Originally posted by normhead
The only thing that bothers me is the weight and size. I'm seriously considering the DA*200 ƒ2.8 be cause it saves me a half pound, instead of costing me two over my DA*60-250. I can carry 2 or 3 lenses in the space a 150 -450 will take in my bag, and I can carry two lenses in the space the DA*60-250 takes in my bag by going with the 200 and 1.4 TC. I really think the lens that would be perfect for me doesn't exist. The DA* 15-450 2.8, half pound wonder is what I need.
Pentax put in one too many digits on that first number, and forgot the * and the ƒ2.8

Well Said!!! Fear not, Norm...
20 years ago I saw the Star Trek "whale" movie, where Scottie swapped the formula for "transparent aluminum". I want the same lens you do, with rear end filters, with *star coatings and big apertures, with elements of zero CA transparent aluminum. I'd dump the vacation home or single malts for life to pay for it... Now if they can only engineer the materials before "go out feet first"

---------- Post added 05-13-15 at 04:26 PM ----------
I am a serious APSc shooter, subject matter driven. Need the APSc crop and pixel density for little/ flying critters. FF would be nice, but a non-starter at less than 50mp. In short, my wife and I have time... For the Big Valleys, I use a 16-50 DA* (believe it or not in portrait) for panoramics and "stitch them" in PP. 12-24 works for "tidy widies"... Downside of APSc vs FF.
So this week's clean outs (fiscal sanity): 55-300 HD DA. Great compact lens, goes in a pocket for high crime areas with a 18-135 AW DC WR (whatever, likely a clean out too) as partner. Dumped all FA* zooms and shorties late 2014 to fund the DFA. It would be nice to keep these two for wet/ Baltimore/ Ferguson/ Somalia, but Mrs doesn't shoot in rain. We typically avoid tear gas and civil wars as well. DA*s and 150-450 DFA are gasketed. A true sport, the carries the handheld shelter (golf umbrella) since she opts not to "slog" and becomes executive producer (tells me what/where to shoot). I slog and shoot...
After playing with 150-450 DFA (the new portable weightlifting unit which I initially got for HER IQ), she's keeping much lighter Siggy 120-400 (safe from rain, above

) and she will do more PP. We shoot them HH half of the time (talk about breath control challenges)... I have preferred long primes 300 FA* and DA* with TCs for range (No 400-600 prime in the barn). Tripods enable cardio-pulmonary respiratory recovery (pre CPR)...
So, now the range seems like 12-24 DA (stays at home a lot), and 16-50 DA*, 50-135 DA* and 150-450 DFA in the bag. She loves her 18-270 SDM for walking around with the Siggy. If I'm walking around the 60-250 has been my "go-to" for years. with the 1.4x HDTC, very versatile for most near and slow critters.... Since APSc is a given for now, seems that my favorite walk around might be shelved half-time or at worst, fall to a F2.8 successor...Like losing a "best friend). Big glass stays home until the picnic basket rolls...
Someone mentioned that there is a sturdy back brace at Home Depot that could make schlepping the 150-450 more tenable...?