Foto Fridays: Rule of Thirds And ISO
Date: Friday September 14, 2007Posted in: Family, Foto Friday, Photography
So!
It sounds like you all enjoyed the first Foto Friday. I did too! Though I have to say it takes a bit of time to put these posts together. As long as you keep giving me good feedback (And questions! So I can keep learning!) then we will just keep plugging along.
Let’s jump in, shall we?
Composition: The Rule of Thirds
Here’s the technical deal when it comes to the Rule of Thirds.
Picture that there is a tic-tac-toe grid when you look through the viewfinder. Do not picture a tic tac. Tic tacs have nothing to do with photography. Unless maybe you like to chew on them so that you don’t bombard your subjects with stinky breath.
Anyways.
The Rule of Thirds basically states that you should place the subject of your photo along one of the lines in your “grid” or at one of the points where the lines “intersect” (This grid is imaginary; you won’t see it in your viewfinder). Basically? Just place your subject in one of the “thirds” of that imaginary grid (top third, bottom third, left third, right third).
Stated even simpler? Place the subject of your photo off-centre. Do not put the subject of your photo in dead centre. It’s not bad if you do, but the photo has better depth if your photo subject is in one of the thirds of your frame.
I now take photos using the Rule of Thirds without even thinking about it. When I was thinking about this post during the week I had to make a concentrated effort to take a centered photo so y’all could have a visual for all of that above mumbo jumbo.
Here’s a photo of Nathan playing in the sand.
Not a bad photo, really, but wait until you see the difference when I place him off to the left. Like so.

See? Doesn’t the photo just look better?
No? OK. What do I know? I’m just an accountant. Maybe I should go crunch some numbers or something.
Another example of a photo taken using the Rule of Thirds is this one from a few weeks ago. It’s one of my current favourites of Miss Emily.
Can you believe that I did not do any editing on this photo? Her eyes really are THAT BLUE. I kid you not.
Sigh.
Onwards! Now to play with the settings on your camera!
ISO - What could those initials possibly stand for?
ISO stands for International Organization for Standardization (Um? Then shouldn’t it be IOS? I’m just sayin’...)
That still doesn’t tell us what ISO means to you and your photo taking. The ISO number on your camera basically sets the image sensor’s sensitivity to light. The lower the ISO, the less sensitive your camera is to light. The higher the ISO? The greater the sensitivity to light and the less light that is needed to make a picture.
Here is it in simple form. For dummies like ME.
A low ISO settings provide higher-quality images. However, because the image sensor is less sensitive to light, your camera shutter needs to stay open longer to let enough light in to make a photo. On a bright sunny day, it won’t be a problem as that plethora of light will make for a snappy (and snazzy) photo. Indoors, however, is a different story.
Let’s do a photo tutorial! Then maybe I’ll actually make sense! Here’s hoping.
We’re going to stay at the same dial setting as last week. Your camera should be set to Av (Aperture Priority) mode. I usually leave my f-stop at one of the lowest settings. That way, my kids are in focus and the background is blurry.
On my Canon, I then hit the “ISO” button on the back of my camera. The options for ISO on my camera are 100, 200, 400, 800 and 1600. I set the ISO to 100 and took a photo of these sunflowers (from our garden!) that were on my table.
There was a two-point-five second time span where the shutter stayed open. This was the result.
I could have used my tripod, but that would defeat the purpose of this tutorial. I had propped my arms on the table and did my best to stay still. Apparently I have a bit of a shake to my hands, which has ABSOLUTELY NOTHING TO DO WITH MY DIET COKE CONSUMPTION.
My right eye has been twitching lately, which also has absolutely nothing to do with the mass quantities of caffeine coursing through my veins.
Back on track!
I then changed the ISO to 400. There was a point-eight of a second time span where the shutter stayed open. Here is the result.
See? Not so shaky, and in better focus. Also? Kind of cool, in my humble opinion.
Then I switched the ISO to 1600. High ISO = Really sensitive to light = you can take photos in low light (With no flash!) that might actually BE IN FOCUS!
Like this one. (There was a one-sixth of a second time span where the shutter stayed open. Super fast! Less time for shaking hands to blur the photo!)
Sunflowers are so pretty.
To give you a frame of reference: I took these photos right after the sun had set, so there was still natural light outside but it wasn’t really bright sunlight.
The downside to using the high ISO numbers is that you can get “digital noise”, which means your photos may not be as crisp as you would like them to be. This happens more when it is a lot darker and your lighting possibly consists of household lights after the sun has set.
For most everyday shooting, you’ll want your ISO to be at 400. Like above, you may want to bump up the ISO when shooting indoors.
The great thing about digital cameras is that you can play with this stuff, and it doesn’t costs a thing!
Unless you are like me and develop six months of photos at once. OUCH.
OK! Feedback time! Did any of this help you? Is the excitement about using the manual functions growing…or are you about ready to go back to the automatic settings? (Don’t do it!)
Foto Fridays is all about the Feedback. Well, maybe not all about it, but it sure makes my day. Plus, your feedback will help me decide whether to start pondering next week’s post…or whether I should do something about my toilets.
18 Comments
HEY!!THIS ROCKS! Thanks for posting this, even though I’m a Nikon user, I actually understood this and learned something;)You did do a great job explaining things;) Keep these posts coming, you can never learn enough when it comes to these kind of professional cameras. And why not better your skills and photos!? Good work!
Comment by Randi on September 14th, 2007 @ 6:03 amThis completely helped me. I have a question though, actually in reference to last week’s post (sorry!). I love the blurry-background effect. But when I attempted to do so (set the dial to AV; then to 7.1) the whole picture is so blurry. Is it because I’m not taking it in good light? Or do I need to use a tripod?
Comment by Jennie on September 14th, 2007 @ 7:14 amThese are great. I’m totally going to buy myself a DSLR SOON! Then I can actually play along!
Comment by Jill - GlossyVeneer on September 14th, 2007 @ 8:00 amGreat tutorial! I found the AV thingy last week so now I’m off to look into this ISO thingy (which so should be IOS - maybe it’s an accounting thing that the accronym actually match
Thanks Angella - you rock Foto Gurl!
Comment by Kami on September 14th, 2007 @ 8:16 amThis was super helpful. I just got my Nikon yesterday and was playing around with the ISO settings and now it all makes a lot more sense. Now I’m going to go back to the AV thing from last week and learn how to do that. Thank you! This was great.
Comment by Elizabeth on September 14th, 2007 @ 9:09 amI do love Foto Fridays. Even if I only have a point-and-shoot, it inspires me to find time to experiment. And I hear ya about developing 6 months of photos all at once … I’ve put off mine for about 2 years merely because I’m dreading choosing and paying!!
Comment by Tricia on September 14th, 2007 @ 9:33 amLOVE the sunflower picture!! The colors are gorgeous.
I need to grab my camera to play with the ISO settings ![]()
Well, the other day you mentioned the Law of Thirds and I was all, <i>”Heh heh … yea.”</i> and then thought I’d better look it up. Which I didn’t. And then, thankfully, didn’t have to b/c it is explained here.
I call that “The Eye of Me” because ME don’t like no centered photos.
I’m so intelligent.
It is best if I let you stick with Foto Fridays, eh?
haha
As long as you stick to WordPress Wednesdays. (It’s Wednesday…the conditions are perfect…there’s nothing on TV…conditions are perfect).
i don’t have great natural light in my house (hey, works on the heating and a/c bills,) but isn’t that great for photos. If I set the ISO low, I may get some good light, BUT my subject, Rt, is a moving object, so I get blurry toddler.
What to do? Go outside FOREVER?
Yes.
Cool! That really works! (Sorry, its a little rude to sound surprised, isn’t it?!)
Not rude at all! I’m surprised by my camera every time I use it
I totally love the look of the rule of thirds rather than just putting my subject in the middle. And great info on the ISO…I still haven’t had too much time to play around from last Foto Friday but I’ll get there and add it to your photo saviness from this week! ![]()
Maybe the reason I have so much trouble with focus is I tend to shoot my outside photos at 200. I have tried the 800 and 1600 in low light inside and have to say they are quite grainy looking. Good info.
Comment by Heidi on September 14th, 2007 @ 6:59 pmI enjoy these Foto Fridays, I’m learning lots!
Comment by Michele on September 15th, 2007 @ 12:03 amI’m loving your tutorials. One day, when I get my SLR, I will come back and re-read these and be able to actually APPLY THEM!! In the meantime, I’ll have to make do with my CoolPix 4300!
Comment by Hannah on September 16th, 2007 @ 3:07 pmMmm, tic-tacs…
The info on ISO was really helpful! Maybe I can de-chicken and take my settings off Auto and play around a bit. Great tip!
Comment by LionAndMagicBoy on September 18th, 2007 @ 7:52 pm[...] be horrible for photos, but it does provide enough light so that you don’t need to bump your ISO so high that you get digital noise (grainy photos). I like to drag my kids kicking and screaming [...]
Comment by Dutch Blitz » Summer Photo Tips on July 3rd, 2008 @ 9:56 pm












I think all of this information is really helpful! You do a great job of explaining things so they’re easy to understand.
Thanks, Angella!
Comment by bethany actually on September 14th, 2007 @ 5:14 am