Should I get the Oly 75mm?

Started Apr 29, 2013 | Discussions thread
Anders W
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Re: The 45 1.8 focuses down to 0.5 m.
In reply to marike6, Apr 30, 2013

marike6 wrote:

Anders W wrote:

Rjansenbr2 wrote:

Probably there is someone in the same situation.

I have an OM-D and have been using the 45mm 1.8 as a portrait lens. I really like it, but now wonder if I should also get the Oly 75mm.

My concern is if it will really make a night and day difference in comparison with the 45mm, specially in terms of shallow DOF and overall quality for portraits (mainly of my newborn daughter, who is now the inevitable model of all my pics). Do you think the FOV is too awkward?

After all, the USD 900 price tag isn´t that cheap for family photos...

Anyone has experience with both lenses?

But whenever you need/want to shoot at such a distance that the 45 gives insufficient magnification, the 75 fits the bill, e.g., stage performances of any kind or stealthy street shooting. When you really want/need to maximize background blur, it is also superior to the 45. While DoF is roughly the same at the same magnification, the longer FoV means you magnify the background more, which in turn makes it appear more blurred.

The Olympus 45 1.8 focuses down to 1.64' (0.5 m), and the Olympus 75 1.8 focuses down to 33.07" (84.00 cm).  So the 45 1.8 will give you more shallow DOF at each lenses close focus distance, no?

Actually, the DoF at the closest focus distance is about the same (both lenses manage a magnification of about 1:10). But that's beside the point here, in part because we often wouldn't want to shoot them at max magnification and in part because DoF wasn't what I was talking about.

The point is that the 75 gives more background blur at the same DoF due to the fact that it magnifies the background more at the same subject magnification. You find an illustration and further information here (under the heading "background blur"):

http://toothwalker.org/optics/dof.html

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