Numerical Aperture and Resolution in Light Microscopy
Understand numerical aperture, diffraction-limited resolution, and practical trade-offs in optical microscopy. Learn NA vs magnification, condenser setup, and sampling.

Guides to help with your Stargazing Adventure

Information on Galaxies, Stars, Constellations, Planets, Moons, Comets and Asteroids
Listen to Bernard Miller describe his journey into AstroPhotography and detail how he captured this stunning image of the Sculptor Galaxy.
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Drew Evans talks about his passion for astrophotography, the equipment used and tips for post processing image data.
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Hear D.j Van Bourgondien as he talks about using his Celestron EdgeHD 8″ telescope to capture this image of the Fireworks Galaxy
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Below are a selection of our Articles, to find more click on one of the sections above, or use the Menu at the top of the page.
Understand numerical aperture, diffraction-limited resolution, and practical trade-offs in optical microscopy. Learn NA vs magnification, condenser setup, and sampling.
A deep guide to narrowband imaging in light-polluted skies: filters, workflows, gear, and processing tips for stunning nebula photos from the city.
Choosing the Best Telescope Eyepieces for Deep-Sky Observation Deep-sky observation is one of the most rewarding aspects of amateur astronomy, offering a glimpse into distant galaxies, nebulae, and star clusters. But to truly unlock the potential of your telescope, selecting the right eyepiece is essential. The eyepiece acts as the lens through which you view