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Custom White Balance

Wednesday, April 22nd, 2009

I don’t actually use this much these days, but it’s a handy option to have, especially in difficult to gauge situations.  Setting white balance is easy; it’s as easy as taking a snapshot.  Using it appropriately is tougher.

the custom options for white balance

the custom options for white balance

Setting white balance: go into the menu, like we did yesterday.  This time, go to the far-right option (looks like a couple of triangles and a dot).  Immediately, you’ll start seeing funny things going on, like in the pic to the right.  That’s the custom white balance screen evaluating the balance based on… a black piece of paper. To set this as the white balance point, do what it says: press the MENU button.

So yeah, it’s easy to set white balance.  but what should you use?  Well, something white.  Or non-tinted, at least – grey technically works pretty well, so long as it’s a dead gray.  Snow works, so long as it isn’t yellow (and for us in Anchorage, so long as it isn’t break-up).  Walls sometimes work – I’ve found decent results using grey construction blocks and the interior walls of my house (we painted it an almost flat white).  Shoot, after a long winter in Alaska, I’m so pasty I can even use the back of my hand and get decent results.

These are all techniques that work in a pinch, but it’s better to use a real white balance card or something similar to get it right.  When travelling, I usually carry a card with me.  Running around town? Not at all.  That’s why I rely on presets with the sd500.
What about my SLR?  I usually use kelvin. That’s not an option on the sd500.

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Keeping your Whites Tight

Tuesday, April 21st, 2009

White balance.  It’s more important than most people think – controlls the overall feel of the photo, most notably in regards to how warm or cold it feels.  These days (and even with this old camera), the auto white-balance settings are not that bad.  But by setting it manually, it can be much better.

White Balance Menu Options

White Balance Menu Options

So reviewing the options: most cameras come with presets for straight daylight, cloudy conditions, interior light, fluorescents, sometimes a halogen fluorescent, and (most of the time, unless you’re unlucky) ad custom setting.  Look to the image at right – those are the exact settings in order from left to right.  On this camera, to get there: presS the FUNC button, then move down to the second option (where the icon of the sun is on the left, arrow to the right of it).  From here, you move left or right to select the appropriate white balance.

So, situations: in direct sunlight, definately leave it on the icon of the sun.  This will work pretty well.  Cloudy conditions, you’re thinking: go ahead & shove it over to clouds, right?  Not so fast: that works well for landscape photos, nature photos, maybe flowers & buildings.  But most of the time we’re taking pics of people.  On an overcast day, I usually leave it on sunny when the subject is other people.  This warms up flesh tones & makes the people look a bit more… orange, actually.  But it’s that healthy orange glow that people like in their photographs.

Once you move indoors, you’d think you would want the icon that looks like a bulb, right?  Move to indoor lighting.  Again, sometimes true, but not always.  That bulb is actually balanced for tungsten lighting, or typical indoor lights.  But these days, you can get indoor lights that are daylight balanced – if you use the indoor setting for daylight balance, your photos will have a blue tint to them.  Not good.

So, the general rule that I follow: if I can detect a slight yellowness to the light, I shift into this white balance.  If not?  Leave it at cloudy.  Yes, cloudy.  Cloudy is slightly warmer than most daylight-balanced bulbs so flesh tones come out well, yet it’s close enough that everything else will look natural.

The next setting, fluorescent lighting.  If you see flourescent lights, use this.  Flourescents give a slightly off-cast to color (usually slightly green), and you don’t really want people in your pics with a slightly green tint.  Unless it’s your kids after gorging on candy.  Then it’s normal.

Halogen flourescent?  I don’t use this, actually.  Ever.  Perhaps someday I’ll rethink that.

Custom white balance is a pretty large topic.  That will be covered in tomorrow’s post.

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Caring about ISO

Monday, April 20th, 2009
ISO options on the sd500

ISO options on the sd500

I don’t really want to get into ISO.  At least, I don’t really want to get too far in to the technical details.  Effects, yes.  Science, no.  Want some details?  Check out wikipedia.  Or, as I originally learned it: read The Negative by Ansel Adams (be warned, it’s not for everyone & certainly not appropriate for you if you’re only using a point-and-shoot digital camera – but if you’re ever going to get into film, it’s gold).

OK, so how does ISO effect your end result? Noise. It adds photographic noise.  The dimpled effect in photos when you zoom in & see incomplete data.  As a general rule of thumb, the lower the ISO, the less noise.  However, the lower the noise the slower the photograph.  Remember in yesterday’s post how I mentioned that you can’t control shutter speed on this guy? Well, the lower the ISO, the slower the shutter speed, and the blurrier things get.

So the real-life rule: you want to use as low an ISO as possible for the given amount of light.  Rough examples that I use:

  • Outdoors, sunny (or even cloudy) day: ISO 50.
  • Indoors, daytime, sunny or cloudy with shades open: ISO 100.
  • Indoors, shades closed during the day, but with bleed-through: ISO 200.
  • Outdoors, dusk: ISO 200 (I’ll often start at ISO 100, though).
  • Indoors, night: ISO 200 (sometimes have to go to ISO 400).
  • Indoors or outdoors, From October through March, anytime that’s not between 10am and 3pm: 200 ISO, often dropping to 400.

Notice how I only go to ISO 400 when I’m out of options?  That’s because I don’t usually carry a tripod with me when I’m using this camera.  I almost always have the flash disabled, so I need all the speed I can get.

Buttons & switches on the sd500. Note the "SCM" and "M" buttons.

Buttons & switches on the sd500. Note the "SCM" and "M" buttons.

ISO 400 is the fastest this camera can go.  It’s not too bad, but in low light (think normal indoor light at night) it gets pretty noisy.  This varies from camera to camera, mind you: my SLR does fine up to ISO 800, then spits out pretty nasty garbage.

To get to the ISO menu?  First, set the dial to “M” (for “manual”!).  then click the “FUNC” button – look to the right for a display (click for a larger view).  Now, use the buttons around the FUNC button to move down to ISO, then left & right to set it where you want.

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Shifting out of Auto

Sunday, April 19th, 2009

When dealing with a camera with such a small sensor, I find that I can’t rely on the auto settings in any way.  They kinda work if you’re only interested in snapshots. You know the type: flash in normal conditions that blows out the subject and darkens the room, something that really doesn’t make the pics good, just good enough. Auto mode on this camera isn’t even used when my 4-year-old picks it up!

It does a somewhat decent job when taking outdoor photographs in bright sunlight, though.   Unless the light is behind the subject.  Normally.

Auto is just hard to predict.  You’re much better suited to shift either into scenic or manual mode.

Scenic Mode

Buttons & switches on the sd500. Note the "SCM" and "M" buttons.

Buttons & switches on the sd500. Note the "SCN" and "M" buttons.

Most cameras have a scenic mode.  Some have several: lower-end DSLRs tend to have “sports”, “portraits”, “beach”, etc.  settings.  The sd-like series are no different – except that it’s a single scenic mode, and you toggle a menu setting to get to your desired setting.  I may write about this someday, but that’s not the topic I’d like to cover today.

To the right: “SCN” is the “Scenic Mode” option on the sd500.  Dial “M” for “Manual.”

Manual Mode

They can call it “manual” all they want, but it really isn’t.  I consider it more of an “almost manual” mode, or an “advanced scenic”.  Why?  Well, it’s somewhat limited.  You can’t set your own F-stop, nor can you control shutter speed.  You can, however, control ISO, white balance, exposure values, and a few other (lesser-used) settings.

Again, it’s not really manual, but it’s as close as you can get without hacking the firmware.

And that will introduce you to the next series of posts: why I care about customizing the settings.  Coming up:

  • ISO – why I care & where I usually set it.
  • White Balance – what I use & when. Also, how I customize it.
  • Exposure Value compensation – where I leave it and why.
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Last words on the equipment

Tuesday, April 7th, 2009

OK, this is the last thing I’ll say about the equipment, I promise!  Just a point about how easy it has been to pack around and use. Outside of being an important tool for documenting my child as she grows (and that is the main reason for having it), it has also served me well in a variety of places:

  • Scuba diving in Hawaii;
  • Hiking/mountain climbing (sorta) in Alaska;
  • Cruising the Carribean on the east, Mexico on the west;
  • Bermuda, both in the ocean and around the islands;
  • The Cascades in Washington;
  • SoCal;
  • The beaches of Maui, Oahu, and Hawaii (big island – and it went through the sulfur springs of the volcano);
  • Blizzard ski trips in Anchorage;
  • Pouring thunderstorms in Florida (technically, the outer edges of hurricane Katrina, before it headed towards NO);

I do have an SLR, and I definitely prefer its quality.  But this is the camera that I usually have with me when I’m not planning on taking pics.

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Why this setup?

Thursday, April 2nd, 2009

First of all, this isn’t my only camera.  It’s my go-to camera, though.  Why did I buy the sd500 and waterproof case?  Well, the case really followed the camera.  The camera?  I liked the sd400 (at the time, it was one of the best compacts out there), and this was the newer one.  And it was on sale – the sd550 had just come out.

And addition reason: I was motivated.  A burglary had relieved us of all cameras (along with the video of my daughter’s 1st birthday – I still wish eternal suffering to those bastards), and with a year-old daughter, I needed something.  The case followed that summer.

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Extra equipment for the Canon sd500

Wednesday, April 1st, 2009
The waterproof case for the sd500 (click for larger view)

The waterproof case for the sd500 (click image for larger view)

About two months after I bought the sd500, I picked up the WP-DC70.  That’s the camera’s waterproof case (and well worn, as you can see).  I personally grabbed it for snorkeling on the rare vacations, but quickly found it indispensable for the beach, pool, and most anywhere with dust or other contaminants.

You do have to be careful about the glass in front of the lens.  Many of my beach shots have a bit of a soft-focus touch to them, or blurry spots.  This is either water droplets that haven’t come off  or my 4-year-old’s fingerprints.

The main thing, for me, is that it’s good to 120 ft (30 meters, really).  See, just in case I ever go SCUBA diving, I want it with me.  Proof of concept: in late February/early March I did exactly that, going down to 70 meters at the deepest.  The  two-year-old poorly maintained case still held up spectacularly.

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A note about the sd500

Wednesday, April 1st, 2009

If you noticed, it’s really badly scratched up.  This is a testament to how durable it has been for me.  Through a variety of extreme temperatures, dropped on pavement, beaten, blocking stuff, getting sat on, thrown around by a four-year-old, and gummed by a one-year-old.

By now, the lens is perma-stained with fingerprints, and any liquid (even humidity) immediately gets inside, fogging it for hours.  The batter cover barely holds, and buttons are getting loose.  The zoom dial is even wiggling up and down.

That can’t be good.

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The Go-To Camera

Tuesday, March 31st, 2009
Canon SD500

Canon SD500 - click for a closer view

One of the cameras that I have been using for the last two years, and my main “carry it around in my pocket” camera is the Canon sd500.  It’s one of the smaller cameras in the digital Elph series (I believe it’s named “IXUS 700” in Europe), and has a CHDK hack available that lets you access more than just the standard powers features of the camera.

This is important – I will be doing a lot of writing about the CHDK hack.  In fact, it’s the single reason why I recommend grabbing this type of camera for the pocket.  It’s not as good as many other cameras, but for $200 you can have a near-professional camera thanks to those hacks.

Main features (which matter to me):

  • 7 megapixel
  • 37-111 mm (equivalent) lens
  • Custom white balance
  • Macro and telephoto modes
  • Selectable ISO from 50 to 400 (with decent auto detect)
  • Good battery life
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