Camera Lenses: “Fast” vs. “Slow”. Does lens “speed” really matter that…, by Chuck Haacker, Counter Arts

A lens’s adjustable aperture — its iris diaphragm — controls the amount of light coming through the lens over time (controlled by the shutter). The wider its maximum opening, the “faster” any lens is…

Why do so many standard lenses for digital camera systems have f/3.5-5.6? - Quora

How to experimentally measure the effects of diffraction in my photographs and thus identify the optimal aperture for my camera lens - Quora

How much does a good camera cost? It starts from $200 and goes way up. Does MP matter? I don't have a big budget. Suggest a camera around $500. I like to

How do camera sensor sizes affect lens choices? - Quora

Old Photographers Never Die — They Just Lose Their Eyesight, by Chuck Haacker, Counter Arts

Why do so many standard lenses for digital camera systems have f/3.5-5.6? - Quora

Photography Has Nothing to do with Cameras.” — Lucas Gentry, by Chuck Haacker, Counter Arts

Absolutism in Photography — Primes v. Zooms, by Chuck Haacker, Counter Arts

Can a slower lens perform as well as a fast lens at the same f-stop? - Quora

This is Why I Always Use Autofocus, by Chuck Haacker, Counter Arts

Hand-held Light Meters in the Digital Age, by Chuck Haacker, Counter Arts

Now that digital cameras make great images at ISO 6400 with stabilized lenses, and software can sharpen, eliminate noise, and create out-of-focus backgrounds, does anyone need very expensive, very heavy, f1.4 prime

What is the mechanism that allows camera shutters to open and close so blindingly fast? - Quora