Personally, based on the pattern, that just doesn't look like blight at all to me, or a fungus for that matter, at least compared to what I've had on my plants in the past. Though it DOES almost look like there are a few early blight splotches on the lower right leaves of the plant, barely visible.

It could be the lighting, but the plant does look a little pale to me, especially around the lower leaves.

I'm just curious, where are you located and what has the weather been like recently? I could be completely off track, but it almost seems like "environmental" damage that I've seen in the past, potentially from cooler weather.

Why do I assume this? Well, look at those beans in the background, and the other plants. They're ALL pale, and normally beans don't get a nitrogen deficiency...

The soil for those beans also looks a bit dry. How are you watering these plants?

And lastly, what are all the white specks on some of the lower leaves? Whiteflies?

hi, I do live in a colder climate, I live in new brunswick, canada and our last frost was a week and a half ago. the white spots are so lime grains that I dusted off the leaves after the picture. the only pest around here right now are slugs. It would make sence that its environmental damage thank you

I'd agree that there might be a couple of spots of Early Blight (there are several different kinds of "blight") on that lower leaf and that leaf should be removed from the plant. But in general the plant looks anemic/pale and in need of feeding.

Dave

Something else I noticed looking back over. That seems to be a fairly small pot for a tomato plant that big....You may look at moving up to a bigger pot.