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Best Large Aperture Mirror

HMANE Telescope Reflector Main Mirror 1600mm with Secondary Mirror 40mm, Newton Reflector Spherical Mirror DIY Astronomical Telescope Mirror Kit, 226SQ59LARZVJE14JMZ8XR

  • Contains a primary lens with an objective lens diameter of 203mm and a focal length of 1600mm, and a secondary mirror with a short axis (short side diameter) of 40mm length. This is the core component of a set of mirrors..
  • Features: The main mirror is a spherical mirror with aluminized surface and a protective film to prevent scratches on the main mirror under light touch. The workmanship is excellent..
  • Advantages: Compared with cheap telescopes on the market, our primary mirror has a diameter of 203mm and a large-aperture optical glass with a focal length of 1600mm, which can see farther, and the focal length is as high as 1600mm, which can significantly reduce the imaging failure caused by spherical aberration. Real, greatly improved the experience, this is a professional DIY telescope lens set..
  • This kit has more collection and commemorative opinions. At the same time, the lens can support the famous schlieren experiment. It can make the home a laboratory in seconds, suitable for teaching, childrens hobby training, hands-on and other ability training..
  • Tips: For the fixation of the eyepiece, lens barrel, and fixed lens. You need to buy them by yourself..
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TOGURDEYE Dash Cam Mirror 12in 4K Rear View Mirror Camera Voice Control GPS and Speed Full Touch Screen w/Waterproof Reverse Backup Camera Dash Cam Front and Rear w/Parking Assistant Night Vision

  • ??[4K Ultra HD Dash Cam Mirror]Features 4K ultra high resolution, this rear view dash cam captures the car's license plates and road signs in a super....
  • ??[Wide Angle No Blind Area Dash Camera]This car driving recorder employs 170° super wide angle lens front camera, 160° rear camera. Offers you a....
  • ??[Built-in Voice Commands]You can operate this rear view mirror camera instead of touching the screen to lock the video, switch the front/rear camera....
  • ??[Super Night Vision]Equipped with SONY STARVIS sensor and F1.8 large aperture 6-glass lens, this car camera can capture clearer and more detailed....
  • ??[GPS Rear View Mirror Camera]Extra GPS module tracks the real-time driving speed, trajectory. You can exactly know when and where the events....
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Homebrew Build Digital Voice Reflector for only 10USD server (Japanese Edition)

  • This wide-field reflector telescope has enough aperture for great views of the Moon, planets, and many bright deep-sky objects.
  • A fantastic general-purpose astronomical telescope - great for the beginner to test the waters with mirror optics large enough to keep you and your family busy viewing for years to come.
  • Included Shorty 2x Barlow doubles the magnification of both included eyepieces.
  • Use the included Star Target Planisphere, MoonMap 260, Telescope Observer's Guide book, and keychain red LED flashlight to plan stargazing sessions.
  • Take pictures of solar system objects with the included Smartphone camera adapter.
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Telescope for Kids,Nvlifa Astronomical Refracting Telescopes for Astronomy Beginners Adults with 3 Rotatable Eyepieces,70mm Aperture 400mm AZ Mount Travel Telescope and Adjustable Tripod,Carry Bag

  • ...ics glass lens with high transmission coatings creates stunning images and protects your eyes. This telescope provides erect image optics, perfect for terrestrial and astronomical use. Christmas and Thanksgiving are coming soon, give the children more meaningful gifts to make their childhood more colorful..
  • 【Large Aperture】70mm aperture and 400mm focal length provide more lights and clearer images. The bigger the aperture, the bigger the field of vision, and the clearer the image. The telescope built-in 128° zenith mirror, in line with the actual human mechanics, more comfortable to observe the night view..
  • 【Adjustable Tripod】Our refractor telescope comes with thicken adjustable aluminum tripod, the height of the tripod can be adjusted from about 22.04in to 47.24in. Stable and durable, multi-directional adjustment to meet the needs of different observation angles. Smartphone adapter for mobile phones to take pictures, happy sharing with your family and friends..
  • 【Easy to Install & Carry】With the bag we deliver, it’s convenient to pack up and carry the telescope for your travel and outdoor observation. Don't worry about any installation problems. Even first-time users install it themselves without any tools. This must be an ideal telescope....
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Magnetic Installation 4K WiFi Mirror Dash Cam 12'' Backup Camera Rear View Mirror Camera for Car with IMX415 Sensor, APP Control, 64GB Card Pre-Installed, HDR, GPS, G-Sensor

  • ... to unload the rearview mirror, you can install the dashcam to the rearview mirror with straps. If you encounter any problem during installation or use, please contact our customer service in time..
  • [ Enhanced Night Vision & Parking Assistance ] Equipped with advanced High Dynamic Range ( HDR technology ) F1.8 Large Aperture, 6-Glass Lens, the 4K front and 1080P backup camera can automatically balance the light and dark area of the video to give you a better night vision experience..
  • [ Loop Recording & Super Wide Angle ] The mirror dash cam will auto loop recording. No manual adjustment is required, ensuring your driving safety. 170° front angle lens and 140° rear angle lens, minimizing the blind area of vision and capturing more scenes on the road..
  • Multi-function, Safer Driving: ①Streaming Media Rearview.
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4K WiFi Mirror Dash Cam, EUKI 11'' Rear View Mirror Camera Smart Dual Dash Cam with Sony IMX415, APP Control, 64GB Card Pre-Installed, HDR, GPS, G-Sensor, Parking Assistance

  • ...ronment. No manual adjustment is required, ensuring your driving safety. 170° front angle lens and 140° rear angle lens, minimizing the blind area of vision and capturing more scenes on the road..
  • [ Enhanced Night Vision & Parking Assistance ] Equipped with advanced High Dynamic Range ( HDR technology ) F1.8 Large Aperture, 6-Glass Lens, the 4K front and 1080P backup camera can automatically balance the light and dark area of the video to give you a better night vision experience..
  • [ Easy Installation ] No need to unload the rearview mirror, you can install the dashcam to the rearview mirror with straps. If you encounter any problem during installation or use, please contact our customer service in time..
  • Multi-function, Safer Driving: ①Streaming Media Rearview.
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Yongnuo YN42.5MM F1.7M II Medium Auto Focus Fixed Prime Lens, for Micro Four Thirds Cameras, Compatible with Olympus Panasonic

  • 【Features】F1.7 large aperture, 9 blades in 8 groups, including 2 ED ultra-low dispersion lenses. 7pcs Aperture blades, Auto Focus and Manual Focus.
  • 【Compatible with Olympus and Panasonic Cameras】Olympus: E-M5 Mark II, E-M10 mark III, E-M10 IV, E-PL9, E-PL10, PEN-F.
  • Panasonic: G100, GH5, G9, G95, G85, GX9, GX85, GF-10, GF-9, GF-8.
  • 【Micro 4/3 System Standard Prime Lens】Micro Four Thirds Lens Mount ( M4/3 MFT System), suitable for landscape, portrait, street snap, night scene and indoor scene..
  • 【F1.7 large aperture, support AF and MF】With an F1.7 large aperture, easy to blur the background. Support full-time manual focus, free to switch focus mode. The closet focusing distance is about 0.30m, and the maximum magnification is about 0.15 times..
  • 【High precision STM stepper motor】This 42.5mm F1.7M II lens equipped with high speed and high precision STM stepper motor. Cooperate with brand new control circuit, achieve fast, quiet and precise focus..
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Kingslim DL12 Pro 4K Mirror Dash Cam, 12\ Front and Rear View Camera for Cars with Dual Sony Sensor, GPS, Super Night Vision, Backup Camera and Parking Assistant

  • ...eed on each drive, making it reliable evidence in case of accidents. External GPS module, you can also turn off gps function if you need..
  • Super Night Vision with Dual Sony Sensor: This 4K mirror dash cam features premium dual Sony sensors in the front and rear cameras for sharp night time video quality. f/1.8 large aperture and WDR technology, help to record a crystal clear and visible video in any situation- day or night..
  • Rear Mirror and Safer Parking Assistant: No more concern on installing the rear camera upside down. Rear Mirror function allow to adjust the rear image vertically or horizontally. Also, the upgraded the parking assistant has high middle low 3 parking angle options which allow to default set the most useful parking angle according to your need..
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Mini Wildlife Camera 16MP 1080p Waterproof IP56 Hunting Camera with 2 Inch LCD Screen Night Vision Small Trail Camera with 120° Wide Angle Lens for Observation and Home Security

  • 【2.5K Full HD Resolution】Adopted a high-performance processor, this HD reverse mirror camera upgraded the resolution up to front 2.5k and rear....
  • 【Unprecedented Front and Rear Visual Experience both Day and Night】The front and rear lens adopt F/1.55 & F/1.8 large aperture, supports....
  • 【Real Sony Backup Camera】The 1080P rear cam adopts a real Sony Stavis sensor, records super clear video behind the car even in rainy and foggy....
  • 【Intelligent Functions】The car dash cam uses 12-inch large high-definition display and brand new and unique user-friendly GUI interactive design.....
  • 【24H Customer Service】(The original accessories provided in the package must be used!)WOLFBOX regards product quality and customer satisfaction as....
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REDTIGER Rear View Mirror Camera 11'' UHD 4K Front and 1080P Rear View Mirror Dual Cameras for Cars,GPS,Parking Monitor,Night Vision,Smart Reverse Parking Assistance,Touchscreen,Free 32 GB Card

  • ...0° and rear 150°wide-angle lens dual camera ensure to reduce blind area and providing sufficient evidence for rear-end collisions or collisions etc..
  • SUPER NIGHT VISION - The rearview mirror backup camera improves low light sensitivity allowing clear imaging in low light environments. The combination of F1.5 large aperture and 6-glass lens, professional WDR, HDR technology ensures the clarity of images at night..
  • BIG SCREEN & PARKING ASSISTANCE - The 11" Streaming Media touch screen provides wider view than traditional rear view mirror, allows for easy operation.When reversing, The rearview car camera automatically switches to the reversing image with an adjustable reversing aid line,you can adjust the parking line manully to easier parking.The rear camera also supports the rear view 180°flip , so you can install the rear camera upside down, making it easier to install on pickup trucks and RVs..
  • MIRROR CAM WITH GPS AND SPEED - The included GPS module helps record the location,live speed (MPH/KMH), direction while driving,and replay the saved video through a dedicated GPS player, providing more detailed and reliable evidence in case of accidents..
  • MULTI SMART FUNCTIONS - Loop recording will overwrite the earliest unlocked/locked footage when the SD car....
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Sigma 17-70mm F2.8-4 Contemporary DC Macro OS HSM Lens for Nikon

  • Compatible with APS-C format DSLRs. Compatible with Sigma's USB Dock.
  • A large-aperture, standard zoom lens for digital cameras with an open-aperture value of F2.8 (at 17mm) and covers the most frequently used focal lengths.
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Bike Mirrors for Handlebars 2PCS Adjustable Rear View Mirror for Bikes Universal Rearview Mirror for Road/Mountain/Kids/Ebike Bicycle Adult Bikes

  • 【360° ADJUSTABLE BUCKLE】The bike mirror could rotate 360 degree so you could adjust the bike mirrors to a position most suitable for you, which....
  • 【HD CONVEX BICYCLE MIRROR】The vision of this upgraded HD convex bike mirrors is clearer and broader than traditional plane mirror. This point....
  • 【ONE-PIECE MOLDING & REINFORCE PC BRACKET】The premium quality material of this bicycle rear view mirrors is more stiffen and not easy to fragile....
  • 【SUITABLE FOR ROAD/MOUNTAIN BIKE】This bicycle mirrors is compatible with mountain bikes, MTBs, BMX, commuters and kids bikes, off-road vehicles,....
  • 【WARM WARNING】The bike mirrors comes with a protective film, please remove it before using! In addition, the suitable handlebars inner aperture is....
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Backup Camera 10 inch Mirror Dash Cam Dual Lens Front Rear Dash Camera 1080P Full Touch Screen Video Streaming Rear View Mirror Loop Recording, Parking Monitor, Night Vision, Waterproof Rear Camera

  • ...t possible to clearly read the license plates of vehicles behind or in front of you, both day and night. Both cameras simultaneously record the road ahead of you and behind you, assuring your safety in the event of an accident or insurance claim..
  • 【SUPERIOR NIGHT VISION】Both the front and rear cameras adopt F2.0 aperture and high dynamic range(HDR). The former lets more light come in, the latter adjusts the imaging. You can get clearer footage and image than other dashcams at night. Car license plate number can be easily seen even in low light..
  • 【LOOPING RECORDING & G-SENSOR】The integrated G-sensor will auto-lock recorded video for safekeeping when detecting collision, which makes the video can't be overwritten even Loop Record function is on. When the storage space is full, it can automatically cover the earlier segment. With Loop Recording enabled, you never have to worry about the capacity of our SD card is full (NOT Including SD card)..
  • 【EASY INSTALLATION AND OPERATION】Simply fits over your existing rear view mirror and install the cable inside the cabin of the car and plug into the cigarette lighter. Package including: ① Streaming media mirror dash cam ②Car charger ③Card reader(Not including SD card) ④Crowbar ⑤Buckle Fastener ....
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