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M.Zuiko 40-150mm F/2,8 lens + M.Zuiko MC-14 Teleconverter for Close-up Photography

Started Apr 11, 2016 | User reviews thread
woodybrown
woodybrown Regular Member • Posts: 453
Re: M.Zuiko 40-150mm F/2,8 lens + M.Zuiko MC-14 Teleconverter for Close-up Photography
2

For a given sensor size, when using different focal lengths if the distance is adjusted to equalize the FOV (or the magnification), then the DOF should be the same (unless the distance is close to the hyoerfocal distance).

It appears that you came up with a greater DOF for the 210mm thru an error in the distance you plugged in for the 210mm to get the same  magnification as the 60mm. It should be 210 rather than 250cm.

M (FOV) = FL/Distance = 60mm/600mm = 210/2100.

At 210cm and 5.6 a 210mm FL gives the same DOF as the 60mm at 60cm which is 1.6cm according to the Cambridge in Colour online calculator that I am using.

 woodybrown's gear list:woodybrown's gear list
Olympus E-M1 Olympus M.Zuiko Digital ED 9-18mm F4.0-5.6 Olympus M.Zuiko Digital 45mm F1.8 Olympus M.Zuiko Digital ED 12mm 1:2 Olympus M.Zuiko Digital ED 60mm F2.8 Macro +5 more
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