The Interfit S1 is the first high-tech TTL HSS monolight to include intelligent TTL and HSS technology in a battery-powered monolight with an included International Multi-Voltage AC Power adapter in one complete package.
UNIVERSAL MANUAL REMOTE BACKDATE 2.6
If you have purchased the S1a with the Universal Manual Remote (INTR1B) you will need to backdate your S1 head to 2.6 for your remote to work. This is because we now ship the flash heads with the latest software 2.7 which is incompatible with the Manual Remotes. firmware can be downloaded from the download tab above.
|Power Range||9-Stops (500Ws – 1.9Ws)|
|Recycle Time Full Power||3 Seconds|
|Flash Duration||1/500 – 1/11,000 (max-min power)|
|Colour Temperature||5700K +/- 100K|
|Fitting Type||Bowens® / S-Type|
|Modeling Lamp||10W LED|
|Triggering||Interfit TTL-C/N/S 2.4GHz Remote, Sync Port, IR/Optical|
|Shooting Modes||Manual, TTL (Canon/Nikon/Sony), HSS|
|Maximum Flash Sync Speed||1/250sec. in normal sync mode, 1/8000sec. in high speed sync mode|
|Operating Voltage||100-240V AC|
|Battery Type||4500mAh Li-Ion|
|Battery Life||350 full power flashes|
|Battery Recharge Time||3 Hours|
|Auto Power Dump||Yes|
|Flash Ready Indicator||LED and switchable audible|
|Dimensions||34 x 23 x 13cm (13.4 x 9.1 x 5.1")|
|Box Contains||1x - S1 Flash Head, 1x - 18cm (7") Reflector - with Bowens® S-Mount, 1x - Battery for Interfit S1, 1x - S1 Battery Charger, 1x - AC Power Pack for Interfit S1, 1x - Micro-USB Cable, 1x - Sync Cable|
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.
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.
Please see this video on how to change the flash tube.
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.
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.
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.
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.
Yes, but like with any socket do not overload the extension lead and make sure it is a properly rated, surge protected extension lead.
Yes you can use your [HB320/HBU250/INTS1/INTS1A/Monolight/F121] in Europe.
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.
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.
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.
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.
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.
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 firstname.lastname@example.org 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.
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.
We accept all major credit and debit cards