Hi,
i am using a cannon rebel xti. i have the zoom lens on and was messing with the settings. i cant figure how to change from iso to auto with this lens. my problem is that when i try and take pics the lens is moving like its trying to focus but doesnt take the pic...im very annoyed!
On the back of the camera to the Right of the LCD there is a up-down-left-right-center switch. push the up one. (Labeled ISO) then use the same selector switch to select the ISO you want and then press the shutter half way down. If you are shooting in a low light situation, the auto focus sometimes will not work. Change the switch on the lens from AF to MF and focus manually.
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blurring occurs not depending on ISO, i think the lens is the problem. try to clean the lens glass carefully, is there some grease stick on the lens? if not it might be dislocated one of the lens structure. have you try another lens?
If u had took photo in very low light, pictures will appear blur. Or if you use tele zoom, u need to use tripod to stablize. In normal conditions, you can turn on image stablizer.
In low light you need a high ISO setting, probably 1600.
You also could do with a lens with a low F number to let in lots of light. You can get a fixed focal length F1.8 cheap but might find the lack of zoom a problem.
A decent zoom with a low F number is going to be expensive.
The EF-S 17-55mm F2.8 IS for instance has a list price of around £800 / $1200 !!
You can get a non-Canon one which would be more affordable and you also won't need the IS at short focal lengths (although it always helps). Have a look at Sigma and Tamron in the F2.8 to F4.0 range but check the online reviews to make sure they are of reasonable quality.
I have a Rebel XTi and take professional images. It could be that your lens isn't as sharp as it should be or your sharpness settings in the camera are set low.
Could be the metering mode you are in. Could be the subject is too far away. Could be ISO is set wrong. Could be the lens aperture can't open up enough. Could be the exposure compensation isn't set correctly. Could be FE Lock is still on and the composition has changed. Does the <flash> icon continue to blink? Then you are too far away.
I think it might be a lens issue. make sure you change the macro option. the macro must be activated if you are taking a picture of something which is close to the camera. if it's not activated, the picture will not be focused. The same will happen if the item is far and the macro is ON.
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