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Best Adjustable Focal Length

SmallRig Mini Follow Focus with A/B Stops & 15mm Rod Clamp and Snap-on Gear Ring Belt for DLSRs and Mirrorless Cameras Fits Different Diameter Lenses Up to 114mm - 3010

  • ...SmallRig Mini Follow Focus 3010 is designed for easy and quick focus control in video shooting. It is basically compatible with the most cameras on the market like DLSRs & Mirrorless Cameras. In addition, it features a super lightweight design with only 195g, compact and portable, easy for carrying outside..
  • 【ADJUSTABLE A/B STOPS】The A/B hard stops of the follow focus are adjustable, you can adjust the suitable A/B focal length according to your shooting needs. Moreover, by turning on/off the AB stops lock, you can realize the easily switch of focal length between 360° unlimited zoom and A/B focal length..
  • 【ANTI-SLIP & ANTI-SWEAT DESIGN】The Mini Follow Focus 3010 imitates sports car hub, adopts anti-slip and anti-sweat design, and its excellent damping feeling and ergonomic design helps to control the focal length you need more accurately and comfortable, thus realizing a better shooting..
  • 【MODULAR DESIGN】SmallRig Follow Focus 3010 adopts modular design that allows for assembling and disassembling on the left and upper sides of the camera rapidly and easily. Besides, the included 15mm Rod 1050 and Rod Clamp (with NATO rail) 3011 allows for attaching other SmallRig accessories such as NATO Side Handle 2187, Super Clamp Mount 1124 to....
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GuDoQi Magnifying Glasses with Light for Close Work 4 Interchangeable Lens 10X 15X 20X 25X Jewelers Loupe Hands Free Reading Magnifying Glass for Watch Repair

  • Single Eye Observation: Considering its character of area observation, it is suggested to observe with one eye. It can't focus when you use two eyes....
  • Focal Length: The higher magnification is, the shorter focal length will be. Adjust focal length from 0.2 to 1.8 inch (0.5-4.6cm) by changing....
  • Replaceable Lens: 4 Pairs of lens with different magnifications (10X, 15X, 20X, 25X) are included. For a larger grand review please refer to lower....
  • Humanized Design: With adjustable LED light, it can help you work in the low-light. Detachable bracket and headband ensure tight wearing and reduce....
  • Wide Using and Note: It can be used in mechanical processing, electronic repair, jewelry appraisal, timepieces repair and miniature engraving etc,not....
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Jewelry Loupes,Magnifying Glass Jewelers Loupe 10X 20X LED Headband Magnifier Illuminated Eye Loupe Watch Repair Tool Kit Head Mounted Magnifying Glass Coin Stamp Currency Book Errors Magnifier Glass

  • Left right double eye patches magnifierloupe with adjustable LED to help work in low-light conditions.Set of 2 magnifying glasses mounted on a....
  • Handsfree eyeglasses, bracket and headband are interchangeable to ensure more comfortable and tight wearing.Comfortable eyeglass frame or switch to....
  • Focal Length: The higher magnification is, the shorter focal length will be. Adjust focal length from 0.2 to 10.2 inch (0.5-25.9cm) by changing....
  • Mechanical processing, electronic repair, jewelry appraisal, timepieces repair and miniature engraving etc. Included 10x 20x Lens ,★★★ Too high....
  • HOBBIES- These are super handy for a whole range of applications and hobbies where fine detail and closer inspection is required. Use for jewellery....
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SVBONY SV215 Zoom Eyepiece, 1.25 Inch 3mm to 8mm Eyepiece with Parfocal Design, Telescope Accessory for High Power Lunar and Planetary Observing

  • SV215 zoom eyepiece is a good assistant for you to observe and take pictures of the planets.
  • it is a good helper for the amateur astronomers to observe Venus.
  • SV215 3 mm to 8mm zoom eyepiece equivalent to multiple eyepieces.
  • SV215 eyepiece is much better than the kit eyepieces.
  • this helps you to zoom in and out rather than changing lens.
  • you do not need to refocus every time you change the focal length.
  • the apparent field of view and the usable eye relief to stay the same as the focal length changes.
  • there are clicks and stops as you pass through the marked zoom levels.
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Lens Mount Adapter EF-EOS M2 Auto-Focus 0.71x Speed-Booster Control Ring for Canon EF Lens to Canon EOS-M (EF-M Mount) Mirrorless Cameras M M2 M3 M5 M6 M10 M50 M100

  • Compatibility: EF-EOS M2 lens converter allow Canon EF mount series lenses to work with Canon EF-M mirrorless cameras M M2 M3 M5 M6 M10 M50 M100.
  • 0.71x Focal Reducer : Focal length is multiplied by 0.71 based on the original ( equivalent focal length = focal length x 0.71 ), which helps enlarge 1 level aperture.
  • Strong Functions: auto focusing function, increasing the lens 1 f-stop and the amount of light into the virtual background, better highlight the theme.
  • Wonderful Performance: use PIN gold needle to transmit signal, greatly enhancing its transmission performance.
  • optical glasses built in 4 groups / 4 glasses.
  • enjoy EXIF signal transmission, AF(auto-focus) and adjustable aperture, etc..
  • Equipped with USB interface, convenient for software upgrade.
  • achieve perfect new functions of the lens mount adapter and fix bugs according to follow-up upgrades.
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ALZO Smoothy Zoom Focus Assist - works like follow focus - adapts to many different camera lens

  • ...GN】SmallRig Mini Follow Focus 3010 is designed for easy and quick focus control in video shooting. It is basically compatible with the most cameras on the market like DLSRs & Mirrorless Cameras. In addition, it features a super lightweight design with only 195g, compact and portable, easy for carrying outside..
  • 【ADJUSTABLE A/B STOPS】The A/B hard stops of the follow focus are adjustable, you can adjust the suitable A/B focal length according to your shooting needs. Moreover, by turning on/off the AB stops lock, you can realize the easily switch of focal length between 360° unlimited zoom and A/B focal length..
  • 【MODULAR DESIGN】SmallRig Follow Focus 3010 adopts modular design that allows for assembling and disassembling on the left and upper sides of the camera rapidly and easily. Besides, the included 15mm Rod 1050 and Rod Clamp (with NATO rail) 3011 allows for attaching other SmallRig accessories to improve the compactness of your equipment..
  • 【MODULAR DESIGN】SmallRig Follow Focus 3010 adopts modular design that allows for assembling and disassembling on the left and upper sides of the camera rapidly and easily. Besides, the included 15mm Rod 1050 and Rod Clamp (with NATO rail) 3011 allows for attaching other SmallRig accessories such as N....
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Orion SpaceProbe II 76mm Equatorial Reflector Telescope

  • A great beginner's reflector telescope for all-around astronomical observing at a great price!.
  • 3" (76mm) aperture and 700mm focal length provides wonderful views of the Moon, planets, and even some bright nebulas and star clusters.
  • Includes sturdy adjustable aluminum tripod and EQ-1B equatorial mount for easy manual slow-motion tracking of celestial objects with included slow-motion controls.
  • Includes two coated 1.25" telescope eyepieces - 25mm and 10mm focal lengths for viewing at 28x and 70x magnification respectively.
  • Also includes red-dot finder, 1.25" focuser, MoonMap 260, and more.
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VILTROX EF-M2II Focal Reducer Booster Adapter Auto-Focus 0.71x for Canon EF Mount Series Lens to M43 Camera GH4 GH5 GF6 GF1 GX1 GX7 E-M5 E-M10 E-M10II E-PL5

  • Compatibility: Viltrox EF-M2 II is an upgrade version of EF-M2, allowing Canon EF series lenses to be used on M4/3 cameras, such as GH4 GH5 GF6 GF1 GX1 GX7 GX85 E-M5 E-M10 E-M10II E-PL5.
  • 0.71x Focal Reducer Converter: focal length is multiplied by 0.71 based on the original (equivalent focal length = focal length x 0.71), which helps enlarge 1 stop aperture.
  • AF Functions & Adjustable Aperture: auto focusing function, increasing the lens 1 f-stop and the amount of light into the virtual background, better highlight the theme.
  • adjust the aperture directly from camera to control the lens’ actual aperture.
  • Material & Design: bayonets are made of metal with surface plating treatment, being durable and sturdy.
  • inbuilt copper electronic contacts and IS function, making focus precise and clear, with 1/4″ thread tripod foot at the bottom, etc.
  • USB Firmware Upgrade: Equipped with USB interface, can realize software upgrade. Can perfect new functions of the lens mount adapter and fix bugs according to follow-up upgrades..
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Handheld Magnifier with Light, Mini Pocket Microscope, Pocket Microscope 100X 1 Microscope, for Without Scale

  • A 100x magnification effect brings you: Use a 100x zoom microscope magnifier to magnify an object to 100 times its original size. Lets you dive into the leaves, freckles, insects and logos on your jewelry..
  • Adjustable focal length: The focal length of the micro-fiber magnifying glass can be adjusted by itself to observe objects more clearly and facilitate daily use. Improve work efficiency..
  • Lighting effects: Not only can we zoom in, the lights of the magnifying glass provide enough light to illuminate the item you want to check in low light conditions..
  • Portable design: small bag storage, very safe in artificial leather pouch, not easy to damage. Portable handheld magnifier suitable for home, office, laboratory or jewelry store..
  • Scope: Industrial use, circuit boards and printing, industry, medicine, gardening, coins, stamps, jewelry, assessment, education, geography, home and office..
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Canon 28mm f/3.5 FD-Mount Manual Focus Lens

  • Focal length and maximum aperture: 35mm 1:2.
  • Lens construction: 10 elements in 8 groups.
  • Rear focusing system with USM focus adjustment.
  • Closest focusing distance: 0.24m/0.79 ft,Focal Length : 35mm Comparable APS-C 1.6x Focal Length: 56 mm.Lens Construction:10 elements in 8 groups.
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Canon EF 35mm f/2 IS USM Wide-Angle Lens

  • Focal length and maximum aperture: 35mm 1:2.
  • Lens construction: 10 elements in 8 groups.
  • Rear focusing system with USM focus adjustment.
  • Closest focusing distance: 0.24m/0.79 ft,Focal Length : 35mm Comparable APS-C 1.6x Focal Length: 56 mm.Lens Construction:10 elements in 8 groups.
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Sigma 50mm F1.4 Art DG HSM Lens for Nikon

  • 75mm equivalent focal length on APS-C cameras, 80mm equivalent focal length on Canon APS-C cameras.
  • Ring-type ultrasonic-type AF motor with full-time manual focusing.
  • 77mm filters. 77mm filters. 0.4m/15.7" minimum focus. Please use a USB dock for calibrating the focus.
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Astromania 1.25\ Extendable Camera Adapter - for Either Prime-Focus Or Eyepiece-Projection Astrophotography with Refractors or Reflector Telescopes - Threaded for Standard 1.25inch Astronomy Filters

  • ...ction adapter for 1.25-inch eyepieces of up to 38mm outside diameter, also can be used as a focal adapter with a T2 thread..
  • Two adapters in one: The projection and focal adapter consists of two parts - the projection part and the focal adapter. The projection part is used with an eyepiece for achieving a long focal length with small objects, e.g. for individual craters. Use the focal adapter without the use of an eyepiece so employing the focal length of your telescope - for taking photos of the entire Moon, gas nebula or galaxy..
  • Zooming into the night sky: Use the sliding rear part of the adapter to zoom - pull out to magnify the image - without needing to change your eyepiece. Connect this adapter to each telescope with a 1.25" eyepiece connection. You can use an eyepiece of any focal length - and you can achieve high-magnification images of lunar craters and planets. All you need is a T2 ring (Not Include) and a suitable camera with a bayonet connector..
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