Originally posted by Rondec Their goal is to make money and I think they would be afraid that releasing slower zooms would steal from the f2.8 zooms they already have out there.
Not sure I agree with that entirely. Slower does not necessarily equal cheaper. As a landscape shooter f/2.8 is not something I need very often but an excellent light weight f/4 zoom of the same quality as DFA 70-200 would be in my shopping basket. I will never be a customer for the 70-200 f/2.8 as I do not need the wide aperture and cannot afford the weight when hiking. But I would be happy to buy something similar to the DA*60-250 that is updated to modern standards and lens motor.
Same with the DFA 15-30, it is too heavy, does not easily use filters and has a wide aperture I do not need. For those that need the f/2.8 I am sure it is great and I am glad Pentax has it in the catalog for them. But for a hiking landscape shooter I would much rather have the modern equivalent of the FA 20-35 f/4.
Pentax needed the standard trio of f/2.8 lenses to establish themselves and that is fine. But they bill the K-1 as a 'field camera' so how about some 'field' lenses? Small, light weight, slower aperture, with reasonable filter rings and superb sharpness across the field. 18-35 f/4? 24-90 f/4? 60-250 f/4?