>"Neuman - Ruether" wrote in message
>news:3dea5e8d.1288930@newsstand.cit.cornell.edu...
> On Sun, 01 Dec 2002 18:35:39 GMT, "Tony Spadaro"
> wrote:

> > I don't know what brand you are talking about but I've used 2x
> >converters
> >on several and they work without stop down metering.

>> Then you were using color negative film with the f1.4 lens
>> and 2X converter, or you were using lenses around f1.8 or
>> slower... The coupled-metering of the combo cannot be
>> correct due to the inability of the converter to pass all
>> the light of an f1.4 lens... If you compare the exposure
>> with stop-down metering with the lens at f1.4 and at f2 with
>> the 2X converter, you will find the shutter speed stays
>> nearly the same, though the lens passes nearly twice the
>> light at f1.4 as f2...
>> David Ruether

On Sun, 01 Dec 2002 21:59:07 GMT, "Tony Spadaro" wrote:

> I think you have a defective meter. I've used 2X converters with f1.4s,
>f1.8s, f2.0s, f2.8s, and variable aperture zooms and on several different
>brands of camera. The meter has remained accurate - although obviously
>reporting the wrong aperture by two stops - in all cases.

I have checked this with multiple cameras - and Nikon
also states that using lenses faster than f2 on converters
will result in inaccurate metering (accurate if the coupling
is disabled and stop-dowm metering is done, since this
meters the light actually reaching the meter, and not a
substitute). F1.8 is close enough to "slip by", but f1.4/1.2
isn't - unless your converters have unusually large-diameter
glass...;-)