me crazy with my last one. This flash is rugged, by comparison and gave excellent results. Shot a wedding reception for a family member and photos were outstanding and well lit. Unfortunately it has no bounce diffuser built in, though. I created one with a piece of photo paper and it worked nicely.

Wonderful Flash

By Miguel
Rated 4 out of 5
Date: 2017-07-02

I bought this flash to replace my Pentax AF360, and I have very pleased with its performance. It provides better coverage, but the best feature is the ability to rotate the flash for bounce when taking vertical shots. The controls are easy to work with and the weather sealing is a nice bonus. It is a great addition to my K-3 kit.

The flash is good for the price

By Mel
Rated 4 out of 5
Date: 2017-06-08

I received it this morning and tested it with my Pentax K-1. It is a good flash given the compactness. Overall its a well designed flash. Pentax should redesign the pouch to accomodate the base mount. The chances of losing the base mount is high.

yes

By Stanislaw
Rated 5 out of 5
Date: 2017-05-05

very good

Very happy

By Raman
Rated 5 out of 5
Date: 2017-04-05

Great product

Easily integrates

By Tim
Rated 5 out of 5
Date: 2021-05-23

It's so easy to get perfect flash exposures using this with the Pentax DSLR

fair

By Carlos
Rated 3 out of 5
Date: 2018-08-03

well I have used it for a bit, I tried to take pictures of my gran daughter but it didn't keep up with it, I have to wait for it at least 5 to 10 sec to buffer so really disappointing overall pictures looks great I meant the ones I was able to capture, but I miss a few shots; now I don't know if batteries are bad or because their brand is not you know something like Duracell ones or what, uses 4 AA Batteries... performs good just have to give it sometime. and for the money that I pay for it, hum well may not be worth it.

See any errors on this page? Let us know

YOUR RECENTLY VIEWED ITEMS

Does this work with the Pentax 645J (film)?

Does this work with the Pentax 645J (film)?
Asked by: Felix
The Pentax AF540FGZ II Flash can be used as a manual flash on the Pentax 645J.
Answered by: Yaakov
Date published: 2022-10-02

question

Can I use this for my pantex K1
Asked by: Shahnawz
This will work with a K1.
Answered by: Reuben
Date published: 2019-07-31

question

This Flash can work High Speed Sync, OK, will that work for the 645z I have on order since its rated sync speed is only 125? Im sure there will be a time when that would come in handy, cant always bring my studio or E-Quadras about and those will only sync at 125 Im sure.
Asked by: Anonymous
Yes, with that flash you can shoot HSS (high speed sync) with the Pentax 645z.
Answered by: Robert K.
Date published: 2018-08-24

Will it work on a Nikon?

Will it work on a Nikon?
Asked by: Charlie
This Pentax AF540FGZ II is only compatible with Pentax DSLR and Medium Format cameras.
Answered by: Kirk
Date published: 2022-05-25

question

I know this is Wi-Fi capable but can I get a cord to use it off camera on a flash bracket?
Asked by: Michelle H.
On page 55 of the manual it shows connecting the flash via the 5 pin Pentax P-TTL cord (F5P or F5PL) with the flash connected to the Pentax hot shoe Adapter F. The flash itself does not have any sync. connectors. You can also use the $15 Vello 3 ft. off camera P-TTL cord and hot shoe. If you don't need P-TTL there are many much less expensive solutions, using both a hot shoe and some type of cable. Easiest is PC connector/cable.
Answered by: Douglas H.
Date published: 2022-03-10

question

What are my battery pack options?
Asked by: Michael
Rechargeable battery
Answered by: Francois S.
Date published: 2018-08-24

question

I currently have a 645Z and was wondering if this flash needs to be in the line of sight of the camera/flash combination for this flash to work in a remote wireless operation?
Asked by: Anonymous
Yes the flash must be in the range of the master flash unit. Which is why many people still prefer radio triggers. The receiver for the wireless unit is on the front of the flash. So you must have the flash set so the sensor on the front receives the light. Luckily the head rotates so turn the head to your subject and the body to your light source. It is not the best system but it does work.
Answered by: Michael U.
Date published: 2018-08-24

question

I use PocketWizard Plus X units on my off-camera flashes. Will I be able to connect the Plus X to this flash?
Asked by: Dwight M.
I don't know. I'm not familiar with the PocketWizard products.
Answered by: Dominick G.
Date published: 2018-08-24
  • y_2023, m_6, d_10, h_24CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.35
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_9
  • loc_en_US, sid_1002145, prod, sort_[SortEntry(order=HAS_STAFF_ANSWERS, direction=DESCENDING)]
  • clientName_bhphotovideo
036