Is the pentax smc da 17 70mm f 4 al if sdm worth it?

Yes, I think it's a sensible buy if you shoot a Pentax APS-C body and want one everyday zoom. On APS-C it frames like 26-105mm on full frame, so it covers wide scenes through short telephoto. The f/4 aperture isn't fast, so don't expect it to shine in dim rooms, but it's a good match for landscapes, where you'll mostly shoot between f/8 and f/11 anyway (Landscape). It also isn't stabilised, so keep shutter speeds up in low light. It fits most Pentax K bodies, including the Pentax KP, Pentax K-3 Mark III and Pentax K-70. For most hobby photography, APS-C is plenty (Sensor sizes).

Written by Claude from this site's pages.