Guys...I am so embaressed! Guess what! I took this flash to my hubby's retirement party , and ....I have never tested the flash on the hotshe!!!!!!!! All these questions that you guys were kind enough to answer me were in vain! I could use the flash as a off camera flash , period or try to put it on an umbrella . THe speedlite 300tl does have zoom ( 24-85 mm) and works on 2 modes hi and low . I would guess would be something between full capacity and 1/16 . I hope it would be like 1/8 .Any other thoughts about the usage of this great flash, thanks!