[PhotoDave1]

I have two shoots coming up tomorrow and I want to get some use out of the Photo Vision target I bought but I do not like to go into anything blind so I thought I would do a little experimenting with it in my garden.

Using a light meter of known accuracy I took a couple of shots at F5.6 @ 1/400 sec and got a good and balanced histogram and I like the way it looks on my monitor in Photoshop.

I then set up the target in the same location and the first image I took totally blew out the highlights. I only had two spikes on my Histogram. I gradually increased the shutter speed until I was at 1/1000 sec and then I got a good Histogram with three evenly distributed spikes on the Histogram.

As of now with this Photo Vision target I am pretty much taking everything on faith but eventually I would like to get to the point where I understand the method behind the system because then and only then will I be a better photographer.

Can anyone help me out with an explanation for this seeming discrepancy? Thanks.