ZWO EAF Electronic Automatic Focuser

Product category: Product brand: ZWO Optics
ZWO EAF Electronic Automatic Focuser

ZWO EAF Electronic Automatic Focuser

  • ZWO EAF Electronic Automatic Focuser
  • ZWO EAF Electronic Automatic Focuser
  • ZWO EAF Electronic Automatic Focuser
  • C8/C925 kiinnike

Price 259,00 €

Introducing 5V EAF, this electronic focuser, like its previous version, enables precise, dynamic focus control for planetary and deep-sky imaging, while only connected with 5V USB.

Compared to its old version, the main change of 5V EAF is to remove the 12V power supply port. Now you can directly connect it to your camera, laptop or ASIAIR PRO via the USB 2.0 port & cable for both data transmission and power supply. This would not only make the cable management much easier, also effectively reduce the supply pressure.

The innovative decorative pattern on the EAF is inspired by the changes of Airy disk during focusing and the focusing curve, which makes it clear at a glance how this focuser works.


  • Highly integrated design
  • Support for ASCOM platform and various ASCOM-compatible third-party software
  • Support for INDI
  • Support for ZWO software such as ASIAIR and ASIStudio
  • Support for automatic focusing
  • Support for a hand controller and manual focusing
  • Support for a temperature sensor
  • USB HID device and drive-free
  • Stable and durable

Supported focusers:

  • Sky-Watcher: Newtonians, Black Diamond series, Dobsonians, Maksutov-Newtonians
  • SharpStar telescopes
  • SkyRover telescopes
  • TS Optics
  • Astro-Tech
  • Feather Touch

The following accessories are available for the EAF:

      In stock

      Technical Specifications

      • Size: 59mm x 52mm x 41mm
      • Motor: Stepper motor, 35mm diameter, 7.5° step angle
      • Reduction ratio: 120
      • Power/Data port: USB2.0 port, Type-B
      • Weight: 277g
      • Capacity: 5kg
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      Terms and conditions

      These terms and conditions are valid from November 7th, 2020.

      Contact information

      Astro Art Finland
      Sinirinnankatu 18
      FI-50190 Mikkeli

      Telephone: +358442778923
      VAT Number: FI32234856

      Products are sold for private customers over 18 years of age. Prices include VAT. The prices are subject to change.


      Products on the online store are ordered by adding them to the shopping cart and by paying them with an online checkout service. All customer information is handled confidentially. Contact information collected during the order process is only used for the delivery of the order, unless otherwise stated. When placing an order you are required to accept the terms and conditions.

      Payment and payment methods

      The online checkout service in use is Paytrail. The payment methods are invoice, installment payment, card payment and payment via online bank.

      By filling your personal information at the checkout you accept the terms and conditions of Paytrail Oyj
      (Paytrail Oyj, Innova 2, Lutakonaukio 7, 40100 Jyväskylä). By clicking "buy" you accept the terms and conditions of Astro Art Store.

      Order and payment confirmation

      After we have received your order we will immediately send you an order confirmation that contains your order information. Always check the content of the order confirmation. If you have questions regarding your order, contact our customer service immediately. Keep the order confirmation in case you need to contact our customer service. Make sure that you have your customer number and order number available when contacting our customer service. Always make sure that the package contents matches the order confirmation.

      You can use the following information to contact our customer service:

      Astro Art Finland
      Sinirinnankatu 18
      FI-50190 Mikkeli

      Telephone: +358442778923
      VAT Number: FI32234856

      Shipping methods and fees

      Shipping fees include shipping and packaging fees. We will present an estimate of the shipping fees in the shopping cart. The exact shipping fees are visible when you have chosen your preferred payment method and shipping method for your order. The available shipping methods vary depending on the products and the combined weight of the products in the shopping cart. 

      Delivery time

      Our most common delivery times to Finland vary depending on the product and delivery method in question. Exceptions to delivery times are stated. We will notify you about the possible delays right after your order.

      We are not responsible for delays caused by force majeure or indirect losses caused by delays. The online store will inform about exceptional delivery times on the website.


      All of our products have at least a 1-year warranty by the manufacturer. Warranty-related issues can be dealt either directly with the manufacturer or with Astro Art Store. 

      Warranty does not apply to faults that have been caused by:

      a) incorrect maintenance, lack of maintenance, or lack of calibration

      b) software, parts, or equipment that have not been delivered by Astro Art Store

      c) unauthorized modifications or misuse of the product

      Return conditions

      You have the right to cancel this agreement within 14 days without declaring the reason. The deadline for canceling this agreement ends 14 days after you have received the last shipment of your order. If the product is downloaded, the deadline for canceling this agreement is 14 days after you have downloaded the product.

      To use your right to cancel, you need to send us an unambiguous notification of your decision (for example by phone or by email). You can also use our printable return form, but it is not required. To comply with the 14-day deadline you need to send the notification before the deadline.

      Use the following contact information to send the notification:

      Astro Art Finland
      Sinirinnankatu 18
      FI-50190 Mikkeli

      Telephone: +358442778923
      VAT Number: FI32234856

      Effects of canceling your order

      If you decide to cancel this agreement, we will return your payment in full, including the shipping costs (only the amount of the cheapest available shipping method). The payment will be returned without a delay, and within 14 days after you have received the cancellation confirmation.

      Return fees are on the responsibility of the customer. The items must be returned to the address of Astro Art Finland with the same method as they have been delivered to the customer. 

      We will return the payment by using the same payment method as the original payment, unless both parties agree otherwise. The payment is returned in a way that the you will not get any extra fees.

      You must send the items back without a delay and within 7 days of receiving the cancellation confirmation. The deadline has been complied with, if you send the items back before the 7-day deadline.

      You are only responsible for such decrease in value of the items that is not caused by handling that necessary to test for operation, features, or functionality of the items.

      Unredeemed package

      Failure to redeem your delivery is not the same as returning or canceling your order. We will charge a fee for unredeemed orders that have not been canceled according to return conditions.

      Problematic situations

      If the item has been lost or damaged during delivery or it does not correspond to your order, you need to use our contact information to inform us within 14 days by mail, email or by phone. The contact information can be found in "Return conditions". If the package has clearly been damaged during shipping, you need to inform the delivery company immediately.