Yashica-C wide open

Got to use this camera at dusk with the lens wide open.

(Playing around the yard while grilling supper)

I do like how the edges and background are treated! It's an almost swirly petzval look!

TMY2, first attempt with caffenol-C (came out a little too foggy and underdeveloped)

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Yashikor lens, right? Many lenses are fun to use wide open. I wonder which aberration it is, causing the swirl?

The swirl is really nice to have when the subject is more or less centered. I got it once on my Zuiko 50mm 1.8 (planar type), at the closest focusing distance. Very nice.

JPD said:

Yashikor lens, right? Many lenses are fun to use wide open. I wonder which aberration it is, causing the swirl?

Click to expand...

According to this site: http://toothwalker.org/optics/bokeh.html It's optical vignetting.
That site is an interesting technical source for optics.

Long time since I haven't used that Zuiko wide open. Lately been wandering a lot the f4-5.6 apertures and f2.8 at times. A bit of stopping down seems to smooth the out of focus rendering of the lens. Wide open it's a bit hard. I got somekind of "stop down because it will be sharper" bug too :rolleyes:

Some of these "aberrations" are a treat to see. I don't see many with modern zooms equiped on the other medium's cameras.