Can someone explain the need for the translucent mirror if you are adapting A-mnt lenses to mirrorless E-mnt cameras ie: Sony a6000, A7 series etc.?
207221
The LA-EA4 is more than just an adapter for mounting A-series lenses on a body requiring an E-series lenses. It is actually a complete focusing module and the translucent mirror directs 1/3 f-stop of light to the phase detectors for focusing. The focusing sensors in the E-series camera bodies are not used for autofocus.Brian Matsumoto
207222
The EF lenses made for the A7 and other full frames are controlled directly from the camera (focus and exposure). If you use an adapter without the mirror the autofocus becomes glacially slow. You may as well use manual focus. The mirror in the la-ea4 takes some of the light from the lens to control the focus. It's just as quick as if you were using EF lens.
207223
The translucent mirror separates small portion of the light and directs it to an AF sensor similar to those found in SLT/SLR cameras. The reason to require mirror in SLT/SLR cameras is that the control mechanism and mechanics of the lens are much simpler. Most SLRs calculate the focus error once and give single command to the lens to move to the correct position. The CPU then prepares a program for the lens AF motor to accelerate, move the focus and stop at the exact location. This program is then executed and at its end the picture is taken. The process used by mirrorless cameras with contrast AF or hybrid AF is quite different. Their drive systems can accept multiple commands and are able to move focus much faster than SLR lenses. Mirroless cameras use stepper motors typically. Thus in order to command a SLR lens the A6000, A7 need a Af sensor that can operate on the level these lenses were designed for i.e. execute very few commands per focusing cycle.
635140
These go "between" the body and the lens. They don't have the electronic contacts, so if you have no aperture ring, you wouldn't be able to control the aperture or stop-down. I think you have to stop-down a lot for those reflections in dewdrops, if that's what you mean. You're probably better off if you used the autofocus type extension tubes like the Kenko, Meike, etc. These tubes work best with the older film slr lenses with manual focus and aperture rings.
1906273
Yes. The alpha6000 does not have built-in "sensor-shifting" image stabilization. This means if you want image stabilization it must be included in the lens. I think the Sony advertises this as Optical SteadyShot or having OSS technology. As an aside, it is more difficult to implement built-in image stabilization into cameras with large sensors without greatly increasing the body size, because the distance the sensor would need to travel for the stabilization effect increases with its size. I think this is why Sony is choosing to keep stabilization in the lens.
202964
Directly over existing mirror. You open up the clamps wider than you attached mirror and is clamps over top. (suction cups also help attach mirror). Be sure the camera lens is not covered up by the existing mirror.
335471
You won't see the light on the FotoTech, it is infrared. Be sure you know where the remote sensing window is on the A6000. The Fototech must be in the field of view of the camera's sensing window in order to work.
347196
Hi, thanks question.This lens is for SLR camera. Not compatible to the mirror-less compact camera.Thanks in advance.
1018575
This is taken from Sony Website: Expand Your CreativityIn addition to E-mount lenses, you can add an optional 35mm full-frame compatible adapter (LA-EA3 or LA-EA4) to mount any A-mount lens to the a7. The LA-EA4 features a built-in AF motor, aperture-drive mechanism and Translucent Mirror Technology to enable continuous phase-detection AF. Both adapters feature a tripod hole that allows mounting of a tripod to support large A-mount lenses.
1729410
The t/3.8 has de clicked apature blades. This basically means that you can adjust the iris (f-stop) smoothly. It's best used for video purposes so that you can darken or lighten the video smoothly. With regular lenses they will click between f-stops making the video get darker and lighter very choppy. Other than that they're pretty much the same!
767371
I have my camera's IS on and the lenses off. I figure that it would do a better job. I have not tried it the other way. It would be an interesting test. I will let you know how it works out.
1374078
Sony Alpha SLT-A77 Translucent Mirror Digital SLR Camera Yes! This will work with the Sony Alpha SLT-A77 Translucent Mirror Digital SLR Camera -..(I found this info on the Amazon.com page for this lens...so, if Amazon's info is accurate, this lens should work just fine.
88549
Hi - Just double-checked a couple of OM lenses on my Sony a7r using this adapter. I want to make sure I'm completely understanding the question: if you're asking whether there will be any vignetting of the image, the answer is no (except to the extent that a specific lens shows some light falloff at the edges, but that's not an adapter issue, and you'd have the same phenomenon on an OM film body). If the question is whether or not the image will be cropped (using the term to refer to the so-called "crop factor" associated with smaller-than-24x36 sensors): again, the answer's no. OM lenses are full-frame lenses, the a7 is a full-frame body - so no cropping of the image. Hope that's helpful!
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I have not used this combination, though it should work. The LA-EA4 includes a translucent mirror focusing module that, from what I have read, slows focusing down to the point that it may not meet your needs (sports for instance) and has a one stop exposure penalty. The LA-EA3, on the other hand, doesn't have a translucent mirror focusing module if you don't mind focusing manually. You might consider the FE 70-200mm lens which is designed for this series of cameras and just crop your images when you need to get that extra reach. That way you can keep the fast focusing action the a6000 is known for. I have not used this combination, though it should work. The LA-EA4 includes a translucent mirror focusing module that, from what I have read, slows focusing down to the point that it may not meet your needs (sports for instance) and has a one stop exposure penalty. The LA-EA3, on the other hand, doesn't have a translucent mirror focusing module if you don't mind focusing manually. You might consider the FE 70-200mm lens which is designed for this series of cameras and just crop your images when you need to get that extra reach. That way you can keep the fast focusing action the a6000 is... » Read More I have not used this combination, though it should work. The LA-EA4 includes a translucent mirror focusing module that, from what I have read, slows focusing down to the point that it may not meet your needs (sports for instance) and has a one stop exposure penalty. The LA-EA3, on the other hand, doesn't have a translucent mirror focusing module if you don't mind focusing manually. You might consider the FE 70-200mm lens which is designed for this series of cameras and just crop your images when you need to get that extra reach. That way you can keep the fast focusing action the a6000 is known for. « Show Less
2043599
I do not notice any visual distortion, although if objects have different focal lengths, there will be a natural distortion. The concavity of the mirror does an excellent job of compensating. Re: Large-since that is a subjective, I really cannot comment. I can only state that I can see my entire well lighted face and more flaws than I care to comment on :)
1728847
There will be some distortion, similar to any lens up through probably 25mm. It is very subtle if noticeable at all unless you are right up on the structure. Easily correctable in LR5. Nothing like UWA or FE for distortion.
1293942
It is really hard to tell whether it is the adapter or the lens itself. The images I have taken so far are reasonably good. I am using Vemar and Mamiya lenses from my film days. If the old manual lenses you have are of good quality you are likely to get good images. There doesn't seem to be any drop off in light transmission. This adapter has a single, clear piece of glass in it so light loss, if any, should be minimal.
79945
I'm using it with A7s, but I can't imagine anyone not loving this lens on any alpha body. You would have to spend a whole pile of money to get anything that performs better imho.
951700
You need the official Sony LA adapters. Remember, Sony makes cameras with both the new E-mount (mirrorless) as well as the old A-mount (which Minolta originally introduced in 1985, and Sony later adopted in their Alpha cameras). The adapters aren't necessarily cheap, but they will autofocus and everything, just like a native lens. Its worth it for me, as the adapter + old Minolta glass is STILL cheaper than the modern E-mount equivalents!