i would take a look on amazon and you can get a really cool jewelers loupe for 9$. I got one a couple weeks ago to check my flower pre harvest. I highly recommended having one...those are visible to the naked eye in your pic, but just wait until you can see the non visible bug poop :P Plus it's just cool just looking at super close up on amazing flower also. You can see if the heads are still in tact or if the bud has been man handled, etc. https://www.amazon.com/gp/product/B00MMP6YJW/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
These cheap "jeweler's loupes" on amazon do the trick usually. They claim 20-60x or something, I don't really believe that, but they work.
I have one like this https://www.amazon.com/Bluedot-Trading-jewelers-loop-60x-Jewelers-Magnification/dp/B00MMP6YJW/ref=zg_bs_8090802011_34/131-9874862-0971406?_encoding=UTF8&psc=1&refRID=KZZ0NZVTM7TRMRNBQ9E2 (mine has some different brand but they're from the same factory anyway I'm sure) but I've seen various others from just searching "jewelers loupe" on amazon used and they all worked fine.
The 60X personal magnifier currency detector works pretty good. I got one off ebay, was the cheapest I could find.
Its for checking you tricomb production.
Bluedot Trading jewelers-loop-60x Jewelers Loupe, 60x Magnification https://www.amazon.com/dp/B00MMP6YJW/ref=cm_sw_r_cp_apan_glt_fabc_AP3MAYA2PMCHYJ18ZDM3
Bluedot Trading jewelers-loop-60x Jewelers Loupe, 60x Magnification https://www.amazon.com/dp/B00MMP6YJW/ref=cm_sw_r_cp_api_glc_fabc_9a16FbGZKWSAK?_encoding=UTF8&psc=1
This one works good