I realize I am just slowly learning what aperture, iso speed and white balance are.. and am only practicing with my 40d but.. today is really a perfect time, the sky's light is making all of the forests a brilliant orange color and their is mist everywhere, I thought I might as well use the day to my advantage. So, I was wondering if someone could address a few things for me. My plan is to take the best nature photos I can with only my limited experience. 1) Aperture. I'm having a difficulty learning the uses of this. A website told me this: "At wide apertures, lens abberation will soften photos, and at narrow apertures light diffraction will soften photos. Try to achieve the maximum balance between the two where both are minimized. This tends to occur near F8. If you use F22 you will actually obtain more depth of field, but hurt your results due to diffraction softening details." So. Let me get this straight. The higher the aperture which means F22, the softer my photos will be? The lower the aperture my photos will be extremely detailed and sharp? 2. Shutterspeed. With my limited time, I've been practicing with shutterspeed. So I get it, the faster the shutterspeed the less blurry your photos will be and they will be darker since the camera has less time to draw light into the camera, right? So, is there some kind of shutterspeed that is recommended or will it not effect the quality of my photos, it just determines the darkness and lightness? 3. White Balance. I'm still really trying to figure out what this is. Does anyone want to start me off? 4. Iso Speed. All that I've been able to figure out is that it determines how bright your photos will be. If I have an Iso Speed that is 1500, my photos will be extremely bright. But what about image quality, does Iso Speed have something to do with this? 5. If someone could also just give me some tips on how to take great nature photos, I would HIGHLY HIGHLY appreciate it Thankyou for reading. Hopefully someone can answer my questions!