The Amazing Carson MiniBrite 5X PO-55: You gotta get this!
Wow! After I tried this out, I told everyone I knew about it, and then I ordered three more; one for each of my camera bags. Don't pay $50 or more for a scope to check out your sensor for dust. This $10.00 gadget does the job for a fraction of the price. It's a Carson slide-out 5X magnifier (replacing the older MiniBrite PO-25, a 3X unit) with an LED light. Lock up your mirror, open the shutter, and focus in on your sensor by holding the Carson magnifier just above the lens mount. Any dust, scratches, or other artifacts just pop out. You can even use a sensor brush or other tool to clean the sensor while you're looking at it with the magnifier. I'm rarely blown away by inexpensive gadgets, but this one belongs in every digital photographer's camera bag. Click the picture at right.