11887071 - Lensed galaxies in a cluster12376375 - Light shining through RGB prisms from a projector11718870 - Setting up a microscope11718871 - Setting up a microscope11718868 - Setting up a microscope12290866 - Lentils in test tubes in a test tube rack11718867 - Setting up a microscope12288363 - Optics of a divergent lens, 19th century11718869 - Setting up a microscope12050859 - Compound eye of a fruit fly,SEM11718872 - Setting up a microscope11637375 - Rain drops on a window at sunrise11628544 - Choosing a pair of glasses11562347 - Compound eye of a gnat,SEM11909021 - Compound eye of a mosquito,SEM11832435 - Microscope objective lenses with a spot o11908680 - Compound eye of a gnat,SEM11909582 - Compound eye of a bee,SEM11550207 - Choosing a pair of glasses11550134 - Head of a horsefly11752395 - Man holding a pair of glasses11550196 - Choosing a pair of glasses11822537 - Dried lentils,a type of pulse11550208 - Choosing a pair of glasses11752392 - Man holding a pair of glasses11908672 - Compound eye of a fly,SEM11752394 - Man holding a pair of glasses11752391 - Man holding a pair of glasses11752393 - Man holding a pair of glasses11997005 - Optical effect of a concave lens12583515 - Lensed quasars, gravitational lensing montage12644215 - Galaxy cluster and Einstein ring, HST image12553561 - Gravitational lensing, illustration12644214 - Abell 2537 galaxy cluster, HST image11675802 - Gravitational lensing,artwork11698738 - Gravitational lensing,conceptual image11887079 - Galactic gravitational lensing,HST image11887082 - Galactic gravitational lensing,HST image11887074 - Quintuple quasar (SDSS J1004+4112)11887080 - Galactic gravitational lensing,HST image11887075 - Galactic gravitational lensing,HST image11887077 - Galactic gravitational lensing,HST image11887073 - Twin quasar (Q0957+561)11887076 - Galactic gravitational lensing,HST image11887078 - Galactic gravitational lensing,HST image11887081 - Galactic gravitational lensing,HST image11887277 - Dark matter ring in galaxy cluster11754092 - Dark matter gravitational lensing