ASTRONOMICAL EYEPIECES Carl Zeiss Eyepiece (14 mm) Orthoscopic Carl Zeiss Eyepiece (15 mm) Orthoscopic Celestron Eyepiece (6 mm) Plossl Carl Zeiss Eyepiece (15 mm) Orthoscopic Celestron Eyepiece (7.5 mm) Plossl Celestron Eyepiece (10 mm) Plossl Celestron Eyepiece (12 mm) Orthoscopic Celestron Eyepiece (17 mm) Plossl Plossl eyepieces (26 mm, 20 mm, 17 mm, 10 mm, 7.5 mm) Celestron Eyepiece (25 mm) Osthoscopic Clavé Eyepiece (6 mm) Plossl Clavé Eyepiece (8 mm) Plossl Clavé Eyepiece (20 mm) Plossl Clavé Eyepiece (25 mm) Plossl Clavé Eyepiece (40 mm) Plossl Surplus Eyepiece (32 mm) Erfle Intes Eyepiece (14 mm) Kelner Konus Eyepiece (25 mm) Plossl Konus Eyepiece (40 mm) Plossl Meade Series 5000 28mm Super Wide Angle Meade Series 5000 28mm Super Wide Angle Meade Eyepiece (8.8 mm) Wide Algle Televue Eyepiece (9 mm) Nagler Type 1 Explore Scientific Eyepiece (9 mm) 100º Series Nitro-Purged Explore Scientific Eyepiece (9 mm) 100º Series Nitro-Purged Televue Eyepiece (9 mm) Nagler Type 1 Televue Eyepiece (12 mm) Nagler Type 4 Televue Eyepiece (13 mm) Nagler Type 6 Televue Eyepiece (13 mm) Nagler Type 6 Televue Eyepiece (13 mm) Ethos Televue Eyepiece (13 mm) Ethos Televue Eyepiece (20 mm) Nagler Type 2 Televue Eyepiece (20 mm) Nagler Type 2 Televue Eyepiece (31 mm) Nagler Type 5 Televue Eyepiece (31 mm) Nagler Type 5 Televue Eyepiece (24 mm) Panoptic Televue Eyepiece (24 mm) Panoptic Televue Eyepiece (35 mm) Panoptic Televue Eyepiece (35 mm) Panoptic Baader Hyperion (13 mm) Eyepiece (32 mm) Plossl Russian Eyepiece (25 mm) Plossl Soligor Eyepiece (12.5 mm) Lanthanum Takahashi Eyepiece (30 mm) LE Takahashi Eyepiece (24 mm) LE Takahashi Eyepiece (18 mm) LE Takahashi Eyepiece (7.5 mm) LE Takahashi Eyepiece (5 mm) LE TS Planetary Eypiece (TMB) (2.5 mm) Coronado Cemax (18 mm) Coronado Cemax eyepieces (12 mm, 18 mm, 25 mm, X2 barlow) Coronado Cemax eyepieces (12 mm, 18 mm, 25 mm, X2 barlow) Zoom Eyepiece LV Vixen (24/8 mm) Lunt Zoom Eyepiece (7.2/21.5 mm) Pentax Zoom Eyepiece (6.5/19.5 mm) Baader Hyperion Zoom Eyepiece (8/24mm) Vixen Eyepiece (26 mm) Plossl Vixen Eyepiece (20 mm) Lanthanum Wild Eyepiece (25 mm) Nikon Eyepiece (25 mm) Nikon Eyepiece (18 mm) Nikon Eyepiece (12.5 mm) University Optics Orthoscopic Eyepiece (9 mm) Unitron Guiding Eyepiece (12.5 mm) orthoscopic Meade CCD framing Eyepiece (25 mm) Plossl Binoviewer William Optics Binoviewer William Optics Binoviewer William Optics Binoviewer William Optics Binoviewer William Optics Meade X2 Apochromatic Barlow Orion X2 Short Barlow Antares X1.6 Barlow Televue X1.8 Barlow Televue X2 Apochromatic Big Barlow Televue X2 Apochromatic Big Barlow Televue X3 Apochromatic Barlow Televue X2.5 & X4 Powermates Zeiss Abbé X2 Barlow Parafocalizing rings Eyepiece Briefs Evolution of Eyepieces (Diagram) LORD, C.J.R. (1997). Evolution of Eyepieces (3Mb PDF File) Visual impressions Planets and some stars show a limited amount of color. Galaxies and nebulae show none. The Orion nebula looks slightly green to some observers. Below you can see two images of M42. One of the images was processed to simulate a telescopic view. Color can only be seen in the bright objects in the night sky, such as stars, planets, and bright planetary nebulae. However, experienced amateur astronomers realize that very few deep-sky objects, such as emission or reflection nebulae, will show any color at all visually, even in the largest telescopes. This is because most objects are just not bright enough to stimulate the eye's cone cells in the retina which detect color. The rod cells in the retina, which are sensitive to faint light, see only in black, white and shades of gray. Focus animation.