If you take the A7 with any of its native lenses, you can find the EM1 and a similar native lens that makes a smaller package, costs less and gives you close to a stop or more light.
I added up the weights and they are nearly equal. (Body and equivalent 24-70-ish lenses)
You clearly made a mistake. Here is the comparison with 24-70mm lenses:
http://camerasize.com/compact/#487.393,482.336,ha,t
But whose lens? You're not comparing native lenses.
You are still very, very confused here. The lenses 12-35 is a native Micro Four thirds lens. The E-M1 has a Micro Four Thirds mount. I think you need to research what Micro Four Thirds is.
Nope, not confused. It was just natural to go fetch the closest Olympus. Even so, with the Panasonic lens, the weight advantage is small. And for my use, I'd rather have f/4 in full frame than 2.8 in u4/3 for the shallow DOF effect.
Don't forget, I can put a Panasonic on my A7 as well.
You are still confused. You cannot mount a Micro Four Thirds lens on the A7. The image circle far too small, and worse you cannot control aperture or focusing (the lens is focus by wire and turning the ring does nothing without proper electrical contacts).
Yes, I can. It won't be full frame, but it will most certainly make an image the equal of or better than the u/43.
Actually you are confused again. No one knows where that "overall" number comes from. You need to look at the exact measurements because we know what those mean. You can look at the ISO you want to use and tell what the measured DR will be, so we know what those numbers mean.
So you agree then that DxO states a 1.5 DR advantage to the A7? Just the increase in resolution alone starts to push the OM1 out.
So again, the smaller camera/lens... will yield the same or better IQ.
Nope, not true at all. And certainly not in this case. Even DxO confirms this.
It will also focus faster and more reliably. It can even focus better in low light and on moving objects. And as you are learning, it has more native lenses and more support for native lenses.
Certainly the OM has more native lenses. And if Autofocus speed in millisecond difference is what you need, the OM seems more mature.
My whole point here is that the weight/size advantage of Olympus is largely lost now.
- When you drop down from a 2-3 lb carry of the DSLR + 24-70, the final weight of 1.99 lbs vs. 1.77 lbs is now well in the noise. Yes, there is variation depending on prime lens or long telephoto. But this is still such an amazing place for full frame to be. I would have considered the OM or the GX7 had the A7 not been there.
- When you compare the two, the body of the A7 is smaller, but the overall package is slightly bigger. The Panasonic lens is 2.9x2.7" while the Sony is 2.87 x 3.72". Are you really saying that the final length of an extra one inch or whatever is significant enough to matter? Sure, long lenses might be a consideration, but is it worth it to shave one lb and 3 inches to get the lower image quality on your long zoom?
- Also consider that the glass we're seeing from Sony so far is quite a step superior to the Olympus and Panasonic. Admittedly, Panasonic has it right most of the time. If we start to see mid level lenses without the Zeiss stamp, I'm sure the price and weight will come down accordingly.
- Olympus is beat on image quality by many cameras out there and for sure by the A7 and A7r. It's really kind of silly to argue otherwise. It's hard for folks to accept that, but it's fairly clear. And anything u/43 can do, full frame can/will do better. I don't deny that the OM is superb - for it's size. It's now a very mature system. But it's capped. I doubt we'll see much better for a long time. In time, u/43 will decline. There's too much potential in larger sensors.
- Yes, you will pay $400 more for the A7, but you're getting more.
So what I'm saying is that the argument that the Olympus "is smaller and lighter with equal image quality and therefore a worthy compromise" is almost dead. Panasonic is getting it right - make a pocketable m/43.
What you get with the OM is a very mature - possibly the final iteration in u/43.
Isn't this wonderful? The OP wanted answers.