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Review Summary
2019-08-03T18:35:33
Very, very disappointed that I wasted money on this flash unit. I've had it less than 2 weeks. Used it twice and within 20 flashes it states low battery. I replace the batteries and it still won't turn on. I usually love my Pentax products but this is carp and I'd love to return it but the box got destroyed.
LORI W.
2018-04-11T10:49:51
Excellent flash highly recommended
Vernon U.
2017-03-01T10:34:05
I HAVE PENTAX CAMERA I am happy I bought this flash it work great so far
payam j.
2017-02-15T03:00:52
My older Pentax 540 died in Honduras. I bought this when I returned. This is a much-improved product. First it is much lighter and more compact than previous models. The shoe bracket that fits onto the camera is metal and fits better. The flash works flawlessly on my Pentax K-3 and my new K-1.
Gary L.
2016-01-07T13:56:04
Definitely the best flash with TTL and HSS available for the Pentax system in my opinion. I like the original 540FGZ that came bundled with my K-3 last year a lot. It was a real reliable workhorse that I've used on several portrait shoots. The 540FGZ II is a better flash in almost every way possible except that you can't plug in external power for extended use which I have never needed to do. I will definitely take the better build quality, increased power/versatility, and weather sealing of this flash over its aging predecessor. In conclusion if you are Pentaxian looking for a great flash for that system you can't go wrong with the 540FGZ II.
Christopher R.
2016-01-04T22:46:33
I would tell anyone with a need for a Pentax flash to purchase this one. It is simple to use and gives great results. The controls are straight forward, for changing the power and compensation. You will not be disappointed..
JEROME S.
Pentax P-TTL
Pentax
TTL Flashes
Shoe Mount Flash
Flash duration (1/2 peak each) (M1/1) flash: Approx. 1/1200 sec. (P-TTL) Fastestduration time: Approx. 1/20000 sec.
Hi-Speed Sync, Second-Curtain Sync, Slow Sync
177
Rectangular
315°
-10 to +90°
AA Batteries
AA (Alkaline, Lithium, NiMH)
Approx. 3 to 5 Seconds
1/1 to 1/256
No
68 mm (W) x 111 mm (H) x 106 mm (T) (2.6" x 4.3" x 4.1")
Approx. 290 g (10.2 oz.) without batteries

A brand-by-brand look at your options when buying shoe-mounted flash for your digital camera.

Premium DSLR Lens Line gets a Digital Do-Over











Upgrading from the original 540FGZ
By Christopher R.
Definitely the best flash with TTL and HSS available for the Pentax system in my opinion. I like the original 540FGZ that came bundled with my K-3 last year a lot. It was a real reliable workhorse that I've used on several portrait shoots. The 540FGZ II is a better flash in almost every way possible except that you can't plug in external power for extended use which I have never needed to do. I will definitely take the better build quality, increased power/versatility, and weather sealing of ...
View full Review
Great improvement
By Gary L.
My older Pentax 540 died in Honduras. I bought this when I returned. This is a much-improved product. First it is much lighter and more compact than previous models. The shoe bracket that fits onto the camera is metal and fits better. The flash works flawlessly on my Pentax K-3 and my new K-1.
After extensive research and development, the Pentax AF-540FGZ II Dedicated Shoe Mount Zoom Flash emerges as a pinnacle of innovation for the discerning photographer. This high-quality, durable flash unit is engineered to seamlessly integrate with the robust PENTAX weather-sealed DSLRs and lenses, enhancing the photographic experience in even the most challenging environments.
Boasting an impressive guide number of 177 at ISO 100, the AF-540FGZ II is designed to illuminate subjects with precision and power, ensuring optimal exposure in a myriad of lighting conditions. Its advanced P-TTL auto flash system intelligently meters the scene, delivering accurate flash exposures every time. The high-speed synchronization feature allows photographers to capture fast-moving subjects with ease, freezing motion even under bright conditions where a wide aperture is used.
For those who venture into the realm of video or long exposure photography, the AF-540FGZ II is equipped with a built-in LED light, providing a reliable and constant light source that enhances the versatility of this flash unit. The LED is particularly useful for videographers or photographers working with slow shutter speeds, where continuous lighting is essential.
The flash's wireless P-TTL auto flash capability extends its functionality, allowing for creative off-camera lighting setups without the need for cumbersome cables. This feature is perfect for photographers looking to achieve professional-grade lighting effects or to evenly light a scene from multiple angles.
The AF-540FGZ II is not only advanced in its technical capabilities but also in its build quality. The PENTAX original weather sealing (AW) technology ensures that the flash unit can withstand the elements, making it an ideal companion for outdoor shoots where weather conditions can be unpredictable.
With quick recycle times of approximately five seconds, the AF-540FGZ II ensures that you are always ready for the next shot, capturing fleeting moments with reliability and speed. The flash's user-friendly interface and straightforward controls make it simple to adjust power and compensation settings, allowing photographers to adapt quickly to changing scenarios.
In summary, the Pentax AF-540FGZ II Dedicated Shoe Mount Zoom Flash stands as a testament to the brand's commitment to providing reliable, high-quality, and versatile photographic equipment. Whether you're a seasoned Pentaxian or new to the brand, this flash unit is an indispensable tool for achieving exceptional flash photography.