Q2: 24mm & 51M Pixels?

[jaapv]

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40 minutes ago, 01af said:

The image circle is just 41.4 mm wide. The lens still has a diagonal angle-of-view of approx. 80° due to the barrel-shaped distortion.

Which is a pretty neat trick, combined with digital correction, to keep the size as small as possible.

[nicci78]

On 3/9/2020 at 3:04 PM, 01af said:

Your math is flawed. The lens doesn't illuminate the whole 26.3 MP (or 50.4 MP in the Q2). It doesn't even fully illuminate the 24 MP (or 46.7 MP in the Q2) of the 24 × 36 mm image area. The image circle is just 41.4 mm wide. The lens still has a diagonal angle-of-view of approx. 80° due to the barrel-shaped distortion.

How to do measure the image circle ? Did you dismounted the optic ? then project lights through it and measure the circle ? 

If not my math is better. Because I can actually calculate it. 

Edited March 12, 2020 by nicci78

[01af]

vor 19 Minuten schrieb nicci78:

How to do measure the image circle?

By looking at the uncorrected image.

.

vor 19 Minuten schrieb nicci78:

Because I can actually calculate it. 

The basic rule of calculus is: Garbage in, garbage out. Your calculation may be correct but your data is not.

[eon]

There is one question that has not yet been asked regarding this topic.

What do you see in the viewfinder?

An EVF shows what the sensor captures. That should mean a 100% coverage of what will be in the final picture. However, with software correction of this sizable amount of distortion, the final picture will loose some area.
So, how accurate is the viewfinder to compose with?

[eon]

On 3/23/2020 at 9:24 PM, eon said:

There is one question that has not yet been asked regarding this topic.

What do you see in the viewfinder?

An EVF shows what the sensor captures. That should mean a 100% coverage of what will be in the final picture. However, with software correction of this sizable amount of distortion, the final picture will loose some area.
So, how accurate is the viewfinder to compose with?

Sure there must be actual users of the Q2/Q here that can answer this question.
How accurate is the EVF for framing the full 28mm?

[nicci78]

On 3/23/2020 at 9:24 PM, eon said:

There is one question that has not yet been asked regarding this topic.

What do you see in the viewfinder?

An EVF shows what the sensor captures. That should mean a 100% coverage of what will be in the final picture. However, with software correction of this sizable amount of distortion, the final picture will loose some area.
So, how accurate is the viewfinder to compose with?

EVF is 100% accurate for 28mm. Software corrections are applied live. 

26mm image is thrown out in the garbage. So you won’t see it anyway in camera. Only available in select post processing software. 
 

 

[eon]

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That is a positive surprise.

To do distortion correction in real time 60 och 120 times per second is really impressive.

[nicci78]

Actually not at all. Live software lens correction are standard on every mirrorless cameras since the very first m4/3 from Panasonic. Because most mirrorless lenses rely on such tricks. 
 

By the way, these software corrections are hard wire into the camera ASICS (CPU). So it is hardware accelerated. So nothing special really. It is pretty standard and expected. 
It can be harder for general purpose CPU  of PC or Mac. But not for the camera 
 

[jay968]

Question:

When I owned both a Q and M10 with 28mm F2.8 asph I compared image area shooing the same scene with both at same distance and aperture. The Q showed slightly more image area. Why?

[nicci78]

Every lenses are different, even with same focal length. 
Focal length engraved into lens body is only for marketing. It is not necessarily the real one. Just look for two tiny numbers near distance scale. You have to add them to the marketed focal length, in order to get the real measured  one. 
 

For example most modern Leica M 50mm lens will have 02 or 03 engraved. Because they are not 50mm. But 52mm lens mostly. 
I guess that 52mm does not sound really marketable. 
 

Last. For a given focal length you will not necessarily get the same field of view.  Because of many factors : focus breathing, automatic software correction, lens design, etc..

Edited May 4, 2020 by nicci78