Sony's SLT is a new technology from Sony. It might not be perfect yet. Below are pros and cons of SLT.
24MP vs 18MP
10fps vs 5.3fps
15 focus points vs 9 focus points
no doubt winner ang sony sa features...not to say ang IS/VR nya is dependent sa body and dili sa lens
Advantages:
-Continuous phase-detection autofocus even during video, live view or continuous shooting mode
-Lack of camera shake due to mirror movement
-No viewfinder blackout while taking photograph
-Shorter shutter lag
-Exposure value, white balance and other settings can be easily and directly verified on the electronic viewfinder (and thus tweaked) before taking a picture.
-More compact body
Disadvantages:
-Lack of optical viewfinder
-Less light reaching sensor, due to portion of the light being reflected to phase-detection autofocus array (approximately 1/3 EV or 21% in current designs).
-Refresh rate limited by the time it takes the sensor to form an image; in low light this causes severe stuttering of the viewfinder image when panning (e.g. if it takes 1/4 sec for the sensor to gather enough light to form an image then the EVF updates at 4FPS).
-No real-time viewfinder update at high shooting rates, the viewfinder shows the last picture taken instead of where the camera is actually pointed; mostly a concern with fast-moving subjects(Note: DSLR does not update the image at all, as mirror is up when shooting).
-The EVF has far less dynamic range than the sensor, so the EVF does not properly show what will be captured.
-The bright light of the EVF in current implementations can cause eyestrain when used over long periods and can affect dark-adapted vision, causing temporary nyctalopia (Adaptation (eye)#Insufficiency).
Over a period of time, the mirror surfaces can become soiled. As a result of this the mirror scatters the light rays and degrades the recorded image.
Single-lens translucent camera - Wikipedia, the free encyclopedia