253446
Key Features Sigma has added OS , This is their own anti-shake system , Two FLD glass elements and three SLD glass elements for color aberration .6 blade diaphragm for background blur effect , Fast aperture of f2 .8 throughout the entire zoom range makes it very good for low light , A minimum focusing distance of 55.1 inches and Weight is 1430g / 50.4 oz .
 Sigma
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sigma