Saturday, March 27, 2004

I’m using an ExpoDisc with my Digital Rebel to set the correct custom white balance.

Dan also pointed out to me the other day that you can use the ExpoDisc to calibrate your camera’s meter, too.  By leveraging the “Sunny f/16 rule,” you can just place the ExpoDisc on the lens, select an ISO of 100, place the camera in aperture (Tv) mode to select an aperture of f/16 and then aim at the sun.  If your exposure meter is calibrated properly, you should get a shutter speed of 1/125s.  If you don’t, then you know how much over or under you need to expose for a proper exposure.

I’m happy to report that after suspicions that my meter may not be calibrated properly, it is indeed calibrated properly.

You may be asking, “What is the sunny f/16 rule?”  It’s pretty simple, actually.  On a bright sunny day, shooting at ISO 100 with an aperture of f/16 and a shutter speed of 1/125, you will achieve a correct exposure.  I’ll expound on this in a future blog entry.

Saturday, March 27, 2004 11:06:00 AM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  | 
 Friday, March 26, 2004

Building management where I work is doing major updating to the bathrooms and hallways.  When I asked the “painters” what color they were going to paint the walls, I was told they were going to use “wall covering” instead.  Wall covering?  What happened to wall paper?  Is wall covering some how more chic than wall paper?  Couldn’t you consider paint as a form of wall covering also?

Friday, March 26, 2004 2:58:00 PM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  | 
 Thursday, March 25, 2004

 I’m currently reading Understand Exposure by Bryan Peterson.  It came to me highly recommended and, from what I can tell so far, is an excellent book on the subject.  As a result, I’ve signed up for Bryan’s Internet-led class on the same subject.  Should be interesting.

Note there’s an updated version of this book coming out in August that also deals with digital photography.

Thursday, March 25, 2004 2:11:00 PM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  | 
 Wednesday, March 24, 2004

 The more I try to learn about becoming proficient with my Canon EOS Digital Rebel, the more complicated things become.  Here’s just one example of the complexities of understanding the flash metering system in Canon’s EOS cameras.

Wednesday, March 24, 2004 3:23:00 PM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  | 
 Thursday, March 18, 2004
I had to reconfigure my home network from 192.168.2.0/24 to 192.168.0.0/24 in order to support some IPsec policy exclusion stuff.  In the process, my MN-500 decided to stop forwarding packets from the Internet to the server.  Even after a reboot, it still was not happy.  I ended up removing the port forwarding rule, re-adding it and then everything was fine.
Thursday, March 18, 2004 9:13:00 AM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  | 
 Monday, March 15, 2004

Angelique took the girls to be tested for allergies today, as Abigail seems to be having a reaction to scrambled eggs.  Turns out she has an egg allergy and, according to the doctor, it’s as serious as a peanut allergy.  We were given a prescription for epinephrine – an EpiPen Jr.  I pray we never have to use it.

Monday, March 15, 2004 8:15:00 PM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  | 
I've lost a blue tang, four false percs and a peppermint shrimp with no good explanation.  The other day I happened to glance at the base of a rock and saw some nasty looking worm-like thing protruding from a hole.  It had to be a good 4 inches long.  I didn't see a head, but it looked like a segment of a bristleworm.  I tried to pin it with my fish feeder, but it retracted back into the rock.  Haven't seen it since.  I'm wondering if this may be the culprit that's been killing off my fish ...
Monday, March 15, 2004 12:43:00 AM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  | 

The brown algae problem now seems squarely under control.  The lights are on for only 8 hours at a time and I've dropped in 6 large turbo grazers.  Combine that with the phosphate magnet I threw in the sump and the water is looking more clear than the day I set it up.  Only problem is that the snails have zero concern for the coral and tend to knock my brain coral and some other pretty thing I got from Mark to the ground on a regular basis - small price to pay right now for having the tank looking good.

Of particular note ... I measured the phosphate levels the other day and they are still really high - over 1.0.  I'm going to measure again tomorrow and see if I've crossed some threshold and they've come down, but I think I'm still struggling to get the phosphates down - even after a number of water changes.

Monday, March 15, 2004 12:41:00 AM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  | 

I'm trying to make sure that none of the links from Casa dé Hambone cause a new browser window to open up.  Personally, I hate Web sites that do that.  If I want a new browser window to open, then I'll Shift+Left Click to control it myself.

If you find a new window being opened, please let me know.

Monday, March 15, 2004 12:28:00 AM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  | 
 Sunday, March 14, 2004

I've been developing my “workflow” in Photoshop Elements, and thought I'd share in case anyone is interested.  Before I jump in, let me just say that I highly recommend Scott Kelby's The Photoshop Elements Book for Digital Photographers.  It's a fanstatic step-by-step book that cuts through all of the theory and goes right to the heart of showing you how to do what you want to do.  If you want to learn the in's and out's of Elements, this not the book for you.  But if you want to immediately be productive in Elements and learn by doing, you can't go wrong.

Now for my workflow ..

  1. Layer | New Adjustment Layer | Levels ...
    1. Adjust the left and right sliders to the left and right edges of the histogram, respectively
  2. Layer | New Adjustment Layer | Brightness/Contrast ...
    1. Brightness -3, Contrast +7
  3. Filter | Sharpen | Unsharp Mask
    1. Amount 65%, Radius 4, Threshold 3

Some may say that my Unsharp Mask is a little aggressive, but this is what I developed when shooting up-close portraits of my kids and I tend to not get the focus exactly on the eyes.

Sunday, March 14, 2004 4:52:00 PM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  | 

I've been spending a lot of time chatting with a very kind and knowledgeable indivudal, Doug Kerr, on the subject of how my Digital Rebel calculates exposure when using a flash.  One of the most interesting aspects is that when taking a picture with flash, you are actually getting an exposure that consists of both ambient light and the flash.  This is illustrated this timeline (ignore the absolute times and treat them as relative:)

 

Consider a subject that is backlit.  If you take the picture without flash, you will end up with a silhouette of your main subject.  If, on the other hand, the camera allowed you to only use flash - and not ambient light from the background - your main subject would be properly exposed, but your background would be underexposed.  By combining the two - flash and ambient light - in a single exposure, you end up with both your main subject and the background properly exposed.

From my discussion with Doug, it goes deeper than this, but this was definitely enough to help me understand how flash interacts with the camera's main metering system.

Sunday, March 14, 2004 1:05:00 PM (Central Standard Time, UTC-06:00)  #    Disclaimer  |  Comments [0]  |