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EXCERPT page containing first few paragraphs. 2021-06-14 21:41:50

Ricoh GR

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Leaf Shutter in Lens: Shutter Speed + Flash Sync

The ability to use flash at any shutter speeds is a compelling advantage of the leaf shutter (shutter in lens) used in the Ricoh GR and certain other compact cameras, like the Sigma DP Merrill line and others (but Sigma DPM lacks built-in flash).

With a leaf shutter, the flash can sync at any speed. However, there is one downside: the leaf shutter can only open and close so fast in order to fully expose the entire diameter of the lens diaphragm at once, and so it has some limits based on aperture. The limits are as follows:

f/2.8: 1/2000 second

f/3.5 or f/4: 1/2500 second

f/4.5 or f/5.0: 1/3200 second

f/5.6: 1/4000 second

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Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

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f/9 @ 1/1500 sec handheld, ISO 100 +1.33 push
Ricoh GR with fill flash at -1.7

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