Manual Focus Mode
With the manual focus mode, you can make fine adjustments to have the perfect focus. 25 mm - Good Wide Angle Coverage
Even though there are very good examples of landscapes photos taken with tele lenses, most of the landscape photos are taken with wide angle lenses. Environmental Sealings
Landscape photographs are taken outdoors and you should be prepared for all kind of weather conditions.
Average Resolution Sensor: 16.0MP
Pentax RZ18's 16.0MP resolution is not ideal for landscape photography but you can still achieve large prints with good framing and technique.
No Manual Exposure Mode
A correct exposure of a landscape shot is very important. Even though modern digital cameras features advanced algorithms to calculate the right exposure, they still may fail some difficult conditions. Lack of manual exposure mode in these conditions means lot of shadow and highlight clipping. No RAW shooting capability
RAW files contains much more color information compared to JPEGs, and gives you more room for post processing without significant quality loss. They provide wider dynamic range and option to recover shadow and highlight clipping to some degree. Small 1/2.33" (6.08 x 4.56 mm) sensor
Pentax RZ18's small sensor struggles in low light situations compared to larger sensors.