On a Pentax camera has a flash Pentax

Hello There,
I have this flash now for nearly 6 months. I have long been thinking at the time whether I should spend so much money for a flash. This question I can now clearly answer yes.
I have the flash frequently in use, even for lightening in HSS mode, time to unleash lightning and of course to the 'normal' flashes. For me, the use and processing is a dream. The battery cover is not a weak point for me, it actually makes a very solid impression. The positions for bounce flash have a clean snap point. A big plus I find that does not have to always be first unlocked, the head is always rotating (180 °) and swivel (90 degrees). Unless you want him tend down the possible 10 degrees' then the release button must be pressed.
The flash has 3 flash mode. The main Utilized will probably be P-TTL. In forums, one often reads that this was P-TLL not very reliable. It may be that these statements are from before, I can not confirm any case. One gets a strong overexposure when shooting a highly reflective surface 'but that's with any TTL system so because it is assumed that a reflectivity of 25%. In such a case you have to manually correct or up on the flash on the camera.

In addition, the flash provides another A (auto) mode, when the flash is the performance itself determined and not determined by the camera. Unfortunately, in this case the ISO value and aperture must be preset on the flash.
A manual mode, the AF-540 course. Here, his power of 1/1 to 1/64 are regulated.
Thus, the camera can focus in low light, the flash has a rather strong AF auxiliary light. Its range is approximately 7 meters.

The flash has the following wireless modes:
In the function as the master flash unit that takes on the camera with his flashlight, the controlling function and also contributes to the exposure of the shot in.

In the function as a controller, the flash unit takes on the camera with his
Flashlight only controlling function. The flash of the controller does not contribute to the exposure of the recording.

The flash of the remote flash unit is wirelessly or controller via flash pulses from. Master flash unit fixed on the camera (P-TTL remote). If you use the flash as a slave (to unleashed can flash) the distance of 4-5 meters to the master (internal flash, AF360 / AF540 or third party) should not be exceeded 'else is triggered reliably no longer exist.

With a corresponding master this lightning also Wireless HSS is capable.

The large guide number of 54 at ISO 100 and 85mm, the flash discharges under normal conditions not fully and is correspondingly quickly ready for operation again. Continuous shooting with flash are also given. The flash discharges completely that the full power is needed, one has a charging time of about 4 seconds.
Given the performance but perfectly okay. Furthermore, it should be mentioned positively that the flash during charging and in the willingness minimal 'whimpers' (and I'm sensitive to something :-))

The flash is quite large and bulky 'that can not be silent about. However, a Metz or Sigma is as great with this guide number.

Alternatives:
Alternatives there are in principle two. Either Metz or Sigma. However, I feel better with a Pentax flash, have since they know their protocols and modify or adapt anything. Thus is for me a Pentax camera Pentax flash.

Closing remarks:
For me the Lightning is perfect. The build quality is great and the functionality is more than adequate. All functions are described in full detail in the manual. With a set Eneloops I can do about 150-200 firings', the power consumption is thus in order.
The price is justified.