[tyflok]

我用512M CF 在 300D，當在全自動mode 時，格number show 142張。但在其他mode 時，show 157張。怎麼會這樣？
請各師兄教小弟！

[CCB]

Not sure if this is correct answer. But I noticed that if you use higher ISO, the file size cretaed will be bigger and result is less number of shots in the same CF.

Back to your case, green box (full auto) means eveything goes auto, even ISO, so if you do the test that you mention in a dark place, 300D will increase the ISO and that generate larger file even you use the same resolution. But in creative mode (P,Av,Tv,M) the ISO remain unchange (as what you set) and the file size keep the same.

I think that is the reason. If not, any one got other idea?

[tyflok]

but the meter show more when pre-set mode on (all mode except full-auto).
Don't know what happen.
Thanks for help anyway.