Comments about Sony Sony 2.3x Viewfinder Magnifier for the Sony "a" (alpha) DSLR Digital Cameras.:

In my macro photography work I find it helpful to have some additional magnification when doing fine detail/shallow depth of field work. This maginifer works well for focusing (which I strictly use manual focus for macro work). I use this magnifier on my Canon XTi camera. It does not fit the Canon Xti eyepiece however, BUT if you purchase the Pro Optic Angle Finder it comes with eyepiece adapters that this unit will attach to. As for Cons, it tends to crop the viewfinder information quite a bit, but since it flips up without having to detach from the camera it isn't too much trouble to compose first and then flip it down to assist in focusing.