For maximum resolution in a scanning tunneling microscope (STM), an extremely sharp metallic tip is required, which serves as the point through which the STM “scans” a sample. A blunt tip reduces STM ...

How do I do the bleep test? Don't do the bleep test unless you have a reasonable level of fitness as it can be dangerous. Also avoid it if you have a history of medical problems. You will need the ...

From lens focal lengths and fill-flash to portraits, macro or stunning landscapes there are techniques for everyone. Learn how to use metering, considering composition and shoot everything from ...

Photos of test charts are taken across the range of apertures ... Canon RF 28-70mm f/2.8 IS STM: Verdict I feel that the ...