Is it me and my poor eyesight or are the four close-up photos on page 48 the wrong way round? If the Alpha 550 suffers from mirror-slap then the two bottome pics look as though they belong to the A550 and not the A850.
Is it me and my poor eyesight or are the four close-up photos on page 48 the wrong way round? If the Alpha 550 suffers from mirror-slap then the two bottome pics look as though they belong to the A550 and not the A850.
I'd expect these photos to have been shot using electronic flash, so mirror slap shouldn't have been an issue. There does appear to be a big difference in amount of detail recorded.
I'm surprised that mirror slap has been mentioned on a modern SLR camera, seeing that Olympus claimed to have got rid of it with their OM1's air damper decades ago, but not surprised that using a tripod had little effect - why should it? The mass, and moment of inertia of a camera mounted on a typical (resonant?) tripod head is probably not that different to the bare camera, and with little damping. It's very instructive to mount a DSLR on a tripod and take two shots one after the other of the same detailed target - pixel peeping the images afterwards shows how much movement there's been between the two shots.
Malcolm Stewart
Jaguar Mk VII
Hi
I have double checked and the images are the correct way round, but your are right, the Alpha 850's are a little soft. I think the focus, which was on the main bloom is on a slightly different area and the reduced depth of field with the full-frame sensor has had an impact. This wasn't an issue with the D3s as I was able to place the focus very accurately using Live View on the LCD screen.
The images are really intended to show the level of noise and though it can be quite difficult to tell in print, the Alpha 550 image at ISO 6400 is much noisier than the Alpha 850's.
Angela
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