09-02-2010, 01:10 PM
[quote name='Brightcolours' timestamp='1283352595' post='2412']
The mirror is the only one that can cause such ghost images, though. The other air-glass transitions get handled pretty well nowadays, in most lenses.
Of course, if one does not care about the low light ghost lights, no reason not to consider the A55.
But the mirror of the EOS RT and EOS-1N RS is not the same as the mirror in the Sony A33/55. So saying that it is not caused by the mirror, because the EOS RT did not show this, is at least a bit questionable.
The pellicle mirror of the EOS RT/1N RS is an ultra-thin mirror that virtually eliminates the reflections. Downside to the ultra thin design was that they were quite fragile.
My hunch is that Sony is using a thicker mirror, which does not avoid the reflections of the beam splitter as successfully. One could probably calculate the mirror thickness from the ghost light images.
[/quote]
Light reflected from the sensor will ultimately hit the "mirror" again. The mirror has an angle of 45 degrees or whatever. So what happens ?
The mirror is the only one that can cause such ghost images, though. The other air-glass transitions get handled pretty well nowadays, in most lenses.
Of course, if one does not care about the low light ghost lights, no reason not to consider the A55.
But the mirror of the EOS RT and EOS-1N RS is not the same as the mirror in the Sony A33/55. So saying that it is not caused by the mirror, because the EOS RT did not show this, is at least a bit questionable.
The pellicle mirror of the EOS RT/1N RS is an ultra-thin mirror that virtually eliminates the reflections. Downside to the ultra thin design was that they were quite fragile.
My hunch is that Sony is using a thicker mirror, which does not avoid the reflections of the beam splitter as successfully. One could probably calculate the mirror thickness from the ghost light images.
[/quote]
Light reflected from the sensor will ultimately hit the "mirror" again. The mirror has an angle of 45 degrees or whatever. So what happens ?