Quella comparazione penso sia veramente splendida. L'ho valutata bene a suo tempo quando ho deciso di prendere il CCD e ora ho un sensore a colori, ma so bene quali siano i pro e i contro. Nel mio caso credo sia una buona scelta, pur dovendo rinunciare a qualche caratteristica propria dei sensori monocromatici.
A parte le pure performance simili in molti casi, mi sembra interessante il commento finale sul presunto risparmio di tempo nell'uso del sensore a colori invece che quello in bianco e nero: non c'è praticamente differenza!
Cita:
Exposures- There isn't any time savings with the use of the color camera over the mono when it comes to getting similar quality S/N data so expect to spend at least the same amount of overall time as the XM for a given exposure requirement. The XM, with its higher QE displays less noise and brighter image structure when equal DDP stretches were applied to both examples. This can be improved with the XCM in most cases however as the noise reduction techniques and packages available provide very good results. But, this does add to the overall processing time. Also, depending on the object being imaged, you may need longer sub-exposures or more shorter exposures to get adequate S/N and this is the prefer method instead of over processing. If you have to set up and tear down after each session, the camera selection is something you should seriously consider if the amount of time you can dedicate is of concern. This is where the mono camera would be preferred.
Mandi.
Mauro
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