dslr 鏡頭重要 d 定 body 重要 d?

Beside Nikon or Canon... I can answer your question... 鏡頭重要 d 定 body 重要 d.... 100 % sure 鏡頭重要d... (but either one also not include your 技術.. that why 技術 should be 重要).
Being good lens can get what the GOOD photos in... soft, sharp, if you have Canon MarkIII.. but use 28-135 f5.6 compare with 70-200 f2.8.. I think you know which one is better... Due to the lens performance, even you have GOOD body.. but still can't get better photos...
** NOTE: I agree 28-135 f5.6 still can take good photos at any body.. but if compare with some lens king... sure is another level.. otherwise.. no lens to have so BIG $$ level difference.

For your choice... is Canon 450D at the market yet? For me.. if I can affort, I prefer Nikon D300 .... but it really depend how much you can spend... being lens will never end release new products... and canon 紅圈鏡 is doesn't mean anything... even Nikon 金圈鏡 as well... once again... 技術 is more 重要...

If you have Canon Mark III or Nikon D3, it doens't mean you will take a nice photos...

Enjoy!!

你用長攝、中距、標準、廣角還是微距鏡?
長攝推薦你用C記

想一鏡走天下就用zoom，不過通常zoom無禁利
平平地一支50mm f/1.8都玩得過