I would like to begin this post with some advice to all photographers who have a passion for nature (and not only).
First, don’t stay at home when the weather is bad. Any kind of weather (especially the bad one) is good for shooting. Some of the best landscape pictures I’ve been taking so far were either when raining or when heavy clouds were building on the blue sky (see http://callofnatureblog.wordpress.com/2013/05/07/watch-the-clouds-follow-the-dreams/).
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