Originally posted by ghiaauto Then let's say which lens is the sharpest one! XD thanks
Most of the better sort of lenses (constant aperture zooms and primes) are going to be sharp enough. What I look for in a landscape/seascape lens is microcontrast and color rendition. Flare resistance is important because veiling flare can reduce contrast.
The ideal landscape lens would be a high end "slow" lens, like the DA 15 f4. With landscapes, you don't need, and really don't want, a fast aperture lens, since fast aperture lenses tend to have more glass, and more glass tends to mean less flare resistance and worse light transmission (which can affect color rendition), along with greater weight and cost. Unfortunately, manufacturers tend to regard slow glass as "budget" lenses, and so sometimes they use lower quality glass and skimp on the coatings of their slower lenses. Hence I've run across scores of Canon and Nikon landscape shooters trudging around with big, expensive f2.8 zooms, because those are the best zoom lenses available on those platforms. Pentax, on the other hand, has the best selection of high quality slower APS-C lenses. Some photographers complain about the "slow" apertures of the DA limiteds, but they're great for landscape work. Among the slower Pentax zooms, I would recommend the DA 10-17 f3.5-4.5, the DA 12-24 f4, the HD DA 20-40 f2.8-4, the DA 17-70 f4, DA* 60-250 f4 and the FA 20-35 f4. Other than the DA 10-17 and maybe the DA 20-40, these zooms will be more flare prone than the limited primes, but otherwise, in more subdued light they're plenty sharp and contrasty enough for landscape work. The f2.8 zooms can produce stunning images as well, although obviously the f2.8 is not needed for landscape work and the added weight of the fast lens is hardly welcome in the field.