Originally posted by xmeda Build-in flash is important part of camera. Omitting it does NOT bring any advantage, just removes functionality.
Removing the built in flash to me it means a better water sealed camera and one piece less to break.
Originally posted by xmeda It is the only light source you have in camera for situation, where nothing else is available. And even though I have 4 external flash units including AF540FGZ, there is no chance I will carry external flash everywhere. Then in pitch dark you have unusable camera and you only can grab your phone... which is horrible workaround method.
With K5 I can take only body+18-135WR and I have small ligt kit, that I can use to take pic even in tunnel if I have to. With K3II/K1 I'm fu**ed. Many times I left home just with the body and 1-2 lenses and then the buil-in flash was only thing that saved me later for some interior shots. There is no camera, that can take usable pic in poorly lit room just by pumping up the sensitivity. You'll quickly run out of ISO range and photos with 1/20s F3.5 and ISO51200 are simply not usable even with mighty K1 sensor. While with K5/K3 you just set 1/60s, F5.6, ISO400 and you can take clean short range pics with no problem.
There is no camera that with the built in flash can take good images in pitch dark situations, especially if you have to drop the ISO from 6400 (I didn't wanted to mention your settings in which you mentioned ISO 51200) to ISO 400. So lets give an usable example, starting with the following: You shoot a model/ a friend/a girlfriend in the center of a town, at night. You see a nice building that you want to include in the frame when you take a portrait of the model. You have to choose between ISO 6400 or ISO 12800, 1/60s, f3.5 and no flash or ISO 400, 1/60s, f5.6 with built in flash. I can assure you that the best way to make the building (or a tunnel since you gave this example) dissapear is to use your settings.
I assume you already know that:
- the aperture controls the flash power (so if you use f5.6 instead of f3.5 you will loose even more power from that tiny flash)
- the shutter speed controls ambient light (if you have a pitch dark image at 1/20s, at 1/60s will be even darker the ambient light)
- ISO controls global light (that means that given the above settings for the shutter speed and aperture, if you will have ambient light at ISO6400 or ISO 12800, then at ISO 400 you will loose the ambient light even if you use a more powerfull flash. Using a tiny built in flash in these circumstances means that you will have a illuminated model with direct flat light on her face but with pitch black background and strong shaddows behind her.
Originally posted by xmeda Second important use is external flash commander. And again.. even though I have several external units, I am NOT willing to carry TWO just to be able to fire one off-camera flash. That is insane. All I need with K5 is one AF540FGH placed where I need and camera fires it with wireless. And yes, it is reliable. (If photographer knows how to work with it).
Let me take you outdoor and you will see how reliable your optical solution is. Let me put the external flash inside a softbox and you will also see how reliable is. Or let me put the flash on a stand somewhere behind me and see how reliable is.
Or, try and change the power of your external flash/flashes with the built in flash. And I can give tons of othe examples why carrying a trigger with you when you have an external flash with you is a lot better than relying on that tiny flash... Trust me, I do know how to work with a flash, with 2, with 3 or with 6 flashes.
Originally posted by xmeda Even cameras like D810, D750 etc have build-in flash. It is not meant to be used on daily basis. It is backup for situation, where no other option is available.
That's why they don't have it in the newer cameras (D850/D500).
Originally posted by xmeda Btw. my old K20D also can use build-in flash as AF light. Yes it is harsh and green diode is much more discrete. BUT in complete darkness this flash AF assist is capable to lit area unreachable by green diode or red AF assist light of external flash attached to camera.
That's why a phone is also handy or the af assist light from the trigger.
Originally posted by xmeda Guys constantly repeating how they don't use build-in flah are like: Hey, remove headlights from my car, that is just waste as I only ride in daylight! I cannot observe mountains on horizont with those small lights anywas, so throw them away and save space for some GPS!
Wrong. If you cannot operate something, it does NOT automatically means, that others do not need that functionality. And concerning K3II this was the deal-killer for me. The only way they can remove buil-in flash is to provide small portable external flash that can feed from camera. Even the reduced unit on KP is better than nothing. And all Pentax bodies since 80" till the K3II +K1 HAD build-in flah. All of them. Until some horrible marketing guy decided to save $5 by removing that functionality from camera.
There is no relation between the headlines from a car with build in flash. As far as the horrible marketing guy... I think it was/is a brilliant guy. Removing the build in flash made beginners learn about how to control the light and the shadows by moving or changing the angle of an external source of light. Popping up a tiny flash makes photographers lazy when comes to learn better ways to illuminate a subject.