# Lens Mount Adapter Pixco: Canon EOS R (RF) to Pentax K — mechanical adapter

**URL:** https://aio.lv/en/product--pixco-sb4840--11819702
**Data updated:** 2026-03-09 11:07 (EET)
**Category:** Camera Lenses
**Manufacturer:** Pixco
**Manufacturer code:** SB4840
**EAN:** 5904647821347
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 49.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 41.31 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--pixco-sb4840--11819702

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Mechanical lens mount adapter by Pixco to mount Canon EOS R (RF) lenses onto Pentax K camera bodies. Allows physical connection of RF-mount lenses to K-mount cameras while maintaining manual control of aperture and focus where lens permits. Suited for photographers who want to use RF glass on Pentax bodies for creative or compatibility purposes. No electronic communication or AF unless specified by separate models.

## Long description

Mechanical lens mount adapter by Pixco designed to allow Canon EOS R (RF) lenses to be physically attached to Pentax K camera bodies. This adapter provides a rigid mechanical connection between RF-mount optics and K-mount cameras, enabling the use of a wide range of RF lenses on Pentax systems. The adapter does not provide electronic communication, so aperture control and focusing are manual when the lens supports those operations mechanically.
Advantages
The adapter offers a solid metal construction that ensures stable lens-to-body alignment and reliable repeatable mounting. By enabling compatibility between Canon EOS R (RF) lenses and Pentax K bodies, it expands creative options for photographers who already own RF glass or wish to experiment with different optical characteristics. The purely mechanical design avoids potential software conflicts and maintains full manual control over focus and aperture where the lens allows.
Suitable for
 Photographers who want to use Canon EOS R (RF) lenses on Pentax K-mount cameras
 Manual-focus work such as portrait, landscape, and macro photography
 Adaptation for vintage or specialty RF lenses without electronic interfaces
 Studio and controlled-environment shoots where manual aperture and focus are acceptable
Key specifications
 Mount conversion: Canon EOS R (RF) lens to Pentax K camera body
 Type: mechanical (no electronic contacts or signal transmission)
 Material: metal alloy construction for durability and stable fit
 Finish: precision-machined mating surfaces to minimize play and tilt
 Weight: compact and lightweight design for easy handling on camera rigs
 Optical effect: retains original lens optical properties; no optics or glass elements included
How to use
Align the red/white alignment marks on the adapter with the corresponding mark on the RF lens, attach the lens by rotating until it clicks into place, then mount the adapter-lens assembly onto the Pentax K camera and secure it with the camera's mount locking mechanism. Set the camera to manual exposure or use aperture-priority modes while controlling aperture and focus directly on the lens. Confirm the mechanical fit and check for any light leaks or looseness before shooting. Because there is no electronic communication, EXIF lens data and autofocus are not available; use focus aids such as focus peaking or magnification if your camera supports them.
Usage recommendations
For best results, use lenses that offer a manual aperture ring or mechanical iris control. When composing critical images, use a tripod and mirror-up or electronic front curtain shutter if available to reduce vibration. Test each lens on your camera to verify infinity focus and framing, and be mindful of potential vignetting or reduced image quality at wide apertures due to flange distance adaptation.

## FAQ

### How much does the Pixco Canon EOS R (RF) to Pentax K Adapter cost, and is it available for purchase?

The price is 49.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 02.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Pixco products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Pixco service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11819702/67222036_large.webp