To get real depth of field in LF studio, you need a LOT more power:
If you're a large-format film shooter (4x5 view camera) and you tend to use ISO 100 film at a typical ƒ-stop of ƒ/32, you need about 32 times the amount of light as if you're shooting at ƒ/5.6. That ƒ/5.6 might give sufficient depth of field for a digital shooter using a Canon EOS-1Ds Mark II with a full-frame image sensor. In this example, the Canon shooter might choose 1,000 watt-seconds for the shot; the 4x5 shooter would need closer to 64,000.
Wow! This can't be right!
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