interesting enough I have just reply one of the member here in the forum the same question
As you see I have both of them and the 100mm 2.8, I guess I will just share why.
The order I bought these 3 are follow: DFA 100mm Macro, 77ltd and then the DA* 50-135.
First it was a no brain for 100mm macro because I love doing macro ( even I thought my shaky hands don't usually work with me) and I thought to myself I can use it for portraits as well. I soon find out that 100mm doing portraits is giving me quite a lot of space between the subject and I... actually sometime too far.. not to metion the Auto Focus with the DFA100mm is damn slow since the focus distance is quite long.
So after abit of saving and researching I get the 77ltd, the night I got it was one of my friend's wedding dinner, so I bought K10D along with it, with no flash in the typical chinese restaurant indoor lighting, the photos are sharp, high detail and great contrast. From then on, it always in my camera bag when I go out. I love it even more when I can use it on my K2 film camera
I bought the DA* 50-135 used from a guy switching to Canon. I use it mainly when I got on busy trip, camping and events where somewhere crowed. Silent focusing, weather sealing, ease of use, great range of view... and I don't want my 77ltd get hurt XD, I didn't use it as much as 77 because the size and weight of the lens, yes it maybe like having 50, 77, 100 and 135 with you, but it is also like holding them all at the same time :P while I can put my 35 in one pocket and another lens in the camera bag, 77 on the camera feel much comforting to hold.
so there you have it... I always have the 35, 77ltd and now the 12-24 with me in the smaller camera bag. Only when I need it I will carry the bigger backpack that has the 50-135, with flash and stuff. DFA 100mm is doing what it does best, macro and sometime portraits if I was lazy to change the lens.
Last edited by vizjerei; 10-09-2008 at 07:24 PM.