Hi, While there was an interesting debate over if people will trade off their video camera for a dslr: http://forums.macrumors.com/showthread.php?t=967289&highlight=dslr I was wondering if you would use any of the following wider angle lenses on a dSLR. If so, which ones. I was also wondering when and where the lens from group 1 will stop to "shine", compared to the "wonders" of groups 2 and 3. (Please, I am not saying in any way that groups 2 and 3 are not worth their price or their quality. I would just like to know what i am not getting for the higher price). The strong points of group 1: *Sharp Glass *Zoom Lens *f/2.8 Aperture *Price - Less than half of the price of any of the lenses in group 2, and less than one sixth of the price of any of the lenses in group 3. Group 1 Tokina 11-16 f/2.8 http://www.bhphotovideo.com/c/product/554035-REG/Tokina_ATX116PRODXC_11_16mm_f_2_8_AT_X_116.html Group 2 Carl Zeiss 18 mm. for dSLR http://www.bhphotovideo.com/c/product/655185-REG/Zeiss_1762_827_Distagon_T_18mm_f_3_5.html Carl Zeiss 21 mm. for dSLR http://www.bhphotovideo.com/c/product/655184-REG/Zeiss_1762_848_Distagon_T_21mm_f_2_8.html Group 3 Carl Zeiss 18 mm. for dSLR - Video or Cine lens http://www.bhphotovideo.com/c/product/687417-REG/Zeiss_1839_230_Compact_Prime_CP_2_18mm_T3_6.html Carl Zeiss 21 mm. for dSLR - Video or Cine lens http://www.bhphotovideo.com/c/produ...pact_Prime_CP_2_21mm_T2_9.html#specifications Thank you very much in advance! Very kind regards, Ignacio.