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PENTAX MZ-5, SMC PENTAX FA ZOOM 28-70mm F4
1997/5/25 FUJI RVP

• Dark cloud which covers the sky. The cloud of identity is called "cumulonimbus" or "thundercloud".
• The cloud is black(dark), which means the cloud is fairly thick.
  It means which cloud grows from into the vertical direction. In other words, An updraft in cloud is very strong.
• If we have "sucked up" such a cloud in flight time, it become a very dangerous situation.
• Even though I have not flew, If such cloud come here, next expected of course is rain of thunder. Put away a Canopy, let's hurry up preparing for evacuation.

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