Originally posted by PANGU_yien
Don't listen to irrelevant comparisons like "slow compared to primes" or "not as fast as a 2.8". Those comparisons don't hold much value as this isn't a prime and you'd generally pay more for a 2.8 in a Pentax mount. With Pentax's latest DSLR sensors, 4.0 constant is FINE for most applications. Another advantage over the kit lens is the 4.0 constant aperture throughout the whole focal range. This makes it much easier to use manual flash if you ever get into flash photography.
LOL
Pretty much all zooms are slow compared to primes (exception being mostly some inexpensive older primes that may be slower than 2.8)
and a 2.8 zoom from any brand will cost substantially more than a DA14 - Exception being some zooms that may be 2.8 at the wide end - but 4.5 at the long end)
You tube is probably the single worst spot to look for any camera equipment reviews. almost all are fanboys of one brand or another who generally slag alternative brands, and rarely do any testing that has any substance.
As for the wobble it's not as unusual as you would think i get some in my Sigma 24-70 2.8. never had it affect the shot though