Lens, mitakon, ultrafast

by Mistral-75

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Free for any use, commercial included. No attribution required — though the photographer would not mind it.

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Holding camera lens, outdoors park

Unknown · 4460×2973

Oak leaves with autumn coloration

Stanature · 3448×4592

Aurora Borealis Alaska

United States Air Force photo by Senior Airman Joshua Strang · 3008×1960

TL Aurora Night 500 mm lens

Alex Gerst · 1280×851

TL Aurora Night 500 mm lens

Alex Gerst · 1280×851

Canon 70-200 f/2.8L on a Sargent crabapple tree

brenkee · 1024×585

Electronic, machine, computing

NASA/ARC · 1280×853

An Astronomer Fantasy: Planets in the Lab

NASA/JPL-Caltech · 1280×853

Astronauts, trajectory, control

NASA/JSC · 1280×853

Pilot Fullerton reviews checklist on Aft Flight Deck Onorbit Station

NASA/JSC · 1279×830

Women Adequately Filling Posts In NACA Laboratory

NACA Langley · 1024×1280

IT Expo

NASA/SSC · 1280×849