bobn2

It depends on what you do. It isn't that larger formats necessarily have better quality, they have a wider shooting envelope. If you never venture outside the mFT envelope, you won't see any ...

Yes. If the entrance and exit angles don't obey that rule the lens will not produce a geometrically accurate rendering of the scene. Most of the aberrations we deal with are the result of failures ...

You didn't mention a camera. Anyhow, which Sony FF camera is CDAF only? And why is a sensor being required to 'see in the dark'? An FF sensor working at the same f-number as an mFT sensor has more ...

But they have larger apertures and collect more light. And they are better. In a different class.

On the topic of 'chart waving', when someone claims that something is 'the best', which objective evidence should one use to validate that claim or otherwise - or should we just be using ...

And on-sensor and DSLR PDAF are different cases, as explained in my post to him.

You're confusing different things here. You're essentially comparing DSLR focus modules with CDAF. CDAF doesn't have any f-number restriction, DSLR focus modules do, because they are designed to ...

Abbe sine condition and Abbe number are different things. The sine condition says that if a lens is well corrected, then the sine of the input angle must be proportional to the sine of the output ...

Lenstip's data says something different. Lenstip is not applying consistent standards. If you want people's opinions on a lens, why go to a quantitive test site?

That's not correct, the sensor is firmly located in the z-axis (the optical axis) - it is only free to move in the x and y axes. It only requires to move in the x and y directions and rotationally ...

I don't think you're right, for any kind of AF. Please  explain why you believe this to be the case. You can't tell much from claimed figures. It's marketing spin. I don't believe that is the case, ...

I haven' got a G9 so I don't know for sure, but I doubt it.

Both things are the case, but the problem the Olympus has is still that it doesn't get close. If you look at the red line on the Sony, which is the one that the orange line of the Olympus has to ...

Having feathers in your butter doesn't sound like much fun to me. Where's the Sony for comparison? Looks like the sound of one hand clapping.

That's a problem with almost all the lens tests. Still, it's a problem that people like to have either way, depending on whether it will suit their argument or not. When someoen producs a high MP ...

Yes, that's the compromise. sensor size doesn't change the compromise,  it just determines how many compromises you have available. I'm often surprised at how much excess DOF some people use.

Ever heard of 'levelling down'. Fact remains, the Sony is sharper at the edges than the Olympus, then  it gets much sharper, whilst the Olympus doesn't.

Nose

"To get the DOF I want" seems to be something of a minority approach here. I get the impression that some just centre the meter and whatever the DOf the get is it, whilst others just set f/16 (on ...

They are opinions, not facts. There's no point having quantitative, objective measures if you're thing going to say that they are trumped by opinions when it suits you. The fact is that according ...