20D Questions?????????

[Eric]

Ok I asked before but I had no idea what you guys were talking about with your replies that was my fault now after reading and 1000s of pics of trial and error I'm starting to get it

so far I understand the metering the iso the wb and cwb basically I just trying to learn all the functions right now

Ok travis told me about dof in an earlier post the book is not giving me a very good explanation of what this is and what setting to use it on outher than a-dep in af can it be used in all manuel setting and what does it do guess the name says it all

guess it's not that hard to learn just putting all these options together to get a great pic I'll get some good pics and post here later so you guy can give me some pointers

[Travis]

Don't use A-dep, it will only confuse you more.

DOF is achieved by changing the aperture. Which means to have control over it, you should be in "AV" mode. The higher the f-stop number you dial in, the greater the DOF at any given magnification.

Try this: Put your camera in AV mode. Focus on something. Then raise the aperture setting, and hold down the DOF preview button. It will show you exactly the DOF you'll get. Best to try this in sunlight at first, you'll see why...

[Michael_Lambert]

Hey,

Just wanted to share what i found.. i'm in the same boat as you just picked up a rebel and have no clue

This might help with seeing what the F-Stop does.


F-5.6




f-11



F-20

[Warnberg]

Depth of Feild is really easy. To put it one way it's the range that is focus in front and behind your subject. Most lenses will tell you what will be in focus once you focus on your subject and set your f-stop.
Here is how you can get the idea. Take your standard 50mm lens (or what ever you have thats close) now put on manual focus. Pick a subject approximatly 5 feet away and focus the lens on it. Now do not touch anything, look at the top of the lense. You notice that there is a line that lines up with 5 ft (or 1.5 meters), now you notive the other marks to each side of the focus mark? They have numbers on them (4, 8, 16, 22....) those are f-stop settings, so back to our example. Your subject is in focus at 5 feet (1.5 meters) now if you where using an F-Stop of 16 you can see on your lens that everything would appear in focus from approx 4 feet to 7 feet away from you (notice the numbers?) or if you used F-Stop 22, samething everything would be in focus from about 3.75 feet to about 8.5 feet, now lets go the other way lets say you used an F-Stop of 4 you would only have the subject plus about 6 inches on either side in focus, so 4.5 feet to 5.5 feet would be in focus.
Clear as mud?

Hope this helps

Dave

[Travis]

Wow, I would just use the DOF preview button and see for myself.

[Michael_Lambert]

Travis,

The DOF Preview button, how is that supose to work? When i push it the image goes dark???

Not sure what it is supose to be doing?

[Travis]

It will get darker. Depends on the aperture. I'd imagine in a low-light situation at F/22 you'd have trouble seeing. But what you should do is hold the button down and look at the DOF you're getting. It helps to try it in sunlight to get the general idea.

T

[Michael_Lambert]

So ideally,

When you push that button, You should see through the lens what you will see on the computer?

[Eric]

every pic I take in av is white washed how do I fix it this is the best photo I could get in av mode

[Michael_Lambert]

I don't know much, But it looks Overexposed to me.. Are you shooting in RAW?

[Eric]

raw+jpeg Lfine

[Eric]

when I take raw images my computer dose not pick up the pictures on camera do I need different software

[reefrunner]

What software are you using?

There have been some reports of the camera not downloading raw images from the 20d, I never noticed cause I use a card reader to transfer images.

The image of the clam seems overexposed and out of focus, camera shake maybe?? According to the exif information on that photo, it was shot at 1/60 in shutter priority mode @ 46mm @f/5.6 ISO400. Using evaluative metering. I would consider using some exposure compensation when shooting in either of the priority modes.

[Eric]

ok got the exsposure figured out still along way to got but that was the big hold up now for some fine tuning more pics tomorrow thanks for all the help lights on my tank are off so no more pics tonight

the clam is my main focus cause I've had so much trouble tryin to get a good pic

[Travis]

EEK, reefrunner has given you some good advice. Here's some more:

You want to try to get the lens dead-on to the tank glass. I think a lot of what we're seeing is distortion due to taking the pic at an angle to the glass.

T