Panasonic 7-14 - Usage tips for UWA neophyte

Started 6 months ago | Discussions thread
richarddd
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Re: Panasonic 7-14 - Usage tips for UWA neophyte
In reply to Florida Nature Photographer, 6 months ago

Florida Nature Photographer wrote:

Anders W wrote:

For the shot I posted (7 mm on MFT), the formulas would give us 600 / (7 x 2) = 43 s or 500 / (7 x 2) = 36 s, where the latter value comes pretty close to the 30-second rule of thumb I gave Florida.

So the 12-40 at say 20mm would be 600 / 40 = 15 or 500 / 40 = 12.5.

Why do I need shorter shutter speeds for long focal lengths?

Movement over a given distance would be a larger percentage of the field of view of a longer focal length than of a shorter focal length.  A larger percentage would mean it looks more like a line than like a point.

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