Malcolm,
I haven't used any of these lenses, but I was thinking about a similar
question.
Just in case you haven't seen this review, - it might give you some
impression of this lens, and answer some technical questions, including
some comparisons between different lenses in this range:
http://www.pentaxforums.com/reviews/hd-pentax-da-16-85mm-f35-56/general-image-quality.html
(It is spread over many pages, - this is just one of them, so use the
arrows to go "left" and "right".)
My lens is 17-70/4. I like it. It is not perfect: it is good at the wide
end, but becomes less sharp in the 50-70 range.
But I've stopped carrying 18-250 which is more "universal" in favor
of 17-70 which provides better quality for me, and I always have 50-135
for when I need the higher quality for 50+ mm.
I value the extra "17" vs. "18"mm, and the constant f/4 aperture. (f/5.6
becomes a bit too slow for my needs.)
So, as other people pointed out you'd probably need to figure out what
your most frequent subjects/scenes demand, and go from there..
Alternatively, you might buy just the lens that you _want_ to have. :-)
HTH,
Igor
On Wed, Oct 28, 2015 at 4:29 PM, Malcolm Smith wrote:
I have the opportunity to add either an 18-135mm WR lens, or a 16-85mm WR
lens to my collection at a discount.
In the past I would have jumped to add another lens, but as I already have
the 18-55mm WR & 55-300mm WR lenses, I am struggling to see what advantage I
would gain by acquiring either of these. I don't want equipment to sit in
boxes, I want things that will get regular use.
Is there any point in considering either of these, just in case I'm missing
something that makes one worthwhile?
Thanks,
Malcolm
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