bought an a65 and very impressed so far until on the 6th time of use I changed lens mid way through a shoot (camera switched off) and got many dirt marks on my images.
Now the translucient mirror always stays closed so the dirt must be on the mirror as it "protects" the sensor.
After blowing the mirror to free it from dust there was an improvement in the image quality but still some marks remained.
I then followed the sensor cleaning instructions from the manual, no improvement in image quality. I also raised the mirror and gave the sensor a blow. Still no reduction in marks appearing on the image.
I have read many other posts on this forum and others, and found that these two procedures clean the sensor in 99.99% of circumstances.
Therefore I must conclude that either I am particularly unfortunate and have a very sticky sensor, or the dirt marks are still on the translucient mirror.
What is the best way to remove the dirt from the mirror if blowing does not work?
Have any other users of the SLT system come across dirt on the mirror effecting image quality?
If so is this a design issue feature of the SLT system?
Thanks in anticipation.