Large APS-C (23.4 x 15.6 mm) sensor Large sensor in Sony A450 ensures a good low light image quality compared to smaller sensor, and it also provide shallow depth of field and a nice blurry background when needed.
Large Body Even the smallest lens attached to this body will be a burden to carry everywhere with you.
560g Carrying this weight all day may not be very comfortable for you.
Body Thickness 81mm With a thickness of 81mm,Sony A450 is not a pocketable camera for sure.