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Cheap adapter & Sony A7

kriskerry91

By kriskerry91,
in Adapters & Speedboosters

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kriskerry91 Newbie

kriskerry91

Posted
Posted

Hi guys, first post on here but after a Google search I couldnt find what I was looking for.

 

Basically what I wanted to know is what does a lens, for example the Canon EF 50mm 1.8, with no on-lens aperture ring use as the default aperture if there is no alectronic communication to the camera?

 

I have a Sony A7 and a cheap adapter that has no electronic connections. When I attach a Canon 50mm 1.8 to the camera I obviously have no AF or aperture control. Manual focusing is fine by my but I'm just wondering will the aperture default to f1.8 and have no issues with shooting?

 

From a few examples I've done it seems to be at 1.8 and the Shallow DoF is insane, is it okay to shoot like this?

 

thanks in advance!

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addicted2light Experienced

addicted2light

Posted
Posted

Hi, and welcome :)

 

What a lens will do depends by the brand and type.

 

For example, Canon EF (the autofocus ones, like yours) will default to a fully open aperture. Actually, if I remember correctly, they will stay put at the latest used aperture; so if you use the lens with a Canon body and shoot at, say, f/5.6 and then you remove the lens and you put it on the Sony with an adapter in theory it should shoot at f/5.6. Please take this with a grain of salt, because I no longer have any Canon stuff so I'm unable to check this. 

 

Nikon G ones, instead, will default to the smallest aperture. The new kind of Nikon G (I don't remember the name, GE maybe???) will instead behave like the Canon, and stay fully open.

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  • Posts

    • Cameratose
      Bokeh?

      By Cameratose · Posted

      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. 
    • Pieter
      Bokeh?

      By Pieter · Posted

      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.
    • Mr. Lips
      Bokeh?

      By Mr. Lips · Posted

      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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