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Discussion in 'This or That? (MFT only)' started by Phocal, Aug 7, 2015.
As would the forthcoming m.ZD 300/4.
The lens is a 300mm lens now and the aperture is still 150/2 = 75mm wide. 300/75 = 4, so it's an f4 at 300mm. All DOF and whatever calculations apply as if it was a native 300mm f4.
only thing why you can get better DOF with TC is because you can come closer with 150 lens ( min.dist ) thats why 40-150PRO have so good DOF on some picture ( it have min dist. 70cm )