- 1 x Sigma HU-21 Hot Shoe Unit
Trusted & Verified
Sigma HU-21 Hot Shoe Unit for FP2 Camera with Flash Communication Accessory
- Attachable hot shoe unit made for the Sigma FP2
- Adds a dedicated flash communication terminal
- Enables supported external flash use when mounted
- Expands the modular Sigma FP2 camera system
- Provides a defined connection point for compatible flash equipment
The Sigma HU-21 Hot Shoe Unit adds an attachable hot shoe connection to the Sigma FP2 camera. It gives FP2 users access to a dedicated flash communication terminal while keeping the camera system modular. For photographers who want to work with external flash equipment, the HU-21 provides the connection point Sigma specifies for that purpose.
External Flash Support for Sigma FP2
Sigma states that external flash support on the FP2 is available when the HU-21 is mounted. This makes the unit an important expansion accessory for photographers who need flash functionality while using the compact FP2 body. The accessory attaches directly to the camera and adds the dedicated hot shoe connection required for supported external flash operation.
Shared Flash Communication Standard
The HU-21 uses the shared flash communication terminal specification documented by Sigma. This gives photographers a clearly defined connection standard when planning a compatible lighting setup around the Sigma FP2. Compatibility should still be confirmed for the specific flash or lighting accessory being used.
For Sigma FP2 owners building a more flexible still photography setup, the HU-21 adds the dedicated flash connection described by Sigma without permanently expanding the core camera configuration.
General
Product Type:
| Product Type | Attachable Hot Shoe Unit |
Model:
| Model | HU-21 |
Camera Compatibility:
| Compatible Camera | Sigma FP2 |
Flash Connection:
| Connection Type | Flash Communication Terminal |
| External Flash Support | Available on Sigma FP2 when HU-21 is mounted |
Join the WaitlistCustomers sign up with their email to be added to the waitlist.
Priority NotificationCustomers are notified in the order they signed up.
Checkout Link SentWhen inventory becomes available, a checkout link will be emailed for immediate checkout.
First Come, First ServedAvailability is limited and purchases are first come, first served.
Expected Availability November 2026 . Initial inventory may be limited.
Join the WaitlistCustomers sign up with their email to be added to the waitlist.
Priority NotificationCustomers are notified in the order they signed up.
Checkout Link SentWhen inventory becomes available, a checkout link will be emailed for immediate checkout.
First Come, First ServedAvailability is limited and purchases are first come, first served.
Expected Availability November 2026 . Initial inventory may be limited.
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Interest-free installments and monthly financing may be available through Shop Pay on eligible purchases.
Starting at $45.25
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Tab: Frequently Asked Questions
How do I return an item?
How do I return an item?
Returns are incredibly simple. Please log into your account, find your item you wish to return and follow the prompts to make a return. If you do not have an account, click here to find your order and make a return.
Will I receive a full refund when I return an item?
Will I receive a full refund when I return an item?
You will receive a full refund when you return an item in its original manufacturer’s packaging, undamaged and unmarked. If the item you are returning is priced at less than $35, you will be charged a 15% restocking fee. Please note you will not be refunded any shipping charges.
How many days do I have to make a return?
How many days do I have to make a return?
You have 30 days to make a return. During the holiday season, from November 1 to December 31, we extend the return window to 60 days.
My item was damaged in transit. How do I place a return?
My item was damaged in transit. How do I place a return?
If your order has been noticeably damaged in transit, we strongly recommend that you refuse delivery and notify us immediately. Claims for missing items or items damaged in transit must be made within 48 hours of delivery. If there is carrier damage, please contact support@focuscamera.com with your order number and a description of the damage.
There’s an issue with my order, what should I do?
There’s an issue with my order, what should I do?
Oh no! Please contact our customer service team so we can resolve the issue immediately. You can call us on 1.800.221.0828, email us at support@focuscamera.com, or send us a message here.
Can I exchange an item?
Can I exchange an item?
We do not currently offer exchanges. Please return the item you purchased within 30 days and order what you’d like instead.
If I ordered a kit, do I have to return all the items?
If I ordered a kit, do I have to return all the items?
If you ordered a kit, you must return all components and accessories to receive a full refund.
I ordered a product that included a free item. I’d like to return it, do I need to return the free item as well?
I ordered a product that included a free item. I’d like to return it, do I need to return the free item as well?
If you ordered a product that included a free item, you must include the free item with your return. If not, your return will not be accepted and you will not receive a full refund.
Do you offer repairs?
Do you offer repairs?
We currently only offer camera repairs at our Brooklyn store. The item must be dropped off and collected in person as we do not accept shipped items for repair. For more information, please call our Brooklyn store on 1.718.431.7900.
What is your return policy?
What is your return policy?
Most items can be returned within 30 days for a full refund. Click here to read our full return policy.
