Jan 042008

I guess we can safely agree that we’ve seen better images here, but sometimes you have and sometimes you don’t. If it’s for nothing else, it at least shows what the bokeh of the Sigma 70/2.8 Macro looks like at f4.

This lens has a nine-bladed diaphragm, but as you see, the blades are not curved and what we get for spotlights are regular nine-sided polygons (What’s that in English? My dictionary stops at “octagon”), not circles. This is much better than many other lenses and in general the bokeh is pleasing, but it is a thing that one needs to know. Fetishists may dislike it.

As you already have seen here, wide open at f2.8 it is of course circular, but that’s true for many lenses. Wide open their diaphragm is completely retracted and the bokeh is only determined by the barrel.

The Song of the Day is “Love 2 The 9’s” from Prince’s 1992 “Symbol” album.

  5 Responses to “447 – Love 2 The 9’s”

  1. Andreas, I like this image very much. It’s abstract, but also “real.” And the bokeh produces a nonagon – according to my big Mirriam Webster dictionary. 🙂

    If I had a room decorated in colors, or neutrals, that this image would harmonize with, I’d hang it on my wall 🙂

    Flo (from RV)

  2. Flo,

    Thank you, it should have been clear to me that you would know 🙂

  3. nonagon…

  4. hmmm… Is a nonagon the opposite of some a gone… which I suppose mean that some are not?

  5. Nope. The opposite would be an allagon. But can it be that the nonagon is really an allahere??

    I wonder 🙂

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