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<blockquote data-quote="Horoscope Fish" data-source="post: 368009" data-attributes="member: 13090">Well, first and foremost I encourage you to experiment and figure out what works for you. Absolutely. That being said, I'm not asking you to double or quadruple your shutter speed for no reason.&nbsp;&nbsp; &nbsp; The reason this rule of thumb exists (shutter speed = 1.5x focal length) has to do with the magnification of focal length combined with the DX sensors field of view. When shooting at, say, 300mm the image we see, obviously, is magnified... And, rather critically, so is everything else; including camera shake. Just like shooting a rifle with telescopic sight attached; sure it magnifies the target but it also magnifies every tiny shake and wiggle the shooter communicates to the rifle not matter how small. Now we need to combine this magnified camera shake (brought on by the increased focal length) along WITH the 1.5x &quot;crop factor&quot; of the DX sensor. The situation is, dare I say, magnified again and magnified equally, meaning one and-a-half times in addition. Bit of a one-two punch going on here you see.&nbsp;&nbsp; &nbsp; So... When I suggest you keep your shutter at a speed that is twice the operating focal length, it's not without some degree of logic and understanding of photographic principle backing it up. But again, please feel free to experiment and determine best what works for you.&nbsp;&nbsp; &nbsp; .....</blockquote>

[QUOTE="Horoscope Fish, post: 368009, member: 13090"] Well, first and foremost I encourage you to experiment and figure out what works for you. Absolutely. That being said, I'm not asking you to double or quadruple your shutter speed for no reason. The reason this rule of thumb exists (shutter speed = 1.5x focal length) has to do with the magnification of focal length combined with the DX sensors field of view. When shooting at, say, 300mm the image we see, obviously, is magnified... And, rather critically, so is everything else; including camera shake. Just like shooting a rifle with telescopic sight attached; sure it magnifies the target but it also magnifies every tiny shake and wiggle the shooter communicates to the rifle not matter how small. Now we need to combine this magnified camera shake (brought on by the increased focal length) along WITH the 1.5x "crop factor" of the DX sensor. The situation is, dare I say, magnified again and magnified equally, meaning one and-a-half times [I]in addition[/I]. Bit of a one-two punch going on here you see. So... When I suggest you keep your shutter at a speed that is twice the operating focal length, it's not without some degree of logic and understanding of photographic principle backing it up. But again, please feel free to experiment and determine best what works for you. [COLOR=#ffffff].....[/COLOR] [/QUOTE]

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