Help for angle of view conversion

alcelc wrote:

khunpapa wrote:

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Second, FL numberical value is the represent of thr Angle of View (AoV)number, which is very, very easy to understand too. (Trust me, i'm not the engineer!).

...First, Pana is known to have one sensor in the body but varied light receiving area and format!

Did you mean the improvement on sensor design? e.g. modification of the micro lenses allowing newer generation of sensor can have larger light receiving surface? If not, please kindly enlighten me what it actually is.

Second, the 4/3 system does not enforce the area size, just the sensor format! Thus using Pana lens on Oly body may give you a bit narrower AoV than using the same lens on Pana body.

Never aware of this? A quick research on various current models from Pany and Oly:

• EM1-II, sensor size 17.4mm x 13mm, total 22Mp and 20Mp be effective.
• GH5, Pen-F and G9, 17.3mm x 13mm, total 22Mp and 20Mp be effective.
• EM5-II, G85 and EPL-9, 17.3mm x 13mm, total 17Mp and 16Mp be effective.

Since both Oly and Pany use the same M43 lens mount standard (the size, the flange distance and contact points etc are exactly the same), and as the image is used to cover the Fourth Third format sensor of the same size 17.3/17.4 x 13, how can a lens produce different AoV on Oly and Pany body?

Is there any evidence to substantiate this?

Third, nowadays lens's error can be corrected by the body. The correction will change the AoV. Oftenly, it narrows the AoV.

True, but not error, mostly the imperfectness of the optical design...

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He's probably talking about multi-aspect ratio sensors, like in GH1, GH2, GH5S. These are not 17.3mm x 13mm sensors.

GH1 and GH2 were 18.89 x 14.48 mm. The GH5S is roughly 19.3mm x13mm (assuming similar to IMX294).