50% Off Remote

Interfit S1a HSS TTL Flash, AC only

Code: INTS1A
  • £399.99
  • (FREE UK Delivery)
Item in Stock | Free Next Day Delivery Before 2pm*
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  • Speed Super sharp images with HSS up to 1/8000th 
  • Power Up to a massive 500w with precise control of 1/10th increments gives absolute control
  • Functionality Can be controlled from up to 90m with multi-functional remote
  • Ease Full TTL compatibility
  • Portability Fully battery powered, with up to 430 full power flashes from a single charge!
  • Compatibility S type modifier mount giving countless light shaping options.
We Are Open For Business As Usual Our online store is still open and we will be working hard to get your orders our to you.
Free Standard Delivery to UK mainland addresses
PAYPAL EXPRESS Pay with your PayPal account
1 Year Warranty We will replace any faulty Flash unit within a one year period*

The Interfit S1a AC, HSS & TTL Flash is the AC-powered counterpart to the award-winning S1 and contains all of the same intelligent TTL and HSS technology.

Features:

  • Through The Lens Metering in TTL Mode uses the S1a’s entire 9-stop power range (500W – 1.9Ws) and is automatically calculated in 1/10th stop increments, and allows for ± 3 stops of exposure compensation
  • Manual Mode utilizes the entire 9-stop power range, controllable in 1/10th stop increments
  • High Speed Sync in Manual Mode at up to 1/8000th of a second shutter speed using the top 3 stops in the power range and is manually adjustable in 1/10-stop increments
  • Fast Recycle Time of only 2 seconds at full power allows for rapid shooting in a fast-paced studio environment.
  • Colour Accurate to within ±100 Kelvin using high-tech insulated-gate bipolar transistor (IGBT) technology
  • Short Flash Duration for freezing action and sports motion between 1/1000th of a second to 1/9000th depending on power output using IGBT technology.
  • Integrated Wireless System with remote TTL flash exposure compensation and manual power control in three groups from camera position using the S1 Remotes for Canon, Nikon, or Sony (sold separately)
  • Frosted Glass Dome softens and disperses light evenly through large and small light modifiers alike, from large octaboxes to small beauty dishes and reflectors while protecting the user-replaceable flash tube.
  • Aluminium Construction with an attractive matte finish gives the unit greater heat dispersion, durability and weight-to-rigidity efficiency
  • Firmware Upgrade via Micro USB Port for future fixes and features
  • Bowens® S-Type Mount is compatible with a large scope of adapter rings and modifiers such as softboxes, reflectors, and grids

Box Contains: 

  • 1 x S1a Flash Head
  • 1 x 18cm (7") Reflector - with Bowens® S-Mount
  • 1 x 4m (13') Power Cable
  • 1 x Micro-USB Cable
  • 1 x Sync Cable
S1A
Maximum Watt -Seconds500Ws
Power Range9 Stops (2.0 – 10.0)
Full Power Recycle Time2 Seconds
Flash Duration1/1000 – 1/16,000 (max-min power)
Colour Temperature5700K +/- 100K
Fitting TypeBowens® / S-Type
Modelling Lamp10W LED
TriggeringInterfit TTL-C/N/S 2.4GHz Remote, Sync Port, IR/Optical
Shooting ModesManual, TTL (Canon, Nikon, Sony), HSS
Maximum Flash Sync Speed1/250sec. in normal sync mode, 1/8000sec. in high speed sync mode
Operating Voltage220-230VAC or 110-120VAC
Fan CoolingYes
Auto Power DumpYes
Flash Ready IndicatorLED and switchable audible
Dimensions32 x 13cm (12.6 x 5.1″)
WeightKg 2.25Kg (4.9lb) Kg
In the Box1x - S1a Flash Head, 1x - 18cm (7") Reflector - with Bowens® S-Mount, 1x - 4m (13') Power Cable, 1x - Micro-USB Cable, 1x - Sync Cable
General
My [HB320/HBU250/INTS1/INTS1A] will not connect to the trigger?

Please ensure that you are on the same channel (this will be the number eg. 1a) on both the light and the trigger, as well as ensuring both the light and the trigger are up to date with your camera model. You can find firmware here

Please ensure your camera hot shoe settings are correct, please refer to your camera user manual.

If you think you have updated your firmware and it doesn’t suit your older camera type, please contact us for backdated firmware files – you must have a Dropbox/Google drive account to enable us to send them.

 
How do I set one of my [HB320/HBU250/INTS1/INTS1A] to fire at a higher/lower setting than another light on the same channel?

Simply set up the lights on the same channel, then set the group to a different setting, from here you can control individual lights. For example, one [light] can be on 1A at 4.5 and another [light] can be on 1B at 5.0 – as long as they are on the same channel they will fire at the same time with different settings.

How do I change the flash tube to my [HB320/HBU250/INTS1/INTS1A/F121]?

Please see this video on how to change the flash tube.

Can another light fire my [HB320/HBU250/INTS1/INTS1A/F121]?

Yes! All our Interfit flash range will have optical sync which will enable your flash to be triggered by another light source, simply set the mode to CELL and your [HB320/HBU250/INTS1/INTS1A] will be fired by another light. Cell mode works on the speed of light, for best results use a direct line. Please note, on this mode you cannot control HSS or TTL.

How do I connect my [HB320/HBU250/INTS1/INTS1A/F121] direct to my camera with a sync lead?

With the sync cable that comes with the [HB320/HBU250/INTS1/INTS1A] plug it directly into the PC Sync Socket on your camera. Entry-level cameras do not have these, but you can buy an adapter. Like cell mode, you will not be able to control HSS or TTL using this method to fire the lights.

My trigger will not fire my [HB320/HBU250/INTS1/INTS1A/F121] when connected to my camera?

Check that the hotshoe settings on your camera are set up correctly, refer to your camera’s user manual. 

Please also make sure all contact points on both the camera and trigger are clean and are not damaged.

Can I use another trigger to fire my [HB320/HBU250/INTS1/INTS1A] other than the S1 Nikon, Canon Sony and Manual triggers?

We cannot guarantee any third-party equipment will work with our Interfit lights as they would not have been tested. If they do work, it is not guaranteed that you will be able to control HSS and TTL functions with them. 

Can I plug my [HB320 /INTS1/INTS1A/Monolight/F121] into an extension lead?

Yes, but like with any socket do not overload the extension lead and make sure it is a properly rated, surge protected extension lead.

Can I use my [HB320/HBU250/INTS1/INTS1A/Monolight/F121] in Europe?

Yes you can use your [HB320/HBU250/INTS1/INTS1A/Monolight/F121] in Europe.

There is a delay when firing my [HB320/HBU250/INTS1/INTS1A] or it fires intermittently?

Please ensure that both the light and the trigger are up to date with your camera model. You can find firmware here. You could be over firing the flash, the higher the setting of the light intensity, the longer the flash tube will take to recharge.

The flash on my [HB320/HBU250/INTS1/INTS1A] doesn’t work?

Please ensure that both the light and the trigger are up to date with your camera model. You can find firmware here. Your flash tube may have reached the end of its lifespan, you may need to purchase a replacement. Please also ensure that the flash tube is installed correctly - see this video on how to change the flash tube.

UK Deliveries
FREE UK Mainland Delivery in a single order 
Otherwise, it's typically £5.99 per order
Delivery should be expected between 2-3 working days unless stated on the product page.

For more information on our deliveries please click here.


Please be aware that due to the Corona Virus that delivery services are operating a 1 attempt delivery only, If you miss your delivery then it will be sent back to us, this is out of our control, unfortunately. You will have to re-order or contact us to rearrange delivery. 


Worldwide Deliveries*
Approximately 4-10 working days depending on country
via Parcelforce Signed Delivery (fully traceable service). Please add items to the basket to calculate delivery for the desired country. This is not guaranteed delivery service due to COVID-19 and we advise caution when ordering. 


Signature Required
All our consignments irrespective of the carrier require a signature upon delivery. Small packages that can fit through a letterbox do not need to be signed for. Deliveries are typically made between 08:00 and 18:00 so please bare this in mind when choosing a delivery address.


Package Recycling
We do try when possible to reuse packaging from our own suppliers in order to send purchased items to our customers. We ask if the packaging is still in good condition after you've received your goods then please try to use it again or recycle if not possible.


Returns & Exchanges

While we hope that you will love every purchase, if you are not completely satisfied with your goods we will happily offer you a full refund or free exchange.
You are entitled to a refund or an exchange if you contact Interfit Photographic within 14 days of receipt to acknowledge the return.
You then need to return your item(s) within a further 14 days in a perfect, resalable condition with original box, all labels and tags attached.

All returns (unless the product/s are either faulty or damaged) postage costs are the responsibility of the customer and are not refundable. If the goods are faulty or damaged, we will provide pre-paid postage.

You can return your items in the post. We recommend a tracked delivery as you are responsible for the item until it arrives back.
Please contact help@interfitphoto.co.uk with your return tracking number. We are then aware you have returned your order, and this will avoid any delays in processing your request.

*Please note: Flashbulbs and flash tubes are non-returnable.

For more information on our returns policy click here.

Payment

Making a Purchase

To purchase the items in your basket and proceed with your order using our secure online purchasing facility, click on the "Checkout" button on the shopping basket screen. You will then be given the option to enter your email address and password if you are an existing user of the site, or you can choose to pay directly. You will then be transferred to our secure server provider Sagepay or PayPal to complete your order.

You will be asked to provide certain information we need to enable us to process your order such as your preferred delivery address and payment details. It is your responsibility to provide us with sufficient information to process your order. 

We will acknowledge receipt of your order by email. This is not our acceptance of your order, but confirmation that it has been received.

Cards Accepted

We accept all major credit and debit cards

 We accept all major debit and credit cards including
- Visa
- Master Card
- Maestro
- American Express
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