You asked
Is the pentax k 7 good for beginners?
The K-7 is a solid choice for a beginner who wants room to grow, but my pages don't give it a beginner rating, so judge it on what matters. It's an older DSLR, announced in 2009, with a 14.6-megapixel APS-C sensor and stabilisation built into the body, which helps with shake from any lens. The real draw is the Pentax K mount, which has a huge range of lenses, including old manual K lenses that fit directly.
For an everyday kit, I'd start with the Pentax smc DA 18-55mm f/3.5-5.6 AL WR for general shooting. Add the Pentax smc DA 50mm f/1.8 for cheap, pleasant portraits and low light. The Pentax smc DA 16-45mm f/4 ED AL is a good pick if you want wide landscapes.
If you're unsure, read your first camera and consider buying used to save money.
Written by Claude from this site's pages.