intend to purchase my tamron 17-50mm f2.8 2ml at T.K whihc offers $620.
wondering...how would your test?..
assuming i'll b bringing down a test chart. shd i jus test at f2.8 itself or shd i test from f2.8 then keep increasing the f stops to ensure sharpness?
basically...they allows me to test a few sets before purchasing..hence...dun wanna miss e chance of selecting the best for my 450d.
would be great if your can input the methods of testing that your usually do...
did check the forum..but very brief...basically mention, using test chart and c for the front n rear focusing...
sorry for the noobs question/request ya..
1st time buying my lens...