Originally posted by luftfluss Makes sense. According to the specs posted over at DPR, the K-1's OVF has a magnification of .7x, while the 645Z is .77x (35mm equiv).
Will the new OVF design being debuted in the upcoming K-3 III be ported to the K-1 and 645Z successors? One would think so...
The math below seems to make sense to me... YMMV.
Ovf magnification applied to the width of each sensor to give a rough idea of perceived width makes the two seem quite similar in how the viewfinder presents the images. Even without taking ovf into account the width is only at most about a 20% delta. When you add back the ovf factor - the fact that one is viewed with a 10% higher magnification - suggests that the optical view is fairly similar in width.
Pretend we had a scene 100 units wide on the 645z sensor and 80 wide on the k1 sensor. Viewed on the 645z it would appear as 130 units wide (100/.77x), the k1 would show a scene 114 units wide (80/.7x). The difference in view dropped to about 12% of the larger view due to ovf magnification differences ((130-114)/130).