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Author Topic: New Sigma 18-35: What does f/2.7 DOF equivalent mean?  (Read 1265 times)

JumboShrimp

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New Sigma 18-35: What does f/2.7 DOF equivalent mean?
« on: April 19, 2013, 12:07:54 PM »
HELP!!! According to DPReview: "The lens will offer the depth-of-field equivalent of a constant F2.7 on full-frame...". Yes, I have read the other thread on this lens, but still cannot understand the logic behind this. Is this the same basic premise that DOF increases as the sensor size decreases?

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New Sigma 18-35: What does f/2.7 DOF equivalent mean?
« on: April 19, 2013, 12:07:54 PM »

neuroanatomist

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Re: New Sigma 18-35: What does f/2.7 DOF equivalent mean?
« Reply #1 on: April 19, 2013, 12:13:47 PM »
Yes. For equivalent framing, you're further away on APS-C meaning the DoF is deeper.  Basically, the 'crop factor' applies to DoF, too.
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Re: New Sigma 18-35: What does f/2.7 DOF equivalent mean?
« Reply #1 on: April 19, 2013, 12:13:47 PM »