Out and About

[Scott328i]

Morning Chaps

First day out with my christmas present this afternoon (450d) and mostly played with my nifty fifty.

I had a lot of trouble with washed out images and problems with brightness all afternoon and wasn't very impressed.

To make matters worse I uploaded all my images and the gain made the pictures look like a camera phone.

So I then had a look and all the photo's ISO settings were on ISO 800 - Doh

Learning Curve ...

[nick_bbb]

At least you've learned that one early on. I did it on a paid shoot at ISO1600 on a 300D, it was a 300 mile trip to do the shoot too!

[stigmundfreud]

no matter what the iso speed is the camera will always expose based on that plus other readings. Upload a few and include the image exif info to see what you are explaining.

[Scott328i]

stigmundfreud said:

no matter what the iso speed is the camera will always expose based on that plus other readings. Upload a few and include the image exif info to see what you are explaining.

Can I upload from flickr?

[stigmundfreud]

yep once uploaded on flickr go to all sizes and at the bottom you will see a direct link to the jpeg

[Scott328i]

stigmundfreud said:

yep once uploaded on flickr go to all sizes and at the bottom you will see a direct link to the jpeg

2 minutes I will show you what I mean ...



Although I did get some cracking shots (IMO)

Edited by Scott328i on Friday 26th December 16:49

Edited by Scott328i on Friday 26th December 16:50

[stigmundfreud]

what is your flickr page?

[Scott328i]

stigmundfreud said:

what is your flickr page?

http://www.flickr.com/photos/scottwmccormack/

[stigmundfreud]

just added you!

ok looking at that washed out image your exif is 800iso 1/4000th sec at f1.8. The maximum shutter speed of the 450d is 1/4000th so it wasnt able to expose, the shot was too slow at the iso/f stop selected thats why that has washed out so much. I thought at first you had accidentally used the exposure over ride and set it to +2ev but no, its a combination of iso speed, f stop and the camera not being able to shoot quick enough at that combination.

When you expose if the camera is unable to set the speed correctly it will flash, likewise for aperture if you shoot in tv mode.

[Simpo Two]

There's a temptation when using a fast lens for the first time to set it to 'max', simply because you can, and not realise the camera can't cope with all that light. NEVER think the camera's going to get it right for you. I took some pretty standard indoor shots on Christmas Day and still needed +1.5EV to get the exposure right.

[DIW35]

What Stiggy said. If in one of the semi-auto modes (shutter or aperture priority) and the camera is unable to get a correct exposure due to a combination of settings, something should be flashing in your viewfinder somewhere to alert you to the problem.

[stigmundfreud]

there is a custom function too to protect against this. I'll try and find the setting on your camera but from memory its something to do with sensor protection during long exposure, I noticed that if I set this on that even in normal exposures it would adjust to the minimum working parameters for the shot I had selected (if I did something silly)

[Bee_Jay]

stigmundfreud said:

there is a custom function too to protect against this. I'll try and find the setting on your camera but from memory its something to do with sensor protection during long exposure, I noticed that if I set this on that even in normal exposures it would adjust to the minimum working parameters for the shot I had selected (if I did something silly)

It's called "Safety Shift" and works in Tv and Av if you hit the end stops of the variable. i.e. you are in Av, have set the aperture at 2.8 and then the shutter speed makes it's way up to 1/4000 then needs to go further, it will start automatically changing the aperture so you don't miss the shot - meaning you never (hopefully) end up with shots like the one above.

Saved me massively once when coming out of the church shooting a wedding with a 20D and forgetting to change it down from 1600 ISO... Hence why Rex and I had little labels with "ISO" on stuck by the display. Thankfully our bodies now display ISO in the viewfinder...