Originally posted by eyeswideshut Nicolas, why are you cropping around on the Q image?
I know that if an APSC was used instead, there would be no more than 2.5MP or 4.8 time less pixels. But how many real MP was there in that Q image posted? Or if your prefer how capable was that 300mm to begin with? Would it provide more on Q than on APSC, because this is the claim? If I resize it by a factor of 4.8 in surface or 2.2 in height and witdth, then I have the same pixel density than the APSC camera. If the resized image look quite sharp, then maybe there more than 2.5MP worth of data, more than the 24MP APSC can record, I could try another re-sizing, a more moderate one to estimate how much I gain with the Q.
Doing that I have seen that basically for the posted picture, I see that the resized picture look reasonably sharp, not outstanding neither and lacking constrast. I know prime that do better than than on an APSC crop. For example the 50-135, the DA35 macro or the FA77. If I'am more moderate, in the cropping, it doesn't look that sharp.
The conclusion is that for the tested lens, the Q didn't provide signifcantly more detail. The lens is not sharp enough and the try to mount it on the Q, while fun doesn't provide anything more than the fun to try.
Knowing the quality of catadioptric optical design, I would not think that the 500mm you tried would fare any better so while the number your posted are impressive (2800mm equivalent), this doesn't mean you get more details. Let compute differently if you prefer. Imagine you use your APSC body with 24MP, you reframe to 2800mm equivalent FF, so 1866mm on APSC. Counting you start from 500mm, you have only 1.7MP worth of data remaining.
1.7MP is what? This is arround the resolution of a full HD picture. This is a picture full screen with potentially lot of details. Did you get something sharper than that ? Honestly?
While the Q made you try and that sure fun, the fact you didn't try with your DSLR is not your DSLR fault, it is your lack of willingness to try fun things with it, no more
Sure the Q is something small and fine and that stay a real adventage but quite many people try all sort of things with their DSLR too, they mount telescopes, they add TC, they add extension tube, they reverse their lens, they try to adapt old projector lenses... they try lenses with psychedelic bokeh, they simulate a lens baby rendering by adding some butter/oil on the front element... Evening is possible.
I will not insist more on this, my point was just that while fun the Q didn't have much in term of quality, nothing more than comparable alternatives. There only the look, the size, and the fun. That seems a lot said like this, but people will have as much fun with their Olympus Pen and still have a fantastic look something small too... And more picture quality. Some people will have similar experience with a Nex. Some will prefer an RX100, my father brought an X10 on sale for 200$ already some time ago. That still another devide that provide a bit more in term of quality. Sure you don't have ILC on this one but you get the feeling of a very good camera with fantastic controls.
I just don't see a huge market for the Q. Just my point of view.
Sorry for the incoveniance, I'll stop there.