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next PZ lens test report: Olympus M.Zuiko 7-14mm f/2.8 Pro
#15
Quote:Actually this is incorrect - it's about 50cm.

 

Object size = 900mm

Image size = 13mm

Object distance = 500mm

-> focal length 7mm for MFT

 

Reference:

http://www.giangrandi.ch/optics/focalcal...calc.shtml

 

0.5m is also the hyperfocal distance at 7mm @ f/5.6, BTW.

 

The hyperfocal distance at 7mm @ f/2.8 is 1.1m.

 

Hyperfocal distance = depth-of-field of half that distance to infinity - assuming a flat focus field that is.

 

Reference:

http://www.cambridgeincolour.com/tutoria...stance.htm

 

And the hyperfocal has very little to do with macro photography. It is a guidance for landscape photography.
You once wrote that the testing distance is 51x the focal length (that that is not the case apparently, is not on me). Besides that I forgot to take the crop factor into account, which was silly. 

 

Hyperfocal distance should be a thing of the past. Unless one dislikes getting the best results. It is a theory from when print size and resolution usually were limited.

  


Messages In This Thread
next PZ lens test report: Olympus M.Zuiko 7-14mm f/2.8 Pro - by longbowswift - 11-02-2015, 05:04 PM
next PZ lens test report: Olympus M.Zuiko 7-14mm f/2.8 Pro - by Brightcolours - 11-05-2015, 06:26 AM

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