What fixed-focus lens does Pentax k50 match for novice photography?

If we don't consider some old manual focusing lenses of Pentax fixed-focus lens, the common ones are three biscuits of DA2/KOOC-0/DA40DA70, potato chips of Princess FA3/KOOC-0/FA43FA77 and DA40XS, and the title of 50m/KOOC-0/.8 made a few years ago, and that's all for DA35mm 2.4.

If you only have a fixed-focus lens, you can consider DA40 or DA40XS. The reason why DA50 header is not recommended is because the online evaluation of this header is so general. The only advantage is that it is cheap, and you can buy it for more than 800 yuan. The aperture of the DA35 head is 2.4, which is a disadvantage. The feeling I have used this head is very general.

All three biscuit heads are good heads, and you can choose DA2 1 and DA40. The focal part of DA70 is more like a human head, so it is not very convenient to match only one. If you can match two heads, DA2 1+DA70 will fly you.