Top Precise Focal Length Reviews

MFT Lens Adapter EF-M2II Auto-Focus Speed-Booster Control Ring for Canon EF Lens to M4/3 Camera GH4 GH5 GF8 GF9 GX8 GX85 E-M5 E-M10 E-M10II E-PL5 Pen-F

Compatibility: EF-M2 II electronic lens converter allows Canon EF series lenses to be used on micro four thirds (mft) cameras, such as G6 G7 GH3 GF6 GF7 GX7 E-M5II E-PL7 E-PL8 E-PM2 E-P3 E-P5..
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 stop aperture..
Function: auto focus (AF), EXIF signal transmission, increase the lens 1 f-stop and the amount of light into the virtual background, help to better highlight the theme.
adjust the aperture directly via camera to control actual aperture of lens..
Material & Design: bayonets are made of high quality metal with surface plating treatment, being durable and robust.
optical glasses built in 4 groups / 5 glasses.
with 1/4" thread tripod foot at the bottom.
firmware can be upgraded via a micro USB port etc..
Performance: smooth operating and quick focusing.
use gold-plated PIN needle to transmit signal, greatly enhancing its transmission performance.
inbuilt copper electronic contacts and IS function, making focus precise and clear..

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Fujinon XF16mmF2.8 R WR Lens - Silver

High resolution performance: edge-to-edge sharpness from the center to the corners of the frame is achieved by the precise arrangement of 10 lens elements in 8 groups. This lens also includes two aspherical elements, which serve to suppress the image degrading effects of chromatic aberration and field curvature imperfection..
Compact, lightweight and Stylish design: weighing in at 5. 47oz (155G) and measuring just 1. 79in (45. 4mm) in length, This lens offers up the renowned image quality and refined style associated with the Fujinon XF family of lenses. With its metal exterior, precise click Stops, and smooth dampening, this lens offers incredible image quality in a durable aesthetically pleasing appearance..
Fast and quiet autofocus: the inner focusing AF system uses a stepping motor to move focusing elements into place through precise electrical pulses, in order to achieve fast and near-silent autofocus performance..
Weather and dust resistant durability: The lens is designed to operate in temperatures as low as 14° Fahrenheit and is Sealed at nine points around the barrel, making it both weather and dust resistant..

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Samyang 24 mm F3.5 Tilt Shift Lens for Sony

Focal length equivalent when using lens on APS-C format camera is 38.4mm.
Tilt/Shift functions allow for precise perspective and depth of field control.
Aspherical and low-dispersion lens elements minimise aberrations for sharp resolution and accurate colours.
UMC coating on lens elements provides even light transmission and minimises reflections, flare and ghosting.

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Focal Chora 816 2.5-Way Bass Reflex Floorstanding Speakers, Black (Pair) with Center Speaker Sub 600p 600 Watt Subwoofer

Bundle includes: Pair of Focal Chora 816 2.5-way bass reflex floorstanding loudspeaker, Black, Focal Sub 600P Black 600 Watt Closed Subwoofer, and Focal Chora Center 2-Way Sealed Center Loudspeaker, Black.
FCHORA816BK - New speaker drivers with exclusive Slatefiber cone, developed and manufactured in France by Focal.
FCHORA816BK - 6-1/2” (16.5cm) Slatefiber midbass Dynamic and precise.
JMLSUB600PBL - Closed subwoofer for faithful reproduction of bass frequencies.
FCHORACCBK - Center speaker for a complete Home Cinema system.

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Donegan OptiVISOR LX Binocular Magnifier-Lensplate #4 Magnifies 2X At 10 Focal Length

Please note: number on the lens designates the diopter, not the magnification.
Matched set of Lenses prismatically ground and polished to precise optical standards.
Lens conveniently flips up and away when not in use.
Ergometric soft genuine leather headband backed with wool felt designed from natural material to help wick moisture away.

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Astromania 60mm Compact Deluxe Finder & Guidescope Kit with 1.25' Double Helical Focuser - Guiding with The Mini-Guide Scope: So Astrophotography is Easier and Less Equipment

...eniently be stashed in an accessory case between uses. "Dovetail guide scope bracket installs on virtually any astrophotography telescope quickly and easily..
The sturdy metal housing made of black anodized aluminum. Looking out not only solid, but is also very robust. A milled and knurled ring allows easy and precise fine focus adjustments. It comes with matching pipe clamps and a Synta-style mounting plate to make assembly and installation as easy as possible..
Have a built-in worm-focuser with Brass Compression Ring and 2 thumbscrews,45mm focusing range (10mm focusing range with micro-focusing Helical focuser, the rest is by a fixable, scaled drawtube) is made possible by an extremely precise focus adjustment. The mechanism has a determined orientation: This is mounted cameras or eyepieces - and thus also the area with your guide stars - not rotate during focusing..

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Orion 13022 Deluxe Mini 50mm Guide Scope with Helical Focuser

Compact Deluxe Mini Guide Scope with a built-in helical focuser for precise focusing of guide stars.
Designed for use with the Orion StarShoot AutoGuider (sold separately), and astrophotography telescopes up to 1500mm focal length.
Non-rotating camera collar will not cause the attached autoguider to rotate during focus adjustments, ensuring the field of potential guide stars will....
Adjustable-aim dovetail guide scope bracket installs on virtually any astrophotography telescope quickly and easily.

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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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Sony 18-135mm F3.5-5.6 OSS APS-C E-Mount Zoom Lens

7.5x high magnification zoom/ 27-202.5mm (35mm equiv.) focal length. Lens Groups / Elements : 12-16.
Outstanding sharpness from 1x aspherical and 2x ED glass elements.
7-blade circular aperture contributes to beautiful bokeh. Hood Type:Petal shape, bayonet type. Minimum focus distance- 0.45 m (1.48 feet).
Optical SteadyShot image stabilization for sharper stills and video.
Fast, precise, quiet AF for high-speed stills and impressive video.

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SmallRig Seamless Focus Gear Ring (66mm to 68mm) - 3292

【STANDARD 0.8 MOD】SmallRig Seamless Focus Gear Ring 3292 is designed to fit lenses for precise and stable focal length adjustment. It features standard 0.8 MOD and allows you to add 0.8 MOD gears to a compatible lens for use with cine follow focuses..
【FITS LENS PERFECTLY】Moderate stiffness, SmallRig Φ66-Φ68 Seamless Focus Gear Ring 3292 fits lens perfectly. This 66mm to 68mm size fits virtually all lenses of the same outer diameter..
【SUPPORT 360° ROTATION】It makes less noise and no distortion, allowing 360º smooth rotation and precise focus adjustment..
【SEAMLESS SWITCHING】The ring is made by elastic material, suits lens seamlessly and evenly. (Please Note: Gear slippage or jam may occur when mounted onto lenses larger than Φ66-Φ68mm across.).
【RELATED ACCESSORIES】The ring 3292 can work with SmallRig Mini Follow Focus 3010 and other follow focus systems, such as Seamless Focus Gear Ring 62.5 to 64.5mm 3291, 72 to 74mm 3293, 75 to 77mm 3294, 78 to 80mm 3295, 81 to 83mm 3296..

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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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