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DSLRUsers.com • View topic - Exposure 101

Exposure 101

For beginners, and everyone else as well.

Moderators: Greg B, Nnnnsic, Geoff, Glen, gstark, Moderators

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Exposure 101

Postby gstark on Mon Jan 03, 2005 6:34 pm

is the first of a number of tutorials that we'll be creating and making available to you.

Many thanks to Cricketfan for all of his hard work in preparing this.

Please PM me with suggestions of other tutorials that you feel may be useful (or offers to prepare some).

Enjoy.
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Postby Kristine on Mon Jan 03, 2005 6:41 pm

Hi Gary

This tutorial was a great idea and will be very useful to us members :P



Cricketfan

Thanks for taking the time to make such a valuable resource - this is much appreciated.
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Postby ru32day on Mon Jan 03, 2005 6:55 pm

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Postby Glen on Mon Jan 03, 2005 7:12 pm

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Postby phillipb on Mon Jan 03, 2005 7:25 pm

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Postby W00DY on Mon Jan 03, 2005 10:08 pm

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Postby christiand on Mon Jan 03, 2005 10:11 pm

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Postby birddog114 on Mon Jan 03, 2005 10:48 pm

We have few tutorials in Important link section, it might worth to re-post or re-direct to this section.
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Postby gstark on Tue Jan 04, 2005 1:51 am

g.
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Postby gstark on Tue Jan 04, 2005 1:54 am

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Postby Geoff on Tue Jan 04, 2005 4:48 am

Cricketfan - this is brilliant, GREAT work. I might show this to my fiancee who is always interested in learning more about the camera and how it works, I can tell her but to be able to read what you've compiled in a very simple to follow format, it's a real winner. Thanks for your worthy contribution!

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Postby bwhinnen on Tue Jan 04, 2005 3:12 pm

Brett Whinnen


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Workshops

Postby the foto fanatic on Tue Jan 04, 2005 7:09 pm

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Re: Workshops

Postby bwhinnen on Tue Jan 04, 2005 7:13 pm

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Postby dooda on Wed Jan 05, 2005 5:56 am

love's first sighs are wisdom's last

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Postby birddog114 on Wed Jan 05, 2005 7:36 am

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Postby ajax on Wed Jan 05, 2005 8:59 am

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Postby ru32day on Wed Jan 05, 2005 11:23 pm

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Postby shakey on Mon Apr 18, 2005 1:33 am

Gotto get a few posts up so I can post some photos!
AutoISO, as an additional tool in getting correct exposure, seems to be neglected by most, dismissed by others and then damned by faint praise by the rest. I think it is a valuable tool when you want to have absolute control of the speed and the aperture you want to shoot at. I'm thinking outdoors action shots. It is a tool unavailable to film photographers.

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Postby gstark on Mon Apr 18, 2005 8:06 am

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Postby the foto fanatic on Mon Apr 18, 2005 8:30 am

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Postby shakey on Tue Apr 19, 2005 1:28 am

Shakey,

>Welcome. You can post images at any time; there's no restriction on >post counts for that.

..Thanks for that. I was really thinking of the "challenges" which require a 5 post threshold

>There was a recent discussion on auto-iso - maybe 4 weeks or so back? >might be worth looking for that too.

>I personally think it's almost worthless; you have no idea of when it's >going to change, nor what it's going to change to. If I need a fast ISO, I >should be able to recognise the situation and adjust my shooting >technique as appropriate.

...For the most point I agree with you, but I disagree that it's "almost worthless". I think its useful in fading light (or rapidly changing light) when you are trying to freeze action ( eg a rodeo as dusk falls, or as clouds pass across the sun). I only use it in S or M mode, and only in certain situations. It only kicks into action when correct exposure is not achieved at the default ISO. I believe (but can stand corrected) that auto ISO will only bump the ISO up to the number which gives correct exposure. If it's a choice between an underexposed shot or a "noisy" well exposed shot I'll usually take the well exposed shot anytime, and use Noise Ninja to reduce the noise if necessary.

So taking it point by point
1. You DO know when it is going to change. It will change when your selected shutter speed, aperture and default ISO will result in an underexposed shot.
2. You DO know what the ISO will change to...it will change to lowest ISO which will lead to a correctly exposed shot

I see auto ISO as a "last chance" option to get correct expose in photographically inclement situations. Used appropriately I think it's a useful tool.

Anyway I'll get off the soapbox now and congratulate you on a wonderful site and resource for dSLR users.


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Postby gstark on Tue Apr 19, 2005 8:00 am

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Postby Big Monkey on Sat Jul 28, 2007 7:12 pm

Thanks for writing such a informative article. Having read "Photography in a Nutshell" and this one, I am starting to think I may be learning something! Really useful for beginners and definitly gives me more confidence in understanding DSLR's.

Great Work, keep it up.

Cheers
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Re: Exposure 101

Postby tanmoy1048 on Sat Dec 25, 2010 1:11 am

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Re: Exposure 101

Postby Victor03 on Fri Mar 01, 2013 12:23 pm

Gary,

I notice that the URLs for the older tutorials no longer work.
Have they been replaced by other material? I could not see any replacements in the DSLRUSER website.

Perhaps they could be refreshed?

Cheers.
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