10 Best Diagonals for January 2021

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Meade Instruments 07680 Series 5000 2-Inch Enhanced Dielectric Diagonal Mirror with Schmidt-Cassegrain Adapter (Black)
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Meade Instruments 07680 Series 5000 2-Inch Enhanced Dielectric Diagonal Mirror with Schmidt-Cassegrain Adapter (Black)

by Meade
What We like

Comes with a 1-year limited

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Product Features

  • Interferometer-tested for excellent performance
  • Optics are made with Pyrex glass
  • Dielectric coatings for the most light transmission possible
  • Multi-layered dielectric coatings that produce 99-Percent reflectivity for brighter, sharper images

Multi-layered dielectric coatings that produce 99-percent reflectivity for brighter, sharper images Interferometer-tested for excellent performance Dielectric coatings for the most light transmission possible Optics are made with pyrex glass

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Celestron 2-Inch XLT Diagonal Mirror (for SCT Telescope)
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Celestron 2-Inch XLT Diagonal Mirror (for SCT Telescope)

by Celestron
What We like

Includes a 2 to 1.25 adapter and aluminum carry case

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Product Features

  • 2 SCT mirror diagonal with high performance XLT coatings
  • Housing is precision machined to achieve and hold good optical alignment.
  • 1/10th wave mirror is tested with an interferometer to ensure quality

2 sct mirror diagonal with high performance xlt coatings Housing is precision machined to achieve and hold good optical alignment. 1/10th wave mirror is tested with an interferometer to ensure quality

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VIVO 100 inch Diagonal Projector Screen, 16:9 Projection HD Manual Pull Down (PS-M-100)
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VIVO 100 inch Diagonal Projector Screen, 16:9 Projection HD Manual Pull Down (PS-M-100)

by VIVO
What We like

DURABLE METAL CASING for Dual Wall and Ceiling Installation Design perfect for home or business

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Product Features

  • SCREEN MATERIAL 1.1 GAIN with standard black backing to eliminate light penetration. Four side black borders enhance picture contrast
  • CRISP VIEWING ANGLES up to 120 degrees with a matte white surface diffusing light in all directions
  • MOUNTING OPTIONS which can be utilized for an easy ceiling or wall mounting process. Please Note: Mounting hardware not included
  • UNIVERSALLY COMPATIBLE with majority of LED, LCD or DLP projectors on the market

Crisp viewing angles up to 120 degrees with a matte white surface diffusing light in all directions Mounting options which can be utilized for an easy ceiling or wall mounting process. please note: mounting hardware not included Universally compatible with majority of led, lcd or dlp projectors on the market Screen material 1.1 gain with standard black backing to eliminate light penetration. four side black borders enhance picture contrast

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Solomark 2inch Explorer Enhanced Dielectric Diagonal Mirror with 2inch-1.25inch Adapter - Enhanced 99% REFLECTIVITY for Maximum View Brightness and Sharpness- Carbon Fiber Side Plates
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Solomark 2inch Explorer Enhanced Dielectric Diagonal Mirror with 2inch-1.25inch Adapter - Enhanced 99% REFLECTIVITY for Maximum View Brightness and Sharpness- Carbon Fiber Side Plates

by Solomark
What We like

Explore the nature of the world -This 2inch mirror diagonal features sophisticated, Multi-layered dielectric coatings that provide an astounding 99% reflectivity for maximum view brightness and sharpness.

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Product Features

  • 100% carbon fiber side plates and Baffles is machine-threaded and anti-reflection process for high contrass
  • Nosepiece barrel is threaded to accept 2" filters. 2 pieces of brass lock screws for eyepiece or adapter and brass Compression rings features more precision and prevent barrels or the surface of eyepieces from marring and scratching.
  • Comes with a 2"-1.25" step-down adapter which allows to use 1.25" eyepieces and other 1.25" accessories. Endcaps included.
  • High precision optical glass with 10mm thick mirror substrate.

Comes with a 2"-1.25" step-down adapter which allows to use 1.25" eyepieces and other 1.25" accessories. endcaps included. High precision optical glass with 10mm thick mirror substrate. 100% carbon fiber side plates and baffles is machine-threaded and anti-reflection process for high contrass Nosepiece barrel is threaded to accept 2" filters. 2 pieces of brass lock screws for eyepiece or adapter and brass compression rings features more precision and prevent barrels or the surface of eyepieces from marring and scratching.

5
EYES PC Blue Light Blocking Screen Protector Panel for 23 and 24 inch Diagonal LED PC Monitor (W 21.06 X H 13.78 inch)
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EYES PC Blue Light Blocking Screen Protector Panel for 23 and 24 inch Diagonal LED PC Monitor (W 21.06 X H 13.78 inch)

by EYES PC
What We like

Absolutely the best optical quality Blue Light Blocking Panel available today. Easy installation and removal.

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Product Features

  • Anti-Blue Light blocking between 380nm~495nm for wide range HEV protection. Sizes to fit most monitors. Reduces digital eye strain when viewing LED screens: Office PC, Home PC, eSports or eGaming.
  • Blocks 100% of Hazardous UV light and reduces HEV Bluelight up to 100% with excellent Color Transmittance.
  • Reduces digital eye strain when viewing LED screens: Office PC, Home PC, eSports or eGaming.
  • Buy Genuine EYE PC, Beware of cheap copies or thin films that don't work. U.S. PATENT & TRADEMARK REG. No: 4,762,211. DUNS NO: 004043131. U.S. GOV. CAGE CODE 8EGE8.

Reduces digital eye strain when viewing led screens: office pc, home pc, esports or egaming. Anti-blue light blocking between 380nm~495nm for wide range hev protection. sizes to fit most monitors. reduces digital eye strain when viewing led screens: office pc, home pc, esports or egaming. Blocks 100% of hazardous uv light and reduces hev bluelight up to 100% with excellent color transmittance. Buy genuine eye pc, beware of cheap copies or thin films that don't work. u.s. patent & trademark reg. no: 4,762,211. duns no: 004043131. u.s. gov. cage code 8ege8.

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MOSISO 25-27 inch Computer Blue Light Blocking Screen Protector Anti-UV Eye Protection Filter Film for Diagonal 25,25.5,26.5,27 inch 16:9 Widescreen Desktop PC LED Monitor Panel(25x16.34 inch/LxW)
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MOSISO 25-27 inch Computer Blue Light Blocking Screen Protector Anti-UV Eye Protection Filter Film for Diagonal 25,25.5,26.5,27 inch 16:9 Widescreen Desktop PC LED Monitor Panel(25x16.34 inch/LxW)

by Mosiso
What We like

Made of Acrylic. It can effectively prevent screen from dust and scratch. Perfectly works in office / home for OL, gamer and programmer.

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Product Features

  • Dimension: 25 x 16.34 inch/L x W. Compatible with Lenovo G25-10 25 inch, ASUS PB258Q Black 25 inch, Dell i7777-5507SLV-PUS Inspiron 27 inch, Dell P Series 27 inch, Dell Ultrasharp U2718Q 27 inch, HP Pavilion/Envy 27-inch All-in-One, HP EliteOne 1000 27 inch, ASUS ZenAiO 27 inch, ASUS ROG PG279Q 27 inch, Acer G276HL Kbix 27 inch, Samsung 27 inch, LG 27UK650-W 27 inch, most 25, 26, 27 inch LCD/LED/HD computer monitors.
  • Ultra thin to 0.01 inch of 95% clear transparency, which will not darken your laptop screen, keeping the original screen brightness.
  • Fits diagonally measured 25, 25.5, 26.5, 27 inch 16:9 widescreen desktop PC LED monitor panel. Please measure your diagonal dimension before purchase. Protects your eyes by filtering and curbing 99% harmful UV. Anti-blue light between 420nm - 460nm can be reduced by 45% for HEV protection.

Ultra thin to 0.01 inch of 95% clear transparency, which will not darken your laptop screen, keeping the original screen brightness. Fits diagonally measured 25, 25.5, 26.5, 27 inch 16:9 widescreen desktop pc led monitor panel. please measure your diagonal dimension before purchase. protects your eyes by filtering and curbing 99% harmful uv. anti-blue light between 420nm - 460nm can be reduced by 45% for hev protection. Dimension: 25 x 16.34 inch/l x w. compatible with lenovo g25-10 25 inch, asus pb258q black 25 inch, dell i7777-5507slv-pus inspiron 27 inch, dell p series 27 inch, dell ultrasharp u2718q 27 inch, hp pavilion/envy 27-inch all-in-one, hp eliteone 1000 27 inch, asus zenaio 27 inch, asus rog pg279q 27 inch, acer g276hl kbix 27 inch, samsung 27 inch, lg 27uk650-w 27 inch, most 25, 26, 27 inch lcd/led/hd computer monitors.

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William Optics 2
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William Optics 2" 99% Dielectric Dura Bright Carbon Fiber Mirror Diagonal for SCTs

by William Optics
What We like

Dialectric Diagonal

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Product Features

  • Carbon Fiber

Carbon fiber

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EYES PC Blue Light Screen Protector Panel 14
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EYES PC Blue Light Screen Protector Panel 14" Diagonal LED Laptop Screen (W 12.72" X H 8.03") Blue Light Blocking up to 100% of Hazardous HEV Blue Light from LED Screens. Reduces Digital Eye Strain!

by EYES PC
What We like

Absolutely the best optical quality Blue Light Blocking Panel available today. Easy installation and removal.

more infoarrow_drop_down

Product Features

  • Anti-Blue Light blocking between 380nm~495nm for wide range HEV protection. Sizes to fit most monitors.
  • Blocks 100% of Hazardous UV light and reduces HEV Bluelight up to 100% with excellent Color Transmittance.
  • Buy Genuine EYE PC, Beware of cheap copies or thin films that don't work. U.S. PATENT & TRADEMARK REG. No: 4,762,211. DUNS NO: 004043131. U.S. GOV. CAGE CODE 8EGE8.
  • Reduces digital eye strain when viewing LED screens: Office PC, Home PC, eSports or eGaming.

Blocks 100% of hazardous uv light and reduces hev bluelight up to 100% with excellent color transmittance. Reduces digital eye strain when viewing led screens: office pc, home pc, esports or egaming. Buy genuine eye pc, beware of cheap copies or thin films that don't work. u.s. patent & trademark reg. no: 4,762,211. duns no: 004043131. u.s. gov. cage code 8ege8. Anti-blue light blocking between 380nm~495nm for wide range hev protection. sizes to fit most monitors.

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William Optics 2
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William Optics 2" 99% Dielectric Dura Bright Carbon Fiber Mirror Diagonal for Refractors

by William Optics
What We like

We don't know when or if this item will be back in stock.

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10
Orion 8787 1.25-Inch Correct-Image Star Telescope Diagonal
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Orion 8787 1.25-Inch Correct-Image Star Telescope Diagonal

by Orion
What We like

Provides a view through your telescope that matches normal daytime orientation for added comfort and ease of use

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Product Features

  • Fully coated prisms for superior image fidelity
  • For terrestrial or astronomical use, this1.25" 90 degrees diagonal produces a right-side-up, no reversed image
  • Requires no extra focus travel
  • Not intended for use with reflector telescopes

Fully coated prisms for superior image fidelity For terrestrial or astronomical use, this1.25" 90 degrees diagonal produces a right-side-up, no reversed image Not intended for use with reflector telescopes Requires no extra focus travel

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