So, not having any real knowledge in mathematics or optics, my simple understanding of the device is the following:
- by \"bundeling\" the light beams that the FF lens projects, the actual full image is projected onto the APS-c (roughly) surface:
- By the projection the image is actually scaled down. It still contains all the information, but smaller and (like sun through a loupe) brighter. Everything is by the way smaller, including abberations (if new ones are not introduced), unsharpness in the tiniest details. The \"scaled down\" image contains the whole angle of view that the FF lens originally sees, as opposed to the 1,5/1,6x crop in a normal APS- DSLR. Instead of the cropped part of the image the whole FF image is sent to the sensor, thus scaled (down).
- It is the opposite - as many have said - of a teleconverter which magnifies everything, also the weaknesses of the lens. This makes the opposite, it makes the weaknesses smaller.
- on the other hand: As opposed to the normal case where with FF lenses on Dx sensors the outer parts of the lenses are left out, and you\'ll only use the sweet spot, here you use (almost) the whole image circle that the FF lens draws, including the weaker outer parts.
- About DOF I am not so sure, but I assume you\'ll get nearly the same DOF as in a FF camera. Which is what the samples suggest....
Did I get something wrong here?
In the end speculation about how the adapter works in practice will not tell us how it actually will perform. I personally assume much better than many think, the concept is original and I am very surprised that noone has come up with such a device since APS DSLRs have become the mainstream and sell in millons.
There are obviously some creative thinkers at Metabones and I wish them a huge success with this interesting product. I will for sure try the Nikon to Nex version out...
