How do I increase d.o.f.

[Mitica100]

I would also suggest to read about the Hyperfocal Focusing.

 

[spiralcity]

That makes sense. I'll give it a shot when I get home.

Should the ISO be adjusted along with that or will I get satisfactory results just changing the f stop?

I would reccomend getting "Understanding Exposure" by Bryan Peterson. Understand that ISO 100 to 200 is a 1 stop change meaning that changing from ISO 100 to ISO 200 is equivelent to going from 1/100 sec to 1/200 sec or going from f/8 to f/11. They're exactly the same. (Each cuts light entering the camera by half or in the case of ISO the sensitivity of the sensor.)

The difference is the effect you get from each change. F stops add or subtract DoF. Shutter speed effects motion blur and such. ISO just adds noise (in my experience).

Hope this helps.

The ISO (International Standards Orginization) is the old rating for film which digital has based ther ratings on.

The ISO is the sensitvity of the film or sensor to light.

So ISO 100 is half as sensitive to light as ISO 200.

Bumping up your sensitvity can cause added noise, but most digital sensors will perform very well at 400. I for one feel you can accomplish quite a bit at ISO 400, although my ISO usually stays at 200.