I'm a little unclear about the following paragraph....
Quote: Exceptional Image Rendition
Incorporating super-low dispersion glass elements and aspherical elements in its 11-element/eight-group optics, this lens effectively compensates various aberrations for high-contrast, high-resolution, fine-detailed images with minimal color bleeding.
I guess it's just Pentax hype.
I like the "you can put it in your pocket thing... but I'd seriously like it to be rated higher than a 7 on the user sharpness index here on the forum. The 18-135 is rated at 8.1, the DA 16-85 is rated at 8.9, and 17-70 at 8.6. It's hard to make a case for this lens compared to the other options you might want to try with it, especially since the 18-135 can often be found as part of a kit. I don't mind it being more cheaply constructed, like my DA 35 2.4, but I still want it to be good. After all my DA 35 2,4 is rated 9.2 on the sharpness scale,the 40s is rated 9.2 and the DA 50- is rated at 9.4. When looking at DA*, FA* and F* lenses, I generally look at lenses rated over 9.5. A rating of 7 just means I'm asking myself "can I actually use that." I think it's safe to say with a lens with rating of over 9 I'll use it, if it's cheap enough. With a rating of 7, same as the old 18-55, I'm not going to use it. I haven't used one of my two 18-55s as more than a body cap for years, and I gave one away. I have way to many much better options.
My F 70-210 is rated about 8.5 for sharpness.... and my 18-135 while rated 8.1 for overall sharpness is better than lenses rated much higher than it at some focal lengths. SO just from experience I'll use 8.5 if it has something else going for it.
My DA* 60-250 is rated at 9.5 for sharpness, and that makes me happy. As a big dollar purchase, my Sigma 120-400 didn't make me happy even though it was rated at 9.14 it went back. Sometimes you can get away with a little less image quality in a cheaper lens... but it has to be useful for something.
Looking at the current Pentax line up, there are 10 lenses rate 9.5 or higher, without going into blasts from the past, and 10 FA*s and probably a lot more F*s, A*s etc. if you really want to dig into it.
If I was aiming for something, it would be those lenses.
Maybe you can't get lenses like that right now, most of us can't. but if you understand where you're headed, and you pick up stuff along the way that will still be useful when you get where you're going.... from the sound of it the 18-50 is going to be a lens you use, until you get something better.
Save yourself some time get something better. DA 35 2.4, DA 50, 1.8 or 40 XS. They may not be the greatest, but they're good enough to always have a place in your bag.
Last edited by normhead; 06-14-2015 at 11:16 AM.