i'm using both the tamron90 and sigma. for macro shots, the sigma gives me a further distance from the subject - abt .5m to 1m the tamron u need to get up to 6-10 inches from the subject. however pictures are sharper and bigger 1:1 for the tamron. i realli like macro and the tamron is my fav lens
im not so sure abt the canon but it sounds like with 50mm u'll have to be super close.
You'll have to use a tripod for the sigma when u take macro coz its really hard to focus at that distance. also any flash u use may be too far to reach etc. i tink for flowers its ok la, coz they dun run away and are not that small compared with insects. but theres still wind...
i bought the sigma first for the same reason as you, i needed a tele lens. i think its really a good buy considering its price and versatility. sharpness can't really say as im pro enough to find the difference the auto focus mechanism is really slow so i usually use manual.
if i had to bring ONE lens with me, i'd always take the sigma :thumbsup: i guess no rush to buy right? just try the sigma first la, when u realli wan to do some serious macro then get the dedicated macro lens.
if u wanna try my setup feel free to PM me, can jus follow me on my next weekend shoot.
just my 2 cents sry its so disorganized..very late already zzz