Thanks for the info! Actually in Costco I have seen a Canon 60D with 18-200 IS (non-STM for sure, not sure if it was USM or not). Heard 60D has more manual settings, also thought it has a prism instead of a mirror and that the CMOS is physically bigger (maybe less noisy?). In the other hand T5i says it has a much better ISO value? Anyway, the reason why was thinking of T5i is also because of the better video capabilities -- or at least that's what people are suggesting, possibly because of the STM lens. Oh, and after spending some time in shops with camera one thing for sure: Nikon's housing was not for my hand. There is only a very little space for the thumb, whereas Canon has a better arrangement of the buttons, so you can hold it more comfortable. (That is my personal observations) Tamas On 13 May 2013 08:17, Herbert Graf wrote: > On Sat, 2013-05-11 at 22:29 +1200, RussellMc wrote: > > > STM is a Stepper Motor style of in lens focus motor as opposed to the > > more usual "USM" (ultrasonic motor.) > > USM works on a ring warping piezo electric drive principle. > > STM is newish. in some lenses only and targeted especially at video > > use. It tends to be slower to focus than USM but quieter and smoother. > > When it comes to Canon, there are really 3 types of focus motors, with > one type split into 2: > > 1) DC Motor - if a lens has no modifier on it of USM or STM, it is a DC > focus motor. They are generally slow, loud and have the issue of you > shouldn't touch the focus ring unless you've selected manual focus since > you can strip a gear > > 2) USM - lens marking is "USM". There are actually TWO types of USM, the > cheaper lenses (i.e. the 75-300 IS USM) has a version of USM that is > slower, louder and doesn't support manual focus override without hitting > the switch. Most other lenses have the "modern" USM that is very quiet > (but not necessarily silent), generally quick, and fully supports manual > focus override during AF. > > 3) STM - lens marking is "STM". This is the newest from Canon. There are > only 3 lenses with STM in them, the EF-S 18-135mm f/3.5-5.6 IS STM, the > pancake EF 40mm f/2.8 STM, and the newest 18-55mm f/3.5-5.6 IS STM. > Generally they are very quiet to silent (the 18-135 is silent, the 40mm > is very quiet, but can be heard in video). Focus speed is variable, the > 18-135 is VERY fast, the 40mm can be a little slower. Manual focus > overide IS supported. Only "odd" bit about these lenses is the focus > ring is NOT physically connected to the focus lens element. The ring is > connected to an encoder, all focus element movement is by the STM, even > in MF mode. The rub is that this lens will not allow manual focus > without power, and it feels a little weird turning a focus ring and not > having the element track immediately. You get used to it though. > > TTYL > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 int main() { char *a,*s,*q; printf(s=3D"int main() { char *a,*s,*q; printf(s=3D%s%s%s, q=3D%s%s%s%s,s,q,q,a=3D%s%s%s%s,q,q,q,a,a,q); }", q=3D"\"",s,q,q,a=3D"\\",q,q,q,a,a,q); } --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .