# Lens adapter BIG Adapter M42 421338 for Canon EF mount

**URL:** https://aio.lv/en/product--big-421338--1897084
**Data updated:** 2025-12-29 07:53 (EET)
**Category:** Camera Lenses
**Manufacturer:** BIG
**Manufacturer code:** 421338
**EAN:** 4501914213389
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 23.99 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 19.83 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--big-421338--1897084

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 19.06.2026 | free |
| Pickup points | 26.06.2026 | 1.99 EUR |
| Courier delivery to door | 26.06.2026 | 4.99 EUR |

## Summary description

BIG Adapter M42 421338 is a mechanical lens adapter that allows M42-mount lenses to be mounted on Canon EF mount cameras. It provides a secure physical connection without electronic contacts, retaining manual aperture and focus control. Suitable for adapting vintage M42 lenses for photography and video on Canon EF bodies, offering compatibility and creative use of legacy glass.

## Long description

BIG Adapter M42 421338 is a mechanical lens adapter that enables mounting interchangeable M42-threaded lenses on Canon EF and EF-S bayonet cameras. The adapter provides a stable, purely mechanical connection without electronic contacts, preserving manual focus and aperture control of the attached lens for use with Canon EF-mount bodies.
Advantages
The adapter offers secure physical mounting between M42 lenses and Canon EF/EF-S bodies while maintaining full manual operation of aperture and focus. Its simple mechanical design ensures broad compatibility with vintage and modern M42 lenses and requires no power or electronic communication. The adapter is lightweight and compact, facilitating easy attachment and removal.
Suitable for
Photographers using vintage M42 lenses on Canon EF or EF-S cameras
Videographers who need manual aperture and focus control with legacy glass
Users who want to experiment with unique optical characteristics of classic lenses
Adaptation of interchangeable M42 threaded lenses to Canon EOS bodies
Key specifications
Model: BIG Adapter M42 421338
Mount A (lens side): M42 screw thread
Mount B (camera side): Canon EF/EF-S bayonet
Connection type: Mechanical only, no electronic contacts
Compatibility: M42 lenses to Canon EF and EF-S mount cameras
MPN: 421338
EAN: 4501914213389
How to use
Attach the M42 lens to the adapter by screwing the lens into the M42 thread until secure. Align the adapter's Canon EF bayonet with the camera's mount, then rotate until it locks into place. Use the lens's manual focus and aperture ring to control focus and exposure. To remove, press the camera’s lens release button and rotate the adapter off the camera mount, then unscrew the lens from the adapter.
Usage recommendations
Because the adapter has no electronic contacts, enable manual exposure or use aperture-priority modes as appropriate; metering and EXIF data may be limited. Check flange focal distance and focus to infinity with your lens—some M42 lenses require micro-adjustment or may not achieve infinity focus on certain camera bodies. Handle threads carefully to avoid cross-threading when attaching or detaching the lens.

## FAQ

### How much does the BIG Adapter M42 421338 for Canon EF cost, and is it available for purchase?

The price is 23.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 19.06.2026 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 BIG 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 BIG 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/1897084/51135003_large.webp