Shopper : Do you have to shoot wide open with this, or will it hold the aperture open (lens set to f5.6 for example) until shutter release?
Thanks!LUKE S : No and no. The adapter serves only as a physical spacer. The aperture is controlled only by the aperture ring on the lens. Set the lens to the desired aperture and leave it. The good news is the NEXes handle this nicely by brightening the display. This works fine unless the ISO is very high. An added benefit is that you see actual DOF, and this works well with peaking focus mode. Enjoy!JOHN C : You are able to shoot at any aperture.STEVEN P : The aperture on the lens will stay at whatever you set it at. If you set it at f/22, the aperture of the lens will be stopped down at f/22, before, during, and after the shot. The LCD/EVF image will be as seen through that stopped-down aperture. On the Sony NEX, though, the image will still be bright (in Aperture Priority mode, or in Manual once you've selected the correct shutter speed), and it will show you the actual depth of field (though it might be noisy if you've stopped down a lot).KENNETH T : This adapter has no relationship with, and places no restrictions on, lens aperture. It's purely a machined adapter. Your iris is yours to control freely.LYLE K : The answer is no. The aperture is MANUALLY set from the lens and is maintained to whatever you set the aperture at.
Based on your question, it seem that you are not fully aware of what this adapter does. It is merely a spacer to change the distance at which the lens sits from the sensor. It has no control of the aperture whatsoever. The aperture is MANUALLY set from the lens.
So when you manually focus (you can only manually focus with this adapter), you will want to focus with the aperture set wide open (unless you see focus shift - some wide lenses have this problem), and then adjust the aperture to your desired setting to get the best focus.
Hope this helps.
LyleGORDON F : Not sure if you are asking if you are limited to only shooting with the lens wide open, or if you want to know if the camera will open up the aperture while composing and then stop down when you press the shutter (or both), so I'll answer both questions:
You do not have to shoot wide open, you can set whatever aperture manually on the lens and that is what the camera will use both when composing and when it takes the shot.
Since there is no control coupling between the camera and the lens (the lens is fully mechanical), the camera itself can't control either the aperture or focus directly. So it doesn't behave like an electronically coupled lens which will open up to the widest aperture for focusing and then stop down to the chosen aperture when you press the shutter.
This does have its advantages, as what you see is what you get with the depth of field while you are setting up the shot, even with the magnification on.
Shopper : Why Did You Choose This?JOHN H : for Sony.MICHAEL E : I have several excellent Voigtlander M-Mount lenses and want to use them on a full-frame digital camera. This adapter fits them to the Sony A7II mirrorless camera I also purchased.BURKE S : Very well made adaptor, far better construction than the "cheapo" adaptors found on eBay, and yet less expensive than some competing brands. Solid attachment; no wobble when lens is mounted on camera via this adaptor; no looseness to the fit. However for same price, Hawk's Factory (on eBay) offers an adaptor that incorporates a helicoid tube which adjusts to effectively shorten the focusing distance, allowing close ups at a distance not otherwise typically possible with an M-mount lens.