12 best tripod tops

• 【Upgraded Design】: The ball head of SmallRig Mini Tripod is finely laser-engraved in 5° increments from -0°-330° for tracking progressive panning, 3 position leg angle adjustment system provides flexible shooting, ideal for multi-shot panoramic photography. PLEASE NOTE we do not recommend you to adjust the screws of the leg. It can only stand in place when the leg in 130°. If you want the tripod legs angle notches/locks, please turn to BUT2666(B0833XY83V)
• 【Arca-Swiss QR Plate】: The mini tripod comes with an Arca-Swiss compatible clamp and plate for quick release and mount. With rubber-padded mount QR plate to protect your camera from potential scratches
• 【High Stability】: Made of aluminum alloy, The legs support up to 44 lbs and the ball head bears up to 4.4 lbs while weighing only 0.89 lbs. The rubber tripod feet prevent the mini tripod from sliding and protect delicate surfaces, which rival traditional spikes to stabilize the tripod on soft terrain
• 【360 Degree Swivel Tripod Head】: Ensure 360 degree horizontal rotating and from -90 to +45 degrees tilting for panoramic photography when adjusting the angle
• 【Solid Base Support】: The rubber feet prevent the mini tripod from sliding and protect delicate surfaces, which rival traditional spikes to stabilize the tripod on soft terrain

User questions & answers

Question:	Is the quick release plate compatible with arca swiss plates? will it mount directly to my small rig canon m50 cage
Answer:	The clamp is compatible with some, but not all, Arca Swiss plates. No fault of SmallRig, but various manufacturer plates are not machined to the same tolerances. To their credit, the SmallRig seems to be best-of-class. For instance, the clamp will secure both Really Right Stuff and Kessler Kwik Plates, both superb products. I also like Joby brand X-ball, which claims to be Arca Swiss compatible, but Joby plates cannot be secured in the SmallRig clamp, though I believe the Joby clamp on X-ball will secure the SmallRig plate included on this tripod. FWIW - lever-action clamps seem to require a lot more precision than screw-lock clamps like this one. So a Really Right Stuff Arca Swiss screw lock clamp may secure a Joby plate, but a Really Right Stuff lever-lock clamp will not work with the same plate. I'm a big fan of Really Right Stuff purpose-built Arca Swiss camera plates, which are specific to each model of camera. I buy one for every camera I purchase and never remove it since they form fit the camera body, do not twist or loosen, and do not protrude or snag inside the camera bag. This little SmallRig tripod works great with Really Right Stuff Arca Swiss Plates, and by extension, also Kessler which is always designed and built to a high standard. Other makes of plates, your milage may vary because with Arca Swiss, tiny tolerances seem to make all the difference, and what should work does not always clamp securely.
Question:	which is the maximum load
Answer:	Hello, Thanks for your question to the SmallRig Mini Tripod with 360 Degree Ball Head and QR Plate. The maximum load is 5KG / 11lb (more than 10kg when Ball Head exclued） Hope my answer would help. SmallRig Sales Team
Question:	Is the tabletop tripod compatible with a gopro hero 5 black
Answer:	As long as your GoPro has a tripod adapter it will work .The tripod uses standard 1/4-20 thread, so the camera should just screw right on.
Question:	How many positions can you adjust the legs to
Answer:	They don’t lock at all so essentially you have all the way open or closed and even if all the way open - it still isn’t locked. If you have an especially sticky surface that can grip the feet maybe you can open it less but it’s not like a large tripod with multiple locking positions - there is no legs out / flat option. They stop at about 30° (ever so slightly more open than the picture). Hope that helps. The non locking legs was a big issue for me and is my only really complaint about this tripod.

Product features

For Smartphones

Phone adapter is not included in the package.

For DSLR cameras

Compatible with any DSLR camera even with lens attached.

For Projectors

Compatible with projectors with 1/4'' thread hole.

For GoPro

GoPro adapter is not included in the package.

Product description

DINVEL Tabletop tripod is solid, small and portable, great for travel, hiking and on the go. Specifications

Brand: DINVEL

Color: Black

Model: DT-01

Folded length: 220mm

Materials: Aluminum alloy

Load Capacity: 6.6lbs / 3kg

Tripod Weight : 0.53lbs / 0.242kg

Platform Weight : 0.36lbs / 0.163kg



Features

. Super Machining aluminum alloy, small portable size and lightweight.

. Quick-release mounting plate ensures fast transaction between shots.

. Portable carry bag allows you carry this tripod all around with convenience.

. 30mm panoramic swivel ball head makes it easy to take panorama pictures.

. Compatible with Cameras and Electronic Devices using the standard 1/4"-20 mounting screw.

. 16mm width non-slip square feet design to keep the tripod steady to ensure optimal performance.

. The mini tripod is designed with two angle adjustment which enables you to change the angle of the feet easily.

. With the octopus catching strips, allows you to attach the tripod anywhere arbitrarily to capture different angles on your trip.

. Compatible for all cameras, camcorders, spotting scopes, and other devices equipped with 1/4 tripod mounts



Package

1 * Mini Tripod

1 * Ball Head

1 * Quick Release Plate

1 * Phone Holder

2 * Small Hex Wrench

3 * Octopus Catching Strips

1 * Carrying Bag



Notes:

Cameras, phones and Phone mount are not included.

Please contact us if you need more help. And you can also contact us by the email printed on the packing box.

• Super Study Mini Tripod- CNC machining aluminum and anodized finish, Comes with 30mm diameter 360°Ball Head and 1/4 Safety Stop Quick Release Plate, Max load up to 55.16lbs.
• Two Angle Adjustment with high quality Metal Wheel Lock, much more stable than most other classic table tripods.
• Compact & Lightweight - Super mini size( folded length of 8.66 ", weighing only 0.53lbs) ), makes it perfect for travel and convenient for taking it anywhere.
• Multi-Functional -Three1/4 thread holes and one slot on each leg of the tripod, to mount with, microphone, LED flash light and on-camera monitor, etc. As well as strap the tripod with 3 included Octopus Catching straps.
• Package Include: 1* DINVEL Tabletop Tripod (Ball head and Quick release plate included), 1* Mini Tripod Cell Phone Holder, 3 * Catching Strips, 1* Tripod Carry Bag, 2 * Hex Wrenches, 1 * User manual.

Product description

T16C20N is one professional easy to carry tripod, made of carbon fiber material ensuring the tripod is light as well as strong enough.

Compact no central column design makes it even smaller while being capable of bearing professional DSLR cameras.

Material: Carbon Fiber, Aluminum

Number of Leg Sections: 2

Height with legs spread: 54-278mm

Height with legs folded: 205mm

Net Weight: 258g.

Load Capacity: 3kgs.

• No central column design making the tripod compact and smaller in size for easycarry.
• Carbon fiber material, 2 leg sections and 3 height levels for different shooting demand.
• Capable of bearing up to 3kgs., compatible with professional DSLR camera lens.
• Standard 1/4" top stud, with 3/8" bushing included, goes with different types of ballheads.
• Compatible with optional extension tube to increase height for shooting.

Product description

Features:

This 2 in 1 mini tripod holder combination is especially designed for phone shooting.

With the help of this product, you can fix your phone and action camera or other device

stably and take photos or videos freely. Small in size, easy to carry and operate, perfect

for taking self-portrait, video diaries, video blogging during traveling, hiking, camping, parties, etc.

Tripod:

360 degree rotation, freely adjust to your ideal degree.

Extendable legs(Max length 200 mm), fits for different shooting height.

Rubber anti-slip foot mats.

High-quality, lightweight, portable and compact.

Material: Aluminum alloy/plastic.

Suitable for: most cell phone, action camera, video camera and mini projector

Phone Holder:

With soft pad equipped between fixing sides, prevent your cell phone from falling off, anti slide.

Standard connect interface for tripod mount, suitable for any tripod mounts and stabilizers.

It is suitable for cell phones width between 55mm and 85mm (2.2"--3.3"). The width can be adjusted freely.

Color: Black.

Suitable for:Fix your for iPhone 6 ,6 Plus5s, 5c, 5, 4s, 4; for Samsung Galaxy S5, S4, S3

Note 3, Note 2, for HTC One, for HTC One Max, for Xiaomi M3, MI3, etc. with screen width less than 3.3".



Package Includes:

1 x Phone tripod

1 x Phone holder

• Tripod+Tablet Holder Total Height: 210mm(min)-300mm(max)
• Tripod+Tablet Holder with standard 1/4 inch screw
• 1x tripod, 1x tablet holder
• Rotatable Desktop Tripod Stand For Digital Camera
• Extendable Legs Range: Suitable for 5 inch - 8 inch(120mm-200mm)

Product description

Zinc Plated Cast Iron Triangular Tripod stand for Bunsen burners, 8.25" Tall , Top wide 5.90" - Threaded legs to adjust level. Each leg has a plastic foot

• 8.25" tall to allow bunsen burners to sit under tripod stand
• Zinc Plated Cast Iron Triangular Tripod
• Threaded legs to adjust level.
• Each leg has a plastic foot
• Triangular top measures 5.9" each side

Product description

Specifications:

Brand: MOZA

Type: Desktop Tripod

Max Load: 6kg/13.2lbs

Material: Aluminum Alloy

Package Size: 20 * 10 * 7cm /  7.9 * 3.9 * 2.8in

Package Weight: 300g / 10.6oz



Packing List:

1 * Tripod

1 * Cleaning Cloth

• Durable aluminum alloy tripod body can be used under high temperature and it is corrosion resistance.
• Wide loading platform for better loading capacity 6kg/13.2lbs, and low angle macro shooting.
• Portable mini table tripod with 1/4inch screw directly mounted on cameras or gimbals.
• Folded size design, portable and easy to carry.
• Offer a long service life.

Product description

NOTE:

The Camera is Not included.

Description:

The tripod is Made of Aluminum Alloy, durable and solid

With the use of a tripod, it can achieve greater performance and maintain image quality for cropping larger picture sizes

Adjustable height 6.7-19.7 inches/ 17-50 centimeters, 5 sections adjustable-height leg tubes, so it is the best choice for macro shooting with smaller size, lighter weight and closer distance

360 degree swivel ball head with bubble level provide you with a panoramic view

Non-slip feet design to keep the tripod steady. Max load weight is 11 lbs/ 5kg for optimal performance

Compatible with many DSLR Camera Video Camcorder, such as Canon, Nikon, Pentax, Panasonic, Sony, Samsung, Olympus and other digital DSLR cameras

Material: Aluminum Alloy

Color: Black+Red

Load Capacity: 11 pounds/ 5 kilograms

Maximum Height: 19.7 inches/ 50 centimeters

Minimum Height: 6.7 inches/ 17 centimeters

Standard Screw: 1/4 inch

Net Weight: 24.7 ounce/ 700 gram

Package Contents:

1x Aluminum Alloy Tripod

• SOLID CONSTRUCTION: The tripod is Made of Aluminum Alloy, durable and solid; With the use of a tripod, it can achieve greater performance and maintain image quality for cropping larger picture sizes
• UPGRADED DESIGN: Adjustable height 6.7-19.7 inches/ 17-50 centimeters, 5 sections adjustable-height leg tubes, so it is the best choice for macro shooting with smaller size, lighter weight and closer distance
• PANORAMIC VIEW: 360 degree swivel ball head with bubble level provide you with a panoramic view; 3 position leg angle adjustment system provides flexible shooting
• NON-SLIP DESING: Non-slip feet design to keep the tripod steady. Max load weight is 11 lbs/ 5kg for optimal performance
• COMPATIBILITY: Compatible with many DSLR Camera Video Camcorder, such as Canon, Nikon, Pentax, Panasonic, Sony, Samsung, Olympus and other digital DSLR cameras

User questions & answers

Question:	Is it easy to carry
Answer:	Yes. Folded up, it's about 6in tall and 3.5in thick. It's a solidly built product and does feel a bit heavy (about 1.5 lbs) for its size.
Question:	Does this tripod head tilt completely horiztontally
Answer:	The head will turn 90 degrees to one side and spin. Very sturdy tripod. I use it with a Nikon D800 and a Sigma 180 macro lens, together about 10 lbs.
Question:	Does it come with phone holder and if it does can it fit iphone 11pro
Answer:	Hello, no there is no phone holder with this tripod. But, it is worth purchasing and you can pick up a holder separately.
Question:	Does the ball head screw off
Answer:	Yes - the base structure in which the ball joint is housed screws off of the center pole.

Product description

Introduction:

It must be very annoying when you want to take a selfie without friends aside,do you? Try this contractive selfie stick tripod,solve your problem at once!



Features:

High quality plastic mini tripod base support.

Mini design,easy to carry for outdoor.

humanized and non-slip design to support camera stably.

You can also connect tripod and cellphone with a screw phone clip.



Specification:

Product Name:Universal Black Plastic Tripod Cell Phone Camera Rotation Desktop Base Support

Material: Plastic

Weight:23 grams

Color:Black

Product Dimension: app. 12 × 1.8 cm / 4.72 × 0.7 inch (Length × Diameter)

Height After Supporting: 6 cm / 2.36 inch

Pattern Type:Solid Color

Occasions: Take picture

Style: Support frame

Quantity: 1 pc

Product description

This adaptor allows you to fit the Manfrotto Q6 Top Lock quick release system to an existing photo head. The Top Lock system has been developed to offer photographers a fast, easy to use and very secure camera quick release mechanism suitable for heavy pro equipment. The camera plate clicks into the clamp from above, and as soon as it engages, it triggers a safety pin that stops the plate and camera from sliding out accidentally. Even before the clamp is locked, the camera is securely supported. Made from lightweight aluminum, the clamp has 3 bubble spirit levels (one for each axis of rotation) to facilitate precise framing and help produce straight images in-camera, ensuring the camera's full frame is usable and reducing post-production time. A Q6 Arca-compatible plate is supplied with the adaptor. Spare plates can be purchased separately. Specifications attachment (top) 1/4" screws attachment type bubble spirit level (no.) 3 number Color black color material aluminum plate type MSQ6PL quick release yes secondary safety system yes weight 0.37 lbs

• Fit the Manfrotto Q6 Top Lock quick release system to an existing photo head
• Fast, easy to use and very secure
• Quick release mechanism suitable for heavy pro equipment

User questions & answers

Question:	Can i use this on model 290-mt294a
Answer:	It is compatible with Peak Design plates as they use Arca style plates.
Question:	Is this item fit on mhxpro-bhq2 xpro ball head
Answer:	We recommend the smaller version of this for the BeFree being the Manfrotto MSQ6T.
Question:	Is the msq6 compatible with peak design capture and procapture plates
Answer:	Yes, it does, to a point. It supports your neck and upper back from sliding. It is more like a water proof pillow.
Question:	Will this work on a be free tripod with a 200lt-pl head to convert to arca swiss
Answer:	All three sections of foam pad are the same at about 1 - 1/4" (one and a quarter inch) thick.

Product description

Celestron’s SkyMaster series of large aperture binoculars are a phenomenal value for high performance binoculars ideal for astronomical viewing or for terrestrial (land) use - especially over long distances. Each SkyMaster model features high quality BaK-4 prisms and multi-coated optics for enhanced contrast. Celestron has designed and engineered the larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions.

Binoculars come in a wide range of shapes and sizes these days, and an even wider range of prices. It's easy to spend less than $100 or more than $500 for what may appear to be, at least outwardly, comparable models. While they may look the same, they are probably quite different on the inside.

Recently, the binocular market has seen a flood of giant binoculars at prices that were unheard of just a few years ago. In general, giant binoculars are defined as those that magnify the view 10 times or more and have 70-mm or larger front (objective) lenses. It used to be that the least expensive giant binoculars cost in excess of $150, even $200. All that changed not long ago, when the bottom fell out of the price cellar. Now, several companies import giant binoculars that sell for half that, or less.

Celestron's 15x70 SkyMaster binoculars are one of the leaders in the low-price giant binocular arena. They certainly sound good on paper. The SkyMasters include multicoated optics and BaK-4 internal prisms, two features that promise brighter, better images, and key points to look for when judging a pair of binoculars. They also come with an adapter for attaching them to a photo tripod, which is a must to use them to their fullest, and a soft carrying case. But just because they are cheap doesn't always mean they are worth the price. Would it be better to save up for a more expensive pair?

To find the answer, I had an opportunity recently to judge the SkyMasters against a pair of Fujinon 16x70 FMT-SX binoculars , one of the finest pairs of giant binoculars sold today. Like the SkyMasters, the Fujinons feature BaK-4 prisms, but also have fully multicoated optics. As a general rule, superior coatings mean superior image sharpness and contrast. But then, that should be expected, given that the Fujinons cost many times more than the Celestrons.

While the Fujinons were clearly the better performer, the Celestron SkyMasters held up admirably. Image brightness, quality, and contrast were all remarkable considering their bargain price. Although images were a little soft across the outer 25% of the Celestron's field, the overall view was impressive nonetheless.

Some inexpensive binoculars have very sloppy focusing, causing the eyepieces to tilt and shift. Not so with the SkyMasters. I found that their center-focusing mechanism worked smoothly, with no apparently backlash or wobble. Eye relief (the distance you hold your eyes away from the eyepieces to see the full field) is stated to be 18 mm, a good distance for higher power binoculars and an important consideration if you must wear glasses when viewing. The SkyMasters are also light enough to support by hand for short periods of time, although buyers would be well advised to mount them on a sturdy photo tripod.

The bottom line is, if you are considering a pair of giant binoculars, whether for bird watching, stargazing, or another recreational use, and have a limited budget, Celestron's giant 15x70 SkyMasters represent an excellent value. --Phil Harrington, author of Star Ware and Star Watch

Pros:

• Exceptional value for the price
• Light enough to support by hand
• BaK-4 prisms
• Multicoated optics

Cons:

• Outer 25% of the field is soft and a little blurry
• Requires a tripod to use for extended periods

From the Manufacturer

NO FAULT Binocular Warranty

The No-Fault warranty is applicable to all Celestron binoculars.

(excluding the VistaPix digital camera/binoculars which feature a 2-year warranty) 

 

A. Celestron warrants this binocular to be free from defects in materials and workmanship for its usable lifetime. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to the obligation of Celestron to repair or replace such product, the product must be returned to Celestron prepaid together with proof-of-purchase satisfactory to Celestron.  The proper Return Authorization Number must be obtained from Celestron in advance of return.  Call Celestron at (310) 803-5955 to receive the number to be displayed on the outside of your shipping container.  You can also send an email for this number from the support section of the Celestron website.

B. The NO FAULT provision of this warranty means that regardless of how the binoculars may have been damaged or rendered unusable (fully or partially) by the

Owner of the binocular, Celestron will repair or replace the binocular without any questions being asked.

To take advantage of this provision, enclose a check or money order for $ 25.00 (U.S. dollars) with the binocular to cover inspection, handling, and shipping.

All returns must be accompanied by a written statement setting forth the name, address, and daytime telephone number of the owner, together with a brief description of any claimed defects. Parts or product for which replacement is made shall become the property of Celestron.

Celestron shall use reasonable efforts to repair or replace any binocular covered by this limited warranty within thirty days of receipt. In the event repair or replacement shall require more than thirty days, Celestron shall notify the customer accordingly. Celestron reserves the right to replace any product which has been discontinued from its product line with a new product of comparable value and function.

CELESTRON DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE, EXCEPT AS EXPRESSLY SET FORTH HEREIN.

THE SOLE OBLIGATION OF CELESTRON UNDER THIS LIMITED WARRANTY SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT, IN ACCORDANCE WITH THE TERMS SET FORTH HEREIN. CELESTRON EXPRESSLY DISCLAIMS ANY LOST PROFITS, GENERAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT FROM BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR INABILITY TO USE ANY CELESTRON PRODUCT. ANY WARRANTIES WHICH ARE IMPLIED AND WHICH CANNOT BE DISCLAIMED SHALL BE LIMITED IN DURATION TO A TERM OF ONE YEAR FROM THE DATE OF ORIGINAL RETAIL PURCHASE.

Some states do not allow the exclusion or limitation of incidental or consequential damages or limitation on how long an implied warranty lasts, so the above limitations and exclusions may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Celestron reserves the right to modify or discontinue, without prior notice to you, any model or style binocular.

If warranty problems arise, or if you need assistance in using your binocular contact:

Celestron

Customer Service Department

2835 Columbia Street

Torrance, CA 90503 U.S.A.

Tel. (310) 328-9560

Fax. (310) 212-5835

Monday-Friday 8AM-4PM PST

NOTE: This warranty is valid to U.S.A. and Canadian customers who have purchased this product from an Authorized Celestron Dealer in the U.S.A. or Canada. Warranty outside the U.S.A. and Canada is valid only to customers purchased from a Celestron Distributor or Authorized Celestron Dealer in the specific country and please contact them for any warranty service.

• Multi coated optics
• Large aperture perfect for low light conditions and stargazing
• Tripod adapter 13 millimeter (0.51 inch) long eye relief ideal for eyeglass wearers; Linear Field of View (@1000 yards) / @1000 meter) 231 feet (77 meter)
• Diopter adjustment for fine focusing; Angular field of view 4.4 degrees
• Large 70 millimeter objective lens offers maximum image brightness in low light and long range conditions

User questions & answers

Question:	how does the tripod adpater hook on? I got it today but im confused how that part hooks on? and then to the tripod
Answer:	Hi, in the middle of the skymaster, there is one circled logo of Celestron cap. Please remove by unscrew this. You can able to hook the tripod. Thanks.
Question:	why do so many people prefer these over the 20x80 and 25x
Answer:	15x is at the upper limit of what can be hand held. Higher powers would need a tripod to be steady enough. Even at 15x some people would need a tripod or something to lean against. Lower powers give wider fields of view and brighter images. Large binoculars such as 80mm are heavy and need a tripod regardless of magnification. If you want both bright images and high powers look into larger binoculars such as 80 or 100mm.
Question:	can one side be adjusted seperately for my vision? I have decent vision in left eye and poor vision in right eye. thanks
Answer:	Yes, first use the center adjustment to get it focused correctly for the left eye...now close your left eye and look only thru your right eye and adjust the right eyepiece until it comes into focus. Now you should be able to see clearly with both eyes!
Question:	I wondering why so many people have said these work better than their telescopes? If these are 15x and a cheap tele is 100x why are these so great
Answer:	The principal feature of a telescope is not magnification, but light gathering power. These 70mm binoculars gather about as much light as a 100mm telescope. But since you are using both eyes, the view will appear better. But even in my case, with a 13" diameter mirror in my scope, before I look for anything my binoculars are out checking out the field of view and much of the time even showing me what my telescope will be looking at. Binoculars force you to learn the sky and not be dependent on any coordinate system. They show you larger objects like the double cluster in Perseus, the Pleiades and Hyades star clusters in Taurus, the Beehive cluster in Cancer and even the Andromeda Galaxy better than you can in a telescope because you simply get to see the object in context. There are some large, face-on galaxies like M-33 and M-101, which are easier to spot in these binoculars than they are in a 10" telescope. Without the context of the black sky behind the object there is no contrast and you can't see it.Even with a large telescope, you'll spend most of your time observing at under 100 power. Selling telescopes by magnification is just taking advantage of newbies because you can obtain any magnification with any telescope depending on what eyepiece you use. The question is "will you be able to see anything?"

Product features

SkyMaster 15x70mm Porro Binocular

A high-quality yet affordable choice for binocular astronomy or long-distance terrestrial viewing with large 70mm objective lenses and powerful 15x magnification.

Product description

Arca-type adaptor suitable for 494, 496 and 498 headsCompact and lightweight, perfect for Befree rangeSpecially designed to fit between the tripods folded legsErgonomic knob for fast and easy camera release2-Axis spirit level for precise framing

Product description

This top plate is the same as the one that comes as standard with a new Gitzo Systematic tripod (Series 2, 3 or 4). It can mount a flat based photographic or video head, or any other equipment with a 3/8" female thread. The machined ring on the underside of the plate is compatible with the safety catch feature of Gitzo's updated Systematic range, offering secure, accident-proof support, even during changeovers of center components. The bottom of the plate also features a hook that allows weights or bags to be hung under the tripod to further improve stability.

• Package Weight : 1 pounds
• Country of Origin : Italy
• Standard 3/8" female mounting thread
• Incudes hook for adding weight for stability