Best Adjustable Focal Length

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....

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.

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..

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..

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.

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.

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.

...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..

...BSI CMOS Sensor ,EXPEED Image Processor ,ISO 100-6400 , 2.36m-Dot OLED EVF , 3.2 inch 921k-Dot Vari-Angle LCD Monitor ,4K UHD Video Recording , SnapBridge via Wi-Fi or Bluetooth ,Auto, Aperture, Shutter & Manual Mode.
16MP backside illuminated CMOS sensor, features a built-in NIKKOR lens with a 35mm equivalent focal length range of 24-3000mm. You can zoom even further with 250x Dynamic Fine digital zoom, which will give you an equivalent focal length of 6000mm. Coupled with these extreme focal lengths is Nikon's Dual Detect Optical Vibration Reduction, which provides 5 stops of optical image stabilization and ensures your telephoto shots are crisp..
125x Optical Zoom with Dual Detect Optical Vibration Reduction An absurd 24-3000mm (35mm equivalent) focal range means few, if any, objects are out of the reach of your lens. Zoom is further enhanced by Dynamic Fine digital zoom, which makes the maximum focal length a ridiculous 6000mm. Dual Detect Optical Vibration Reduction provides 5 stops of optical image stabilization so your handheld shots are crisp..
The P1000 features a slew of shooting modes that adjust settings for different scenarios like sunsets, fireworks, and portraits. The popular Moon Mode is great for shooting Earth's closest neighbor and th....