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"The Hot Shoe"
"The Hot Shoe"
Published: 2014/08/04
Channel: Card Counter
What Is A Hot Shoe vs Cold Shoe On DSLR/Mirrorless Camera?
What Is A Hot Shoe vs Cold Shoe On DSLR/Mirrorless Camera?
Published: 2017/03/27
Channel: Eric Rossi
My Favorite DSLR Accessory! Hot Shoe Extension Bar // Chris Winter
My Favorite DSLR Accessory! Hot Shoe Extension Bar // Chris Winter
Published: 2014/05/07
Channel: Chris Winter
Connecting to a hot-shoe flash | Canon 6D | lynda.com
Connecting to a hot-shoe flash | Canon 6D | lynda.com
Published: 2014/10/01
Channel: LinkedIn Learning Solutions
DIY Hot Shoe Adapter
DIY Hot Shoe Adapter
Published: 2012/01/27
Channel: krotoflik
Hot Shoes Commercial!
Hot Shoes Commercial!
Published: 2012/11/16
Channel: Razor Blade
Scott Kelby
Scott Kelby's Photo Tips for Lighting a Groom with Hot Shoe Flash
Published: 2015/12/11
Channel: Scott Kelby
Vello Universal Hot Shoe Adapters
Vello Universal Hot Shoe Adapters
Published: 2012/04/18
Channel: B and H
Shape And Zacuto Hot Shoe Top Handles Review
Shape And Zacuto Hot Shoe Top Handles Review
Published: 2013/07/16
Channel: DSLR Video Shooter
EYNPIRE CAMERA TRIPLE HOTSHOE V MOUNT | DEMO
EYNPIRE CAMERA TRIPLE HOTSHOE V MOUNT | DEMO
Published: 2017/03/26
Channel: BenoniTech
Get Hot Shoe Covers by the Dozens!!!
Get Hot Shoe Covers by the Dozens!!!
Published: 2015/11/10
Channel: EMIP TV
Lastolite Ezybox Hotshoe - Photoshoot with Damien Lovegrove
Lastolite Ezybox Hotshoe - Photoshoot with Damien Lovegrove
Published: 2012/05/28
Channel: Lovegrove Training
The Best $7 DSLR accessory you
The Best $7 DSLR accessory you'll ever buy: Hot shoe splitter
Published: 2015/09/08
Channel: pumthuggee
Cheetah TV: Mini Ball Head and Hot Shoe Adapter
Cheetah TV: Mini Ball Head and Hot Shoe Adapter
Published: 2017/06/26
Channel: Shoms Photography
Canon DSLR camera hot shoe FLASH wobbly 7D 60D 5D MARK III
Canon DSLR camera hot shoe FLASH wobbly 7D 60D 5D MARK III
Published: 2017/01/07
Channel: Mosquitobites24
The Real Issue About the Sony Multi-Interface Hot Shoe. How to!
The Real Issue About the Sony Multi-Interface Hot Shoe. How to!
Published: 2015/05/15
Channel: Lavikka Photography
GoPro Mount On DSLR Camera - GoPro Tip #145
GoPro Mount On DSLR Camera - GoPro Tip #145
Published: 2013/03/26
Channel: MicBergsma
Lume Cube Basic Steps: Hot Shoe Mount
Lume Cube Basic Steps: Hot Shoe Mount
Published: 2016/03/23
Channel: Lume Cube
Sony A6000 Hot Shoe FIX
Sony A6000 Hot Shoe FIX
Published: 2015/01/28
Channel: The Photo/Video Show
Joe McNally Ezybox Hotshoe (LL LR2462JM)
Joe McNally Ezybox Hotshoe (LL LR2462JM)
Published: 2014/03/07
Channel: Lastolite By Manfrotto
DSLR Hot Shoe V Mount Review!
DSLR Hot Shoe V Mount Review!
Published: 2012/02/21
Channel: Max Lee
1/4" HOT-SHOE ADAPTER IN A HURRY!!!
1/4" HOT-SHOE ADAPTER IN A HURRY!!!
Published: 2017/01/01
Channel: Life in 720p
Gopro DSLR hotshoe mount
Gopro DSLR hotshoe mount
Published: 2014/02/25
Channel: Pete Leong
Photography Tips and Tricks: Using Gels with Hot Shoe Flash - Episode 43
Photography Tips and Tricks: Using Gels with Hot Shoe Flash - Episode 43
Published: 2013/11/14
Channel: KelbyOne
How To Level A Tripod With a Bubble Level | Hot Shoe Bubble Level On Your Cameras | TUTORIAL
How To Level A Tripod With a Bubble Level | Hot Shoe Bubble Level On Your Cameras | TUTORIAL
Published: 2015/11/10
Channel: Digital Goja
How to fix a loose Canon 5D III hot shoe / wobbly Canon speedlite flash - Easy!
How to fix a loose Canon 5D III hot shoe / wobbly Canon speedlite flash - Easy!
Published: 2014/08/07
Channel: photovideo101
Hot Shoe Fix #3 - Travor Hot Shoe adapter Review for Sony a6000, A7r, A7
Hot Shoe Fix #3 - Travor Hot Shoe adapter Review for Sony a6000, A7r, A7
Published: 2015/01/04
Channel: Lavikka Photography
Chargercity DSLR Smartphone Hot Shoe Mount - DSLR FILM NOOB
Chargercity DSLR Smartphone Hot Shoe Mount - DSLR FILM NOOB
Published: 2014/05/23
Channel: dslrfilmnoob
Sony ILCE a6000 Hot Shoe for flashes fix Updated -How to.
Sony ILCE a6000 Hot Shoe for flashes fix Updated -How to.
Published: 2014/11/30
Channel: Lavikka Photography
Hotshoe Customs M109R
Hotshoe Customs M109R
Published: 2010/12/19
Channel: Hotshoe Customs
Cowboystudio L Bracket with 2 Standard Flash Hot Shoe Mounts
Cowboystudio L Bracket with 2 Standard Flash Hot Shoe Mounts
Published: 2011/08/11
Channel: cowboystudio
Dual Mount Hot Shoe Camera Mount For Microphone And Light
Dual Mount Hot Shoe Camera Mount For Microphone And Light
Published: 2017/07/02
Channel: GivesAMinute
Hotshoe Customs 360 tire drop chop park
Hotshoe Customs 360 tire drop chop park
Published: 2007/08/10
Channel: Hotshoe Customs
Tmart Hot Shoe to Ball Head Adapter Review
Tmart Hot Shoe to Ball Head Adapter Review
Published: 2012/10/21
Channel: Gio
Canon EOS 7D Hot Shoe Fix
Canon EOS 7D Hot Shoe Fix
Published: 2016/11/07
Channel: TUR Photography
Sony Hotshoe to Wireless Nex-7
Sony Hotshoe to Wireless Nex-7
Published: 2012/05/16
Channel: Jon Adams
Weifeng NEX 3 5 C3 F3 5N 5R Proprietary to Hot Shoe Adapter Review
Weifeng NEX 3 5 C3 F3 5N 5R Proprietary to Hot Shoe Adapter Review
Published: 2013/01/24
Channel: That_Canon_Guy's Reviews
Camera Hot Shoe Adapter for Canon Mini Hot Shoe
Camera Hot Shoe Adapter for Canon Mini Hot Shoe
Published: 2015/10/25
Channel: PRODUCT WORLD
HOT SHOE pins.... Fire, Ready, Quench, Ground
HOT SHOE pins.... Fire, Ready, Quench, Ground
Published: 2017/04/16
Channel: Theoria Apophasis
Godox Wistro AD200 S-Type bracket fix & hotshoe mounting
Godox Wistro AD200 S-Type bracket fix & hotshoe mounting
Published: 2017/04/13
Channel: Wes Perry
How to: Hot Shoe Mount Replacement for Canon Speelite 580EX
How to: Hot Shoe Mount Replacement for Canon Speelite 580EX
Published: 2011/03/05
Channel: Pro Camera Repair
Hot Shoe Shuffle - Highlights - Original Cast
Hot Shoe Shuffle - Highlights - Original Cast
Published: 2013/02/20
Channel: Sydney Lyric
ZOOM H1 | MOUNT TO CAMERA/HOTSHOE [FOR $5!]
ZOOM H1 | MOUNT TO CAMERA/HOTSHOE [FOR $5!]
Published: 2017/07/06
Channel: BenoniStudio
Sony Hotshoe Converter Alternative ADPMAA
Sony Hotshoe Converter Alternative ADPMAA
Published: 2016/03/08
Channel: RiaanRouxPhotography
RØDE VideoMic Original | Fixing Broken Hot Shoe Mount | Quick Tip #1
RØDE VideoMic Original | Fixing Broken Hot Shoe Mount | Quick Tip #1
Published: 2017/01/12
Channel: Purveyor of Awesome
Shadow NEX hotshoe adapter working with Pocket Wizard.
Shadow NEX hotshoe adapter working with Pocket Wizard.
Published: 2012/05/22
Channel: Jeremy Chan
Hot Shoe Level Cover Nikon D7000
Hot Shoe Level Cover Nikon D7000
Published: 2016/11/27
Channel: Kata Ayah
Godox Flash hot shoe Problem
Godox Flash hot shoe Problem
Published: 2015/12/01
Channel: The Flasher
a6000 flash bounce & hot shoe cover
a6000 flash bounce & hot shoe cover
Published: 2015/06/06
Channel: aeropic
Simple but useful bubble level hot shoe cover
Simple but useful bubble level hot shoe cover
Published: 2012/09/08
Channel: Nitsan Simantov
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
  (Redirected from ISO 518)
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Canon EOS 350D Hot shoe
Proprietary hot shoe used by Minolta and older Sony cameras (Konica Minolta Maxxum 7D)

A hot shoe is a mounting point on the top of a camera to attach a flash unit and other compatible accessories. It takes the form of an angled metal bracket surrounding a metal contact point which shorts an electrical connection between camera and accessory for standard, brand-independent flash synchronization.

The hot shoe largely supplanted the "accessory shoe" or "cold shoe", intended to hold flashes that connected electronically via an outboard cable, prevalent in the 1970s. These earlier accessory shoes were mostly the same U shape, and thus provided the template for the introduction of the hot shoe.

The dimensions of the hot shoe are defined by the International Organization for Standardization in ISO 518:2006, but manufacturers differ in details such as trigger voltage and thus incompatibilities are still possible between brands.

Design[edit]

The hot shoe is shaped somewhat like an inverted, squared-off "U" of metal. The matching adapter on the bottom of the flash unit slides in from the back of the camera and is sometimes secured by a clamping screw on the flash. In the center of the "U" is a metal contact point. This is used for standard, brand-independent flash synchronization. Normally the metal of the shoe and the metal of the contact are electrically isolated from each other. To fire the flash, these two pieces are shorted together. The flash unit sets up a circuit between shoe and contact—when it is completed by the camera, the flash fires.

In addition to the central contact point, many cameras have additional metal contacts within the "U" of the hot shoe. These are proprietary connectors that allow for more communication between the camera and a "dedicated flash".[citation needed] A dedicated flash can communicate information about its power rating to the camera, set camera settings automatically, transmit color temperature data about the emitted light, and can be commanded to light a focus-assist light or fire a lower-powered pre-flash for focus-assist, metering assist or red-eye effect reduction.[citation needed]

The physical dimensions of the "standard hot shoe" are defined by the International Organization for Standardization ISO 518:2006.[1][2]

History and use[edit]

Before the 1970s, many cameras had an "accessory shoe" or "cold shoe", intended to hold flashes that connected electronically via an outboard cable, or other accessories such as external light meters, special viewfinders, or rangefinders, such as the Leica. These earlier accessory shoes were mostly the same U shape, and thus provided the template for the introduction of the hot shoe. Any required electrical connections were made using external cables and connectors, such as the PC connector.

Canon, Nikon, Olympus, and Pentax use the standard ISO hot shoe with various proprietary electronic extensions.

In 2014, camera accessory manufacturer, Cactus, have combined these electronic extensions into a multi-brand hot shoe on their wireless flash transceiver V6. With multi-brand ISO hot shoe, cameras and flashes from different camera makers could work cross-brand.

Since 1988, Minolta switched to use a 4-pin proprietary slide-on auto-lock "iISO" connector. A compatible 7-pin variant, which allows battery-less accessories to be powered off the camera's battery existed as well, but was not widely used. Konica Minolta and Sony Alpha digital SLR cameras are based on Minolta designs and therefore used the same connector, officially named Auto-lock Accessory Shoe, as well up to 2012. Since the electrical protocol remained mostly compatible, TTL and non-TTL adapters exist to adapt ISO-based flashes to iISO hotshoes and vice versa.

Sony also used a variety of other proprietary hotshoes for other digital cameras, including the ISO-based 6-pin Cyber-shot hotshoe, the 16-pin Active Interface Shoe (AIS) and the ISO-based 16-pin Intelligent Accessory Shoe (IAS). Some of their NEX cameras used a proprietary Smart Accessory Terminal (versions 1 and 2). In September 2012, Sony announced a new ISO-based 21+3 pin Multi Interface Shoe for use with their future digital cameras of the Alpha, NEX, Handycam, NXCAM and Cyber-shot series. This quick-lock hotshoe is mechanically and electrically compatible with a standard 2-pin ISO-518 hotshoe, but electrically compatible with the previous Auto-lock Accessory Shoe with extensions, so that passive adapters ADP-AMA and ADP-MAA allow to use digital-ready iISO flashes on new cameras and some new Multi Interface Shoe equipment on older cameras, while providing compatibility with standard ISO-based equipment as well.

Canon uses a non-ISO-based 13+1 pin hot shoe, named Mini Advanced Shoe on some of its camcorders.

Voltages[edit]

An internal camera circuit shorts the center contact and shoe mount, thus triggering the flash. The trigger voltage (for a flash) between the center contact and the shoe has varied over the years, between manufacturers, and even in the same manufacturer. When the contacts with a shutter were mechanical contacts, the actual voltage and polarity did not matter too much as long as it did not cause arcing, but now with electronic triggering, either or both can cause problems.[3]

The ISO 10330 specification allows for a trigger voltage of 24 volts. Some manufacturers, particularly Canon, ask for no more than 6 volts. Some older flashes may have significantly high voltages, sometimes in the several hundreds of volts.[4] Some of them may also use negative DC polarity, and some studio flashes may even provide AC voltages. Whilst no problem for electromechanical trigger contacts in older cameras, not all electronically controlled trigger circuits in newer cameras are designed to work with inverse DC polarity or AC.

Minolta documented all their cameras' electronically controlled PC terminals and ISO hot shoes to be protected up to 400 volts, whereas the iISO hotshoe contacts are only protected up to ca. 5 volts in some cameras.

It is possible to connect a high voltage triggering flash with a camera, which can only tolerate 5 or 6 volts, through the use of an adaptor containing the necessary voltage protection circuitry, typically using a high power TRIAC. Such adapters drain power from the flash's trigger voltage and therefore often do not need a power supply of their own.

In order to avoid dangerous loops when connecting equipment in complex studio setups, better adapters offer voltage protection and galvanic isolation of the units. Such adapters will ensure that there is no electrical connection of any kind between both sides of the adapter, including ground. They either use transformers or opto-couplers to transfer the trigger impulse from the camera to the flash. Their electronics cannot be powered from the flash and therefore needs a power supply in form of a small battery. As an example, Minolta offered the PC terminal adapter PCT-100 (8825-691) for this purpose, which worked as a galvanic isolator and could withstand 400 volts DC or AC. The similar Sony flash sync terminal and ISO hotshoe adapters FA-ST1AM and FA-HS1AM offer galvanic isolation as well, but can withstand voltages up to 60 volts DC or AC only.

Flash servos and radio triggers, e.g. PocketWizard, can function as galvanic isolators as well, since trigger and receiver unit remain physically separate. The camera will only "see" the low voltage provided by the local trigger unit necessary in order to detect the camera's trigger impulse, and the remote receiver unit will handle up to 200 volts from its flash port,[5] thus isolating the camera from the flash's high voltage trigger circuit.

While the most common problem adapting flash equipment to cameras is an excessive trigger voltage, sometimes the trigger circuit voltages provided by some modern flashes or radio triggers can also be too low to ensure that the electronic triggering circuits in the camera or receiver can still reliable trigger it. Trigger circuit voltages below ca. 2 to 2.5 volts may exhibit this problem, unless the triggering circuit is specifically designed to continue to work with such low voltages as well.

Older cameras still equipped with an electro-mechanical trigger contact may exhibit yet another problem. If they provide both, an ISO hotshoe and a PC terminal, both are typically wired to the same trigger contact in the camera rather than triggered independently as in cameras with electronic triggering circuits. When only the PC terminal is used and the hotshoe remains un-populated, a flash with high trigger circuit voltages connected to the PC terminal delivers this voltage on the normally unprotected middle contact of the camera's ISO hotshoe. If the photographer's eyebrows accidentally get into contact with the middle contact, the electrical shock can cause pain or even injuries. One way camera manufacturers have used to avoid this problem was to use two independent trigger contacts, which, however, could cause flash synchronization problems. Another, as utilized by Minolta in all such cameras supporting a PC terminal, was to add a small hidden contact on the side of the ISO hotshoe, which would disable the middle contact until some equipment was mounted in the hotshoe, thereby avoiding any possible contact with the operator's eyebrows as well.

Modern cold shoes and other devices[edit]

There is still a use for "cold shoes" i.e., a shoe mount without the "hot" connection. These are often used off-camera, having one or more flash units mounted on stands and connected to the camera by cable or triggered by wireless means.[6]

Non-flash items can also be mounted on the hot shoe of their cameras. For instance, for the Olympus XZ-1, one can buy items such as a stereo microphone or three different models of electronic viewfinder.[7] Another example is the FotoSpot geo tagging GPSes which utilize the hotshoe for mounting to the camera.

References[edit]

External links[edit]

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