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I'm looking online for an M42 flanged adapter for my A77 so that I can use a Zenitar M 50mm f1.9 lens, which has an aperture pin. I haven't had any luck finding such an adapter for the A Mount. Does anyone know where I can find one to buy? I already have an M42 adapter without a flange, but this Zenitar lens' aperture blades can't be adjusted on the adapter, so the lens is always wide open.

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    • Shooting a cactus flower is probably where you do want to have nice bokeh. I can't recall which camera you're shooting, or maybe you haven't said, but using live view you can see what the shot will look like before you press the button. Try setting up on a flower or something stationary where you can control the background and see the changes different settings make. 
    • That's what I got from your post here: When shooting at f/11, bokeh is indeed not something you should be concerned with, unless when shooting closeup. Nearly all lenses have a polygonal iris shape at f/11 which naturally gives a more edgy rendering of out of focus areas. @Cameratose's example is perfect for demonstrating the relevance of bokeh. To some extent you can influence the backdrop of a shot, but if it is busy foliage relatively close by, it'd better not be distracting from your subject. Some lenses are able to create a more pleasing background than others, even at the same aperture setting and focal length. For the impact of the entire image one might even argue that the smoothness of the background is as relevant as the sharpness of the subject.
    • Like Cameratose, I usually go for as much depth of field as I can, but sometimes there is no getting around out of focus areas, such as a closeup of a cactus flower.  I guess, everything else being equal, I might be concerned about a lenses bokeh, but everything else is seldom equal.  At this point in my photography I think I have bigger problems than unattractive bokeh.
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