below are my summary after playing with them for quite some while ago.

Sickma focus real fast but does not guarantee pristine image quality, tammy in the other hand, offers quality instead of focusing performances.

Nikon offers both at the cost of 3 times more expensive. Canon offers an over priced lens at this FL range.

yeap, its still an overpriced lens

the IS at this FL is not necessary and the for the price, the image quality is nothing to boast about. If tamron can make it so cheap and yet still kicking ass in the image quality why can't them at least come close.





i tested with D70 & D200, on D70 it is pristine sharp while at D200, the lens obviously does not have as good resolved power compare to my N17-55. On canon, I tested it with 400D & 40D, and I notice the edge sharpness is not as distinctive as nikon variant, the Canon jpeg need a minor sharpening, but then it still obviously sharper than the C17-55IS. You might wan to test whether ur C Body having mis focus issue with the lens as usual.



p/s: i personally own some of the lenses or have access to it anytime to came to the conclusion. Not sit at home reading from INTERNET

I agreed on the 1740L offering much better value but not the 17-55IS, as for the bokeh, very subjective loh. majority of my clients are not die hard creamy bokeh lovers. As for the bluish, can easily fixed by WB adjustment or Hue adjustment lah.


the Sigma 18-50 is an very old lens, much pricier and not anything worth to boast about. I wouldnot mind using the 18-70 as a travel lens. still the only option that has a reasonably wide FL and offer 2.8-4.

cheers i dint say the N is cheap my 1st post already say the N is expensive. I also dint say N17-55 is newer than S1850.


My points is, for budget usage the T is worth the price while if u got the money to burn, go for the N if u use F mount lah of coz.
For canon, budget is still the T, but better options would be the C1740 rather than the C1755.

Worshiping rocks! At least it made a lot of persons felt great after paying luxury for gears


Don't worry I am not fanboy, i uses both C & N day in and day out. I find that most of the time, my C have problem on the focusing accuracy rather then the lens fault. If time permit, MF can get much better sharpness from the C lenses.