Best Fixed Aperture

Tamron 70-210mm F/4 Di VC USD for Nikon FX Digital SLR Camera 6 Year Tamron Limited USA Warranty

  • Compact, Lightweight Fixed 50 millimeter Focal Length Lens..
  • Large F, 1.8 Aperture for Low-Light Photography and Creative Background Blur.
  • A Stepping Motor (Gear-Type STM) Provides Smooth and Quiet Continuous AF During Video Recording, As Well As When Shooting Photos.
  • Optimized Lens Placement and Coatings Help Deliver Outstanding Color Balance, While Minimizing Ghosting and Flare.
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LYL LEYOULAND Fish Tank Divider Clear 20/25/29/30/40 Gallon Aquarium Divider with Suction Cups Accessories…

  • Fish tank separator size: 15.75" * 11.8"*0.12" (40cm*30cm*3mm)*2 piece, aperture : 0.2" (5mm).
  • using laser cutting, the circumference and the hole are smooth, the aperture is well-designed to secure the safety of your fish..
  • Product material: Eco-friendly, non-toxic, high hardness, corrosion resistance, easy to clean.
  • high transparent acrylic (PMMA), the light transmittance is more than 92%, does not affect the aquarium landscaping and looking, and will make the fish tank more beautiful under the light..
  • New design: The state of the art design with long holes around, can be placed horizontally and vertically, which is Conducive to fish feces through and more convenient for stitching. Additional accessories allow you to easily assemble more than two dividers to fit more fish tank sizes.
  • It can be reused, whether you are a 20-gallon fish tank, a 25-gallon fish tank, a 29-gallon fish tank, or a 40-gallon fish tank(long) (Please measure your tank before purchasing! via multiple fish tank dividers)..
  • Complete accessories: Including transparent suction cups*16, fixing clip*16, transparent screw*12, Splicing fixed plate*4, screwdriver*1.
  • easy to install, no need to purchase additional accessories, and provide more for spares..
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Microscope Accessories Kit Focusable 0.37X 0.5X 0.7X Microscope Camera Eyepiece Adaptor Microscope Slides (Color : 0.37X)

  • Through microscope or telescope or eyepieces tube Adjustable (Focusable) or fixed lens inside..
  • Different reduction lenses for different sensor size.
  • Parfocal with different microscope and telescope objective lenses Diffraction limited performance. Aperture totally coupled with your microscope or telescope's exit pupil..
  • Professional and practical design with beautiful appearance, easy to carry and use..
  • Usually used in laboratories, schools, teachers, sample observation, eyepiece protection, etc..
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ADC Ophthalmoscope, Pocket Size, LED Lamp, 2.5V, Hard Case, Diagnostix 5112NL

  • 5 aperture selections (small spot, large spot, semicircle, fixed and red-free filter). 19 viewing lenses from -20 to +20 diopters for better resolution. Illuminated magnified lens dial. Rubber brow rest.
  • Ophthalmoscope in hard case measures 7 1/4” x 4 1/2” x 1 1/2”, weighs.82 lbs.
  • "AA" battery handle (batteries included) with on/off power switch integrated into pocket clip.
  • 2.5v Ad LED lamp for true tissue color. Ophthalmoscope meets or exceeds ISO 10942, ISO 15004-1, and ISO 15004-2.
  • This product is intended for sale to and for use by Medical Professionals/Educators and students who are under the training or supervision of Medical Professional/Educators.
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Rokinon 12mm F2.0 NCS CS Ultra Wide Angle Lens Sony E-Mount NEX Black RK12M-E

  • Sagittal lines (thick lines) represent the contrast.
  • This lens is compatible with all APS-C Sony E Mount interchangeable lens cameras.
  • Nano Crystal Coating System (NCS) for increased light transmission and reduced internal reflections.
  • Aperture range f2.0-22, Ultra Wide 12mm Fixed Focal Length, minimum focusing distance of 7.9 inches.
  • Optimized for excellent optical quality and true ultra-wide 110 degree edge to edge coverage with APS-C sensor digital cameras.
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DOBE Camera Lens Protective Cover Shell Cap Sensor Mount Clip Holder for PS4 PS VR New Camera

  • Compact, Lightweight Fixed 50 millimeter Focal Length Lens..
  • Large F, 1.8 Aperture for Low-Light Photography and Creative Background Blur.
  • A Stepping Motor (Gear-Type STM) Provides Smooth and Quiet Continuous AF During Video Recording, As Well As When Shooting Photos.
  • Optimized Lens Placement and Coatings Help Deliver Outstanding Color Balance, While Minimizing Ghosting and Flare.
  • Lens Compatible with the Mirrorless R System (EOS RP, EOS R, EOS R5, or EOS R6).
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DEVMO Compatible with DIY Lightnes Classic Retro Holga Lomo Recesky TLR Camera 35mm Film Twin Lens Reflex Kit

  • Picture size: 62 x 46 millimeter and shutter speed 1 per 60 seconds (fixed), the flash always fire.
  • New Macro Lens adapter for close ups 35 centimeter to 50 centimeter.
  • The camera signals the recommended aperture setting with a flashing LED.
  • This helps capture the perfect photo every time.
  • Effective flash range: 0.6 meter 2.7 meter.
  • High Key mode takes brighter pictures with a soft look perfect for portraits.
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Rokinon 12mm F2.0 NCS CS Ultra Wide Angle Lens Sony E-Mount NEX Black RK12M-E Renewed

  • Sagittal lines (thick lines) represent the contrast.
  • This lens is compatible with all APS-C Sony E Mount interchangeable lens cameras.
  • Nano Crystal Coating System (NCS) for increased light transmission and reduced internal reflections.
  • Aperture range f2.0-22, Ultra Wide 12mm Fixed Focal Length, minimum focusing distance of 7.9 inches.
  • Optimized for excellent optical quality and true ultra-wide 110 degree edge to edge coverage with APS-C sensor digital cameras.
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2008 Learn the (Canon XH A1, XH-A1) XHA1, XHA1s TUTORIAL TEACHING PROGRAMMED-INSTRUCTION DVD

  • Compact, Lightweight Fixed 50 millimeter Focal Length Lens..
  • Large F, 1.8 Aperture for Low-Light Photography and Creative Background Blur.
  • A Stepping Motor (Gear-Type STM) Provides Smooth and Quiet Continuous AF During Video Recording, As Well As When Shooting Photos.
  • Optimized Lens Placement and Coatings Help Deliver Outstanding Color Balance, While Minimizing Ghosting and Flare.
  • Lens Compatible with the Mirrorless R System (EOS RP, EOS R, EOS R5, or EOS R6).
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Specialty Archery Verifier 1/4 in. No. 8

  • Specialty Archery - PXL Hunter Peep Aperture- 1/4. The most advanced peep system in the archery industry, completely designed for ultimate accuracy..
  • CST – Center String Technology – PXL Capture Aperture located on center of bowstring – no L and R misses. OCT – Optical Centered Technology – Improved centration of lenses for ultimate accuracy. PLT – Protected Lens Technology – Lenses protected by plastic on 2 sides prevents cracking..
  • DSAT – Dual String Angle technology – has both 37 and 45-degree string angles on the same peep housing. TAP – Tool-less Aperture Technology – Knurled Tool-less PXL Capture Aperture – eliminates the need for an aperture wrench..
  • NOTE: PXL Hunter Peep Apertures, PXL Hunter Peep Clarifiers, and PXL Hunter Peep Verifiers fit into Specialty Archery PXL Hunter Peep ONLY. NOT compatible with other Specialty Archery peeps..
  • PXL Hunter Peep and component weights: PXL Hunter Peep – 30.5 grains. PXL Hunter Peep Capture Aperture – 7.5 grains. PXL Hunter Peep Clarifiers/Verifiers – 3.5 grains. PXL Hunter Peep Shade Cap – 3.0 grains..
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