is the 40D still a good one for 400$

[RAKAMRAK]

Thanks for the tips. Is there any difference between using EV comp and simply metering slightly left or right?

I'm assuming it merely shifts what the meter displays and doesn't adjust shutter/aperture or ISO.

What do you mean by metering slightly left or right? Are you talking about manual or AV/TV mode?

Say you are in AV mode, ISO is set at 100 and aperture f/4.0 and you are using 0 EV compensation. The camera meters the scene at 1/500th of a second.

Now, if you want to overexpose the scene by +2/3 stops you dial in +2/3 EV compensation, then the camera will give you a shutter speed 2/3rd stop slower than 1/500 i.e. 1/320th sec.

If you were in TV mode (ISO=100) and shutter speed 1/500th sec then for exactly the same scene the camera will give you f/4.0 aperture. If you again dial in +2/3 EV comp, then the camera will choose f/3.2 which is 2/3 stops larger aperture than f/4.0.

However, if you are in Manual mode, then you cannot dial in EV compensation. Take the above scene again. ISO=100, you choose aperture f/4.0, shutter speed 1/500th sec. Since that was exposure level chosen at either AV or TV mode with 0 EV compensation, therefore, the meter indicator will be in blinking at the middle of the scale. You want to overexpose the scene by +2/3 stops, then you need to either go for f/3.2 (you are on manual mode) or 1/320th sec (or 1/3rd stop larger aperture and 1/3 stop slower shutter speed or any such combination)

Bottom line is in AV/TV mode you can dial in the Exposure Compensation and camera changes the shutter speed/aperture; in Manual mode to get a higher exposure you need to choose the shutter speed or aperture or both yourself.

 

[unadog]

Didn't read the whole thread. Sorry if this is a repeat.

The 40D has been selling for about $375 recently at Fred Miranda.

I just bought a T3i for video. I will be selling a very clean 40D, with about 8,000 shots on it. Probably "Excellent +" - always had LCD covers on, etc.

I expect to get about the $375 for it, or a bit less.

Not shopping it here - too busy with taxes to sell it this week. Just FYI.

Good luck! Nice camera.

Michael

 

[3kramd5]

However, if you are in Manual mode, then you cannot dial in EV compensation. Take the above scene again. ISO=100, you choose aperture f/4.0, shutter speed 1/500th sec. Since that was exposure level chosen at either AV or TV mode with 0 EV compensation, therefore, the meter indicator will be in blinking at the middle of the scale. You want to overexpose the scene by +2/3 stops, then you need to either go for f/3.2 (you are on manual mode) or 1/320th sec (or 1/3rd stop larger aperture and 1/3 stop slower shutter speed or any such combination)

Bottom line is in AV/TV mode you can dial in the Exposure Compensation and camera changes the shutter speed/aperture; in Manual mode to get a higher exposure you need to choose the shutter speed or aperture or both yourself.

Yes, I shoot M and was thinking that maybe Exposure Compensation would shift what the light meter displays.

thanks for the info

 

[RAKAMRAK]

However, if you are in Manual mode, then you cannot dial in EV compensation. Take the above scene again. ISO=100, you choose aperture f/4.0, shutter speed 1/500th sec. Since that was exposure level chosen at either AV or TV mode with 0 EV compensation, therefore, the meter indicator will be in blinking at the middle of the scale. You want to overexpose the scene by +2/3 stops, then you need to either go for f/3.2 (you are on manual mode) or 1/320th sec (or 1/3rd stop larger aperture and 1/3 stop slower shutter speed or any such combination)

Bottom line is in AV/TV mode you can dial in the Exposure Compensation and camera changes the shutter speed/aperture; in Manual mode to get a higher exposure you need to choose the shutter speed or aperture or both yourself.

Yes, I shoot M and was thinking that maybe Exposure Compensation would shift what the light meter displays.

thanks for the info

No, in the M mode there is no way to use Exposure Compensation (EC), this feature does not remain active (as far as I know) anymore in M. Using EC in AV/TV is basically letting the "Camera Computer" do "something" automatically, but in M as the name suggests everything is Manual and so this "auto" feature is deactivated.

 

[Aglet]

No, in the M mode there is no way to use Exposure Compensation (EC), this feature does not remain active (as far as I know) anymore in M. Using EC in AV/TV is basically letting the "Camera Computer" do "something" automatically, but in M as the name suggests everything is Manual and so this "auto" feature is deactivated.

Some body has the ability to hold shutter speed and aperture manually set and the exposure computer can then adjust ISO to make the shot if ISO is in an auto mode. I don't know what body that is tho, or even if it's one of Canon's but I read about it a while back and thot it'd be an useful feature in some circumstances. I don't know if or how EV comp would be done then, likely the +/- button simultaneous with a control wheel or arrow key in a way different from the usual M settings.

 

[briansquibb]

No, in the M mode there is no way to use Exposure Compensation (EC), this feature does not remain active (as far as I know) anymore in M. Using EC in AV/TV is basically letting the "Camera Computer" do "something" automatically, but in M as the name suggests everything is Manual and so this "auto" feature is deactivated.

Some body has the ability to hold shutter speed and aperture manually set and the exposure computer can then adjust ISO to make the shot if ISO is in an auto mode. I don't know what body that is tho, or even if it's one of Canon's but I read about it a while back and thot it'd be an useful feature in some circumstances. I don't know if or how EV comp would be done then, likely the +/- button simultaneous with a control wheel or arrow key in a way different from the usual M settings.

That was the series 1 feature setting AV to work like M:

- enable safety shift (iso speed) C.Fn 1 - 8
- set shutter speed range C.fn 1 - 12 ( set the minimum shutter speed )

In the field:

- set the Av value
- set the base iso value (can be L so then it acts as auto iso)
- set exp comp as needed (yes we get exp comp and auto iso this way)

I have photographed karts so I set the minimum Tv to 1/500, Av at f/4 and iso100 which was about the critical point. ISO went up and down as expected, Tv went above 500 when the cloud lifted

So there you are - how to get auto iso with iso and Av limits set.

This applies to the Series 1 only

 

[RAKAMRAK]

This applies to the Series 1 only

I have never even seen a series 1 camera, so had no idea about this feature. I was only talking about EOS 40D. But good to know. Thanks for sharing the info.