There is a quite good image store website, you can upload any resolution image you want and then paste the link, that has preview and is visible here on Pentaxforums. But the site is russian and I don't know how to delete images from there at any point of time I want. But there is possibility to remove pictures lets say after 1 hour or 1 day, or even 30 days, if you click the box before uploading
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---------- Post added 04-22-19 at 02:40 PM ----------
I do focus adjustment in more practical way, that even don't needs shutter action, especially on cameras, that has focus peaking.
I use tripod and some flat contrast target on 45 degree. I enable focus peaking in Live view, center the point I want to focus at 16x magnification and then perform contrast detection auto focus by half-pressing the shutter. You can see on dysplay the highlighted zone of focus peaking, it is evenly distributed accross the target point. Then I shut down Live view, defocus the lens by hand and perform Phase detection auto focus (via viewfinder) by half-pressing the shutter. After that I return to Live view and chech the focus peaking highlighted zone. You can perform 5-10 repeated actions to check the trend of phase detection autofocusing. In case the highlighted focus peaking zone is more back compared to your target point, you need + adjustment, and vise versa.