Tamron 90 F2.8 vs. 60 F2: background blur wide open

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Tamron 90 F2.8 vs. 60 F2: background blur wide open

nandadevieast Offline

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#17

02-09-2012, 04:30 PM

Can someone help me with this?

85 1.4 on a crop camera should have same DOF as 135 F2 on a FF camera....right?

But when we do the math: 85 divided by 1.4 equals to 60 and 135 divided by 2 equals to 67...

I can't understand it....

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Messages In This Thread

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 01-15-2012, 04:41 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Klaus - 01-15-2012, 04:58 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Brightcolours - 01-15-2012, 05:57 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by joachim - 01-15-2012, 11:23 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 01-16-2012, 04:42 AM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Rover - 01-16-2012, 09:53 AM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Brightcolours - 01-16-2012, 12:27 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Brightcolours - 01-16-2012, 12:36 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 01-16-2012, 03:17 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Brightcolours - 01-16-2012, 03:52 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 01-16-2012, 04:15 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Brightcolours - 01-16-2012, 04:25 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Rover - 01-16-2012, 04:30 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Brightcolours - 01-16-2012, 04:40 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by mst - 01-16-2012, 06:28 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Guest - 01-16-2012, 10:44 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by popo - 02-09-2012, 05:42 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 02-10-2012, 03:38 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 02-11-2012, 05:29 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by wim - 02-12-2012, 01:10 AM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by wim - 02-12-2012, 01:19 AM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 02-13-2012, 01:39 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by wim - 02-13-2012, 04:50 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Steinar1 - 02-17-2012, 10:26 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by wim - 02-17-2012, 11:08 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Steinar1 - 02-18-2012, 11:23 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Brightcolours - 02-19-2012, 10:27 AM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Steinar1 - 02-19-2012, 12:23 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Brightcolours - 02-19-2012, 12:34 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 02-19-2012, 01:25 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 03-03-2012, 04:41 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Brightcolours - 03-03-2012, 05:14 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by popo - 03-03-2012, 05:22 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 03-03-2012, 06:00 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by Brightcolours - 03-03-2012, 06:11 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by wim - 03-03-2012, 10:25 PM

Tamron 90 F2.8 vs. 60 F2: background blur wide open - by nandadevieast - 02-09-2012, 04:30 PM

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