Review on 🔬 Koolertron 4.3" 1080P LCD Digital USB Microscope: 10X-220X Magnification, 8 LED Adjustable Light, Camera for Phone Repair, Soldering, Jewelry Appraisal, Biologic Use - Video Recorder Included by Holly Rodriguez

The microscope may have high magnification but poor resolution. As the microscope moves from top to bottom, an increasingly smaller portion (field of view) of the sample is optically projected onto the microscope's CCD sensor. The result is increased resolution enhancement (limited by the resolution of the optics and CCD). The up/down buttons on the microscope perform a digital zoom by selecting a subset of the sensor pixels and increasing their digital zoom. The picture gets bigger (zoomed) but the resolution doesn't increase (e.g. when watching upscaled SD programs on an HDTV). The pixel density of the display determines the size of the sample viewed on the screen. Good analogy: HD videos on your phone are much smaller than on a big HD TV, but both are the same HD resolution. It's just that the phone is smaller and has a much higher pixel density. Zooming in without increasing the resolution is sometimes called "empty zoom". This is good for PCB soldering, but useless when both magnification and resolution are needed (e.g. honeycomb). Magnification): - Top point (lowest magnification): 22mm on slide, 90mm on screen (4x) with 23 x 13mm field of view - Bottom point (maximum magnification): 2mm on slide, 90mm on screen (45x) at 2mm x field of view 1.1mm. The digital zoom button (arrow up) offers an additional 2x magnification (max. 90x on the microscope display). Viewing an image on a 27-inch HD display provides a 6x increase in viewable image size, but no increase in resolution. I'm assuming the CCD sensor is HD (1980x1080) but can't confirm. Images on the microscope screen were clear with good color rendition. I would rate the build quality as average for the price. The lighting system is good (and adjustable) but better diffusers could be used. Gooseneck lights are definitely needed at low focus (high stand). The UV filter has a thread, but is attached with double-sided adhesive tape. The rack and pinion had some play, but acceptable for this price range. The tube focuser was a bit stiff. The wireless control didn't work out of the box, but I was able to move the circuit board to make contact with the battery (not included). There was no PC software or download link in the box; However, the seller provided a link upon request. The instruction manual left a lot to be desired, but overall my first impression is that it is acceptable for the intended purpose (i.e. viewing objects visible to the naked eye and soldering a circuit board).