ok, so iv plucked up the courage to post a few of my pics for the first time. i have a canon 350d, and am a complete beginner to photography. basically, i just quite liked these pics and would like some (gentle!) constructive feedback about what i can do to improve them. thanks.
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I think it's slightly underexposed though. Maybe a fiddle in photoshop (or other software you have) will bring some detail out 

