10-07-2012, 05:37 AM
Hi,
In macro at max. magnification (what usually means MFD) FL doesn't matter - you will get same DOF with any lens (using the same (effective) f stop and the same magnification). Thus for 60mm f2.8 at 0.19m (MFD) and magnification 1:1 DOF will be 0.26mm; for 45mm f1.8 at MFD (50 cm)- 0.6cm (check [url="http://www.cambridgeincolour.com/tutorials/macro-lenses.htm"]here[/url] and [url="http://www.cambridgeincolour.com/tutorials/dof-calculator.htm"]here[/url] <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='
' />).
A.
P.S. to find out magnifications other than MFD, check [url="http://orionmystery.blogspot.com/2010/09/macro-magnification-how-to-calculate.html"]here[/url]
A.
In macro at max. magnification (what usually means MFD) FL doesn't matter - you will get same DOF with any lens (using the same (effective) f stop and the same magnification). Thus for 60mm f2.8 at 0.19m (MFD) and magnification 1:1 DOF will be 0.26mm; for 45mm f1.8 at MFD (50 cm)- 0.6cm (check [url="http://www.cambridgeincolour.com/tutorials/macro-lenses.htm"]here[/url] and [url="http://www.cambridgeincolour.com/tutorials/dof-calculator.htm"]here[/url] <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='
' />). A.
P.S. to find out magnifications other than MFD, check [url="http://orionmystery.blogspot.com/2010/09/macro-magnification-how-to-calculate.html"]here[/url]
A.