What is mFT FoV?

Started Jan 27, 2013 | Questions thread
Vlad S Veteran Member • Posts: 3,734
Re: practical measurement with 20mm

Anders W wrote:

Vlad S wrote:

Sure. But a I am already satisfied with 6.7% accuracy, and I would rather spend the time on figuring out the lighting for my next project, instead of figuring out how many inches I can fit in the frame to the first decimal.

Why did you do the exercise in the first place then? The error you made is sufficiently large to explain the entire discrepancy between the official specs and the value you found. And had the discrepancy been real, it would have been large enough to suggest that the official specs refer to the FoV before rather than after correction (which is not the case). So what was the point of your test as a response to gollywop?

In physical sciences a significant fraction of measurements and calculations is done approximately, rather than exactly. One continually weighs the expense of an accurate calculation vs. the practical advantage of the added accuracy. Gollywop said that the corrected image is significantly smaller than the uncorrected one. I got a quick, but approximate estimate of the AOV of the corrected image, and found it insignificant for my purposes (under 10%). At that point there was no reason for me to go on with a more accurate estimate.


 Vlad S's gear list:Vlad S's gear list
Olympus OM-D E-M5 Panasonic Lumix G Vario 14-45mm F3.5-5.6 ASPH OIS Olympus M.Zuiko Digital ED 9-18mm F4.0-5.6 Panasonic Lumix G 20mm F1.7 ASPH Panasonic Lumix G Vario 100-300mm F4-5.6 OIS +2 more
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