its actually f2.8-4.5... 1stop does make a different when you are in a desperate situation like ISO1600 yet unable to get sufficient shutter speed.i think f4 is not as slow lens as u think it is. correct or not?:dunno:
i think f4 is not as slow lens as u think it is. correct or not?:dunno:
... wider aperture also has effect on bokeh.. and AF speed..i think f4 is not as slow lens as u think it is. correct or not?:dunno: