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01/07/2005 07:19:03 AM · #1 |
Well.. i asked the question before but still never understood.. however, today, the light went on....
So just in case there is more like me out there, I will inform the masses, despite the fact i may shed light on my prior ignorance.
When you usually look through a DSLR, the aperature is wide open to let the most light through the viewfinder. This means that although you have your aperature set to F-22 (small opening), you are looking through the largest aperature your lens has, perhaps F-1.8 (large opening) This is to allow max. light to your eye, while setting up the shot.
SO....
if you press the aperature preview button (to close down the aperature while looking through the viewfinder) and the aperature is set to 1.8... nothing is going to change, the depth of field will look the same.. because you were looking through a 1.8 aperature allready...
HOWEVER
if you set your camera to an aperature of F-22, and press the aperature preview button, things WILL look different. The depth of field will lengthen, and the image will get darker.
hope that all made sense.
Message edited by author 2005-01-07 08:17:39.
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01/07/2005 08:03:24 AM · #2 |
glad that you figured it out.
hopefully it's an LED bulb that went on - and won't burn out on you ;} |
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01/07/2005 08:15:20 AM · #3 |
I thought it was just so I could look directly into the lens and watch it do cool stuff without taking a picture.
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01/07/2005 12:22:02 PM · #4 |
Originally posted by leaf:
So just in case there is more like me out there, I will inform the masses, despite the fact i may shed light on my prior ignorance.
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In all seriousness, this is the essence of somebody who has a love for learning...this is an example of the attitude that makes this a great site!
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01/07/2005 12:27:43 PM · #5 |
leaf, even though I did already have that figured out, I just wanted to say thank you for sharing.
After all, there was some point for ALL of us where we did NOT know about it (heck, that is quite a convoluted sentence, but I'm sure you know what I mean). |
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01/07/2005 02:02:33 PM · #6 |
| Does my 10D have an aperture preview button? Never knew. Where is it? |
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01/07/2005 02:07:30 PM · #7 |
near the lens mount on the bottom right (if you're looking at the front of the camera).
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01/07/2005 02:34:02 PM · #8 |
| Alright!! thanks a lot leaf... i never knew what that was for, thought it was just one more button! :) |
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01/07/2005 05:53:48 PM · #9 |
Originally posted by deapee:
I thought it was just so I could look directly into the lens and watch it do cool stuff without taking a picture. |
:-).
It's also so you can count the apeture blades, when you're really, really bored.
Cheers, Me.
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01/07/2005 06:02:48 PM · #10 |
Originally posted by jimmythefish:
near the lens mount on the bottom right (if you're looking at the front of the camera). |
I'll be damned. Well, shoot, it's only Jan. 7th and I've already learned something new this year!
Thanks! |
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01/07/2005 06:06:52 PM · #11 |
personally i haven't found that feature all that useful.
mainly because of how dark the view finder becomes when pressing it.
knowing the way focal length, distance, and aperture relate is more usefull. though experimenting with the preview button might help you understand how they all fit together i suppose.
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01/07/2005 06:44:06 PM · #12 |
Originally posted by soup:
personally i haven't found that feature all that useful.
mainly because of how dark the view finder becomes when pressing it.
knowing the way focal length, distance, and aperture relate is more usefull. though experimenting with the preview button might help you understand how they all fit together i suppose. |
well yeah i agree. I had it explained to me (with my old canon AE-1) and i read it in the manuel for the 10d, how the button works.. and when i didn't see any differance when i pressed i just gave up, it wasn't a big concern since you can easily guess the focus range you are working in...
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01/07/2005 06:50:33 PM · #13 |
Might help to end the confusion if we were to call that Depth of Field Preview Button on the 10D by it's correct name.
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01/07/2005 06:57:10 PM · #14 |
Damn! Another LED flashes! So that is what the DOF button on my D70 is for.
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