# Lens mount adapter K&F Concept M42 to Sony E – mechanical adapter for M42 lenses on Sony E-mount cameras

**URL:** https://aio.lv/en/product--kf-kf4444--11819641
**Data updated:** 2026-03-03 16:20 (EET)
**Category:** Other goods
**Manufacturer:** K&F
**Manufacturer code:** KF4444
**EAN:** 6936069221916
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 26.49 €
**Prices and availability valid until:** 2026-08-03 23:59
**Price without VAT (21%):** 21.89 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kf-kf4444--11819641

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

Mechanical lens mount adapter by K&F Concept for mounting M42 screw-mount lenses on Sony E-mount mirrorless cameras. The adapter preserves optical alignment and flange distance to enable manual focus and aperture control of vintage M42 lenses on modern Sony bodies. Useful for photographers who want to use legacy glass, macro, portrait, or experimental optics with Sony E cameras.

## Long description

The K&F Concept M42 to Sony E mechanical lens mount adapter allows photographers to attach M42 screw-mount lenses to Sony E‑mount mirrorless cameras while preserving optical alignment and the correct flange focal distance. This adapter is designed for manual operation: it provides a secure mechanical connection between vintage M42 lenses and modern Sony bodies so that focus and aperture can be controlled directly on the lens. The adapter contains no optical elements and maintains the native imaging characteristics of the attached lens.
Advantages
The adapter enables the use of legacy M42 glass on Sony E cameras without altering lens optics, supporting creative reuse of manual-focus lenses. Because it is a mechanical adapter with no electronic contacts or built-in optics, it preserves the original rendering, bokeh and optical imperfections of the lens. The adapter provides a stable physical connection and corrects the flange distance so infinity focus and accurate focus calibration are maintained when the lens is mounted on Sony E bodies.
Suitable for
 Mounting vintage M42 screw-mount lenses on Sony E‑mount mirrorless cameras
 Portrait, macro and experimental photography using manual-focus lenses
 Photographers restoring or repurposing legacy optics for digital use
Key specifications
 Adapter type: mechanical mount adapter (no optical elements)
 From mount: M42 screw mount (M42x1)
 To mount: Sony E‑mount (for mirrorless cameras)
 Function: preserves flange focal distance and optical alignment for accurate focusing
 Operation: manual focus and manual aperture control via lens
How to use
To use the adapter, screw the M42 lens onto the adapter’s M42 thread until secure, then align the adapter with the Sony E‑mount bayonet and rotate until it locks into place. Set the camera to allow use of manual lenses (manual focus mode or MF setting) and use focus magnification or focus peaking if available for precise focusing. Aperture control is performed on the mounted lens if it has an aperture ring; if the lens has no aperture ring, the lens will operate at its default aperture or require a lens-specific method to stop down.
Usage recommendations
Check focus performance and infinity focus after mounting, especially when using older or modified lenses. Use live view with focus assist features on Sony E cameras for accurate manual focusing. When shooting in bright conditions, consider using a lens hood or shading to reduce flare from adapted lenses that lack modern coatings.

## FAQ

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

The price is 26.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 30 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 23.07.2026 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 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/11819641/67221975_large.webp