I've been looking around for a sharp zoom lens. It doesn't matter whether there is distortion or not, as long as it could be fixed easily during post-processing. Then, i came across 2 type of lenses, fixed aperture lens and variable aperture lens. The fixed aperture lens cost ALOT more than the variable ones. Yes, the build quality is much better and some of them have special coatings.
Take a look at these 2 lenses:
NIKKOR 24-120mm f/4G vs NIKKOR 24-85mm f/3.5-4.5G
Yes, the zoom range might be more but the price is really alot more. at focal length 24mm, the 24-85mm can take in more light than the 24-120mm. It is only at mid-higher focal range where the 24-120 shine. But this doesn't justify the discrepancy in price. So i asked the sales woman, and she told me that the 24-120mm is able to take sharper photos. Then i wondered, how can i tell if she is telling the truth. Are there any specs to look out for? Or i should just read tons of reviews to know more about the lens that i'm interested in? >.>