Originally posted by jonlg Samyang 8mm fisheye
Pentax 12-24mm f4.0 (Usable at 17/18-24mm on K1 FF) NO
Pentax 24-70mm D-FA 2.8 YES
Pentax 77mm Limited Maybe
Pentax 100mm Macro Probably Not
Tamron 80-200mm f2.8 Seriously consider
Tokina 80-400mm f4.5-5.6 Probably Not
Current plan is to take the:
Pentax 12-24mm, 24-70mm
Not sure whether to take the:
8mm fisheye or the 70-200mm f2.8 Tamron.
Skip the fisheye. I have shot in Yosemite several times and the scale of the place is such that there is little to be gained by shooting close and much to be gained by shooting "normal" and longer to about 200mm on 24x36mm.
28mm on Mist Trail at base of Vernal falls 35mm film
(no you really don't want to be closer most times of the year)
50mm from same spot as above 85mm on APS-C, Yosemite Falls from across the Valley 28mm on 35mm film, Yosemite falls from across the valley 150mm on 35mm film, Half Dome from Glacier Point 85mm on APS-C, Bridal Veil Falls from near their base.
Get closer to these falls and one can't really shoot due to spray on the lens.
Shot with my travel tripod. If I were shooting much longer, I would have wanted more tripod.
As for San Francisco, the city is, well, a city and doing highly creative work there with longer or shorter glass requires more knowledge of the place than most tourists can gain. Take your walk-around kit and have fun. As for what might work for the Coast Highway, think the British Coast and you have it covered...rock sea, villages, and boats.
With any luck, @mikeSF might drop in. He shoots all three locations regularly and likely would have good hints.
Steve