Numerical Aperture and Resolution in Light Microscopy
Understand numerical aperture, resolution, and illumination in light microscopy. Learn NA vs magnification, condenser NA, sampling, and depth of field.

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.
Read the full article here.
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
Read the full article here
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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, resolution, and illumination in light microscopy. Learn NA vs magnification, condenser NA, sampling, and depth of field.
Learn how to capture galaxies and nebulae under city lights. Gear, filters, exposure, stacking, and processing tips for urban deep-sky astrophotography.
Learn how to collimate a Newtonian reflector: tools, step-by-step methods, Barlowed laser, star testing, and pro tips for sharper views.