this is my first message on this forum.. greetings to everyone fm Turkey

Im beginner of the pentax user. I havebeen used compact kodak before
anyway

, one mount ago I bought secondhand lens "Pentax
smc a 80-200mm f4.7-5.6" ( price 80usd, pls advise good or not

) , its been my second lens , I have got pentax da 18-55 as otherone which came by k10d body
I wondering that how is the quality and performance about this lens. I usualy use my lenses for sport events ( bicycle, motorcycle ) and landspace photos.
now just want to use only one lens to use everywhere wihtout lens changing. in this case my second alternative SIGMA 28-300MM F/3.5-6.3 DG MACRO. is it good idea ?
according to your opinion Im going to decide to buy or give up my third lens ( sigma ) because, I dont have any idea and experience for both of lenses. ( sigma28-300 and pentax 80-200 )
thanks for yours help
