Originally posted by rparmar 35mm is just too close to the 40mm and 43mm limited lenses, one of which I own already. In fact looking at the limited lineup it is apparent how much bunching there is in the focal lengths: 15, 21, 31, 35, 40, 43, 70, 77.
This would be fine if we were using film bodies, but these miss the sweet spot of digital crop sensors. There is a huge gap between 21 and 31mm and also between 15 and 21mm. I'd much prefer a 28mm perfect normal to the 35mm. Pentax hasn't had a 28mm in production for a while, which is doubly odd considering how popular that length used to be.
That said, I am waiting for more info on the 15mm with bated breath. It could really fit a niche.
AMAF and AFAIC, I don't think the line up is so stupid anyway. Putting the FA limiteds aside (they were great with FF, but less so in APS, and as the 77 lmited is to be discontinued, I believe the others will be too), you get this:
15, 21, 35, 40 and 70
The 40 limited has some interest as a true pancake, so if you leave it out:
15, 21, 35, 70 and that is 23, 31, 50 and 105 in equivalent terms... For me it's more than enough (and when the 35 arrives then I have a great 21 ==> 70 line up with only three lenses...
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Actually, I love the DA Limiteds: so small you can easily forget about them, manual override on AF, all metal, reasonably fast and excellent optical performance...