Re: Z-1P and TTL flash with pre-A lenses

[Joe Wilensky]

It's always problematic to test TTL flash with no film in the camera. 
Since the sensor is measuring light reflected off the film, it's 
measuring what would seem to be a reduced amount of light reflecting 
off the black pressure plate instead.

I don't think there's any problem using TTL flash with pre-A lenses. 
You wouldn't be able to use program TTL flash, where the camera 
selects the aperture, but the true flexibility of TTL flash is in 
aperture priority mode. The Z-1p should work with even screwmount 
lenses and TTL flash in this fashion.

There should be no difference with A series lenses and later, as 
results should be the same. I think the TTL flash sensor is 
essentially taking a centerweighted reading from the film plane, so I 
don't think the advanced metering functions even matter much if 
you're using aperture priority TTL flash.

Joe


Hi,

I have a Pentax dedicated vivitar flash with TTL capabilities. Does the Z-1P
allow TTL with K and M series lenses? I tried a quick test last night with a
K 35/3.5 and would get the green auto exposure OK light on the flash to come
on only up to F 5.6 even though I was 6 ft away from the subject and 9 ft
away from a wall. The flash and camera ISO was set to 400. There was no film
in the camera if that makes a difference. I normally like to shoot the 35 at
F 8 or 11 and zone focus. I'm going to a friends graduation party for his
son tomorrow so I don't have time to do tests. Any suggestions on the matter
would be appreciated. Current plan is to shoot with the flash on non TTL
auto.
BUTCH

Each man had only one genuine vocation - to find the way to himself.

Hermann Hess (Demian)