# Lens mount adapter K&F Concept Pro M42 to Sony E – KF4345

**URL:** https://aio.lv/en/product--kf-kf4345--11819809
**Data updated:** 2026-03-09 11:07 (EET)
**Category:** Camera Lenses
**Manufacturer:** K&F
**Manufacturer code:** KF4345
**EAN:** 6936069209037
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 31.99 €
**Prices and availability valid until:** 2026-08-27 23:59
**Price without VAT (21%):** 26.44 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kf-kf4345--11819809

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 12.08.2026 | free |
| Pickup points | 17.08.2026 | 1.79 EUR |
| Courier delivery to door | 17.08.2026 | 4.99 EUR |

## Summary description

K&F Concept Pro lens mount adapter KF4345 converts legacy M42 screw-mount lenses for use on Sony E-mount mirrorless cameras. The mechanical adapter provides a secure connection between M42 optics and Sony E bodies while maintaining flange focal distance for manual focus and aperture control. Ideal for photographers who want to use vintage lenses for portrait, landscape, or creative photography on Sony bodies.

## Long description

K&F Concept Pro lens mount adapter M42 to Sony E (KF4345) enables the use of legacy M42 screw-mount lenses on Sony E-mount mirrorless cameras. This mechanical adapter creates a stable, precise physical connection while preserving the correct flange focal distance so that manual focusing and aperture control of the original lens remain predictable. The adapter is suitable for photographers who want to apply vintage optics to portrait, landscape, or experimental photography on modern Sony mirrorless bodies.
Advantages
The adapter provides a rigid, well-aligned interface between M42 lenses and Sony E-mount bodies, minimizing play and ensuring repeatable lens positioning. Its all-mechanical design maintains the optical geometry required for accurate focusing with manual lenses, and the adapter's compact profile keeps the combined setup lightweight and balanced. Constructed from durable materials, it resists wear from repeated lens changes and maintains a secure attachment under normal shooting conditions.
Suitable for
 Using vintage M42 prime lenses on Sony E-mount mirrorless cameras
 Portrait and lifestyle photography with manual-aperture glass
 Landscape and architecture work where unique lens character is desired
 Creative or experimental projects that benefit from classic optical rendering
Key specifications
 Mount conversion: M42 screw mount to Sony E bayonet
 Connection type: mechanical, no electronic contacts
 Material: metal construction for durability and precise fit
 Maintains correct flange focal distance for manual focus compatibility
 Compact, lightweight design that preserves camera handling balance
How to use
Attach an M42 lens by screwing it into the adapter until it is snug; then align the adapter with the Sony E-mount bayonet on the camera body and rotate until it locks in place. Focus and adjust the aperture directly on the lens as required; the adapter does not transmit electronic signals, so autofocus and electronic aperture control are not available. When removing the lens, unlock the adapter from the camera and unscrew the lens from the adapter in a clean environment to avoid dust ingress.
Usage recommendations
Use with manual exposure modes or aperture-priority on Sony cameras and consider enabling focus magnification or focus peaking to assist with precise manual focusing. Clean lens and mount surfaces before attachment and avoid overtightening the screw mount to prevent mechanical stress. Store the adapter in a protective pouch when not in use to preserve its mating surfaces.

## FAQ

### How much does the K&F Concept Pro M42 to Sony E adapter KF4345 cost, and is it available for purchase?

The price is 31.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 60 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 12.08.2026 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 K&F 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 K&F 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/11819809/67222150_large.webp