PentaxForums.com - View Single Post - Pentax P-TTL Flash Comparison

mattdm · 01-20-2009, 08:46 PM

Originally Posted by felix68

I was amazed to find out upon testing that the flash and camera do the right thing and adjust the lens aperture if your camera ISO doesn't match the flash. Not only that but the flash adjusts automatically to the correct ISO when you turn the flash on so if you have ISO 400 set, the flash comes up with ISO 400 the first time. If you adjust ISO after that, the flash compensates with aperture.

Cool — thanks for testing. Given that the Metz flash can get the ISO information, it'd be crazy if the Pentax version couldn't do something with it.

So, how exactly does it behave in Auto mode in Av or Sv?

Oh, and what does it do in Tv or P if you're using Auto ISO?

01-20-2009, 08:46 PM	#21
mattdm Pentaxian Location: Boston, MA Gallery Photos: 8 Posts: 2,010	Originally Posted by felix68 I was amazed to find out upon testing that the flash and camera do the right thing and adjust the lens aperture if your camera ISO doesn't match the flash. Not only that but the flash adjusts automatically to the correct ISO when you turn the flash on so if you have ISO 400 set, the flash comes up with ISO 400 the first time. If you adjust ISO after that, the flash compensates with aperture. Cool — thanks for testing. Given that the Metz flash can get the ISO information, it'd be crazy if the Pentax version couldn't do something with it. So, how exactly does it behave in Auto mode in Av or Sv? Oh, and what does it do in Tv or P if you're using Auto ISO? Last edited by mattdm; 01-20-2009 at 08:48 PM. Reason: one more question. :)