http://www.sigmaphoto.com/images/LensesImage/77_small.jpghttp://www.sigmaphoto.com/images/LensesImage/78_small.jpghttp://www.sigmaphoto.com/images/LensesMtf/80_big.gif


Strony w jezyku angielskim
strona producenta (http://www.sigmaphoto.com/lenses/lenses_all_details.asp?id=3280&navigator=4)
opinie uzytkownikow na photosig (http://photosig.pcphotoreview.com/cat/pcphotoreview/digital-accessories/lenses/35mm-primes/sigma/PRD_85099_3111crx.aspx)
opinie uzytkownikow na photographyreview.com (http://www.photographyreview.com/cat/lenses/35mm-primes/sigma/PRD_85166_3111crx.aspx)
ciekawe porownanie do zooma EF 20-35L (chociaz zoom stary i wynik chyba przesadzony) (http://www.photo.net/sigma/sigma20-vs-canon2035)
krotki opis na photo.net (http://www.photo.net/ezshop/product?product_id=1184)
tu pojawi sie opis/test w pierwszej polowie 2006 :-) (http://the-digital-picture.com/Reviews/Sigma-20mm-F-1.8-EX-DG-Lens-Review.aspx)
watek na dpreview.com 'Are you happy with your Sigma 20 1.8' wraz z samplami (http://forums.dpreview.com/forums/readflat.asp?forum=1029&message=16583700)
opis na photozone.de (http://www.photozone.de/2Equipment/reviews/sigma20.htm)
test na photozone.de (http://www.photozone.de/8Reviews/lenses/sigma_20_18/index.htm)
opis i opinie uzytkownikow na fredmiranda (http://www.fredmiranda.com/reviews/showproduct.php?product=125&sort=7&cat=38&page=1)
kolejny test na prime-junta.net (http://www.prime-junta.net/pont/Reviews/a_Sigma_20_f1-8/a_Sigma_20_mm_f-1.8.html)
przykladowe zdjecia 1:1 na jacob.leverich.org (http://jacob.leverich.org/pix/2003.07.24-sigma_test/index.html) (podeslal bonk)
porownanie @20mm z sigma 12-24 f/4.5 - 5.6 i canonem EF 17-40f/4L (http://www.etischer.com/1dmk2/lenstests/20mm/test.html) (podeslal bonk)


Strony w jezyku polskim
opis na sigma-foto.pl (http://www.sigma-foto.pl/index.php?option=displaypage&Itemid=60&op=page&SubMenu=)
watek na Canon-Board.info (http://canon-board.info/showthread.php?p=115671)


Przykladowe zdjecia
www.pbase.com (http://www.pbase.com/cameras/sigma/20_18_ex)