# Lens Step-Down Adapter Massa 43mm to 37mm (thread reducer)

**URL:** https://aio.lv/en/product--massa-sb1190--11819614
**Data updated:** 2026-03-09 11:07 (EET)
**Category:** Camera Filters
**Manufacturer:** Massa
**Manufacturer code:** SB1190
**EAN:** 5904647820319
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--massa-sb1190--11819614

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Massa step-down adapter reduces a 43mm filter or lens thread to 37mm, allowing use of smaller 37mm filters, caps or accessories on 43mm lenses. Metal threaded reducer provides a compact mechanical connection for attaching filters, caps or adapters; useful for photographers who need to match filter sizes or protect front elements without replacing equipment.

## Long description

The Massa 43mm to 37mm step-down adapter is a metal thread reducer designed to allow 37mm filters, caps and accessories to be mounted on lenses with a 43mm front thread. This compact adapter preserves the optical alignment and provides a secure mechanical connection between the lens and smaller-diameter screw-in accessories, enabling photographers to use existing 37mm items without changing lenses or buying new filters.
Advantages
The threaded metal construction ensures reliable contact and long-term durability while keeping the adapter slim and lightweight. By reducing a 43mm thread to 37mm, the adapter simplifies equipment compatibility and reduces the need to carry multiple filter sizes. It maintains a low profile to minimize vignetting on wide-angle lenses when used with thin or low-profile accessories.
Suitable for
Attaching 37mm screw-in filters (UV, ND, polarizer) to lenses with 43mm threads
Using 37mm lens caps or protective covers on 43mm lenses
Connecting small accessories such as step-up rings or adapter chains that accept 37mm threads
Key specifications
Material: metal threaded construction for durability
From thread size: 43mm (female mount to lens)
To thread size: 37mm (male mount for filters/accessories)
Type: step-down (thread reducer)
Profile: slim, low-profile design to reduce risk of vignetting with thin accessories
How to use
Screw the adapter into the lens front thread labeled 43mm until it seats firmly but without over-tightening. Then screw the 37mm filter, cap or other accessory onto the adapter’s outer 37mm thread. To remove, reverse the process: unscrew the accessory first, then the adapter from the lens. Check thread directions and use gentle force to avoid cross-threading; if resistance is felt, back off and realign before continuing.
Usage recommendations
For best optical performance, use thin-profile filters where possible to minimize vignetting on wide-angle lenses. Regularly check the adapter and threads for dirt or grit and clean with a soft brush or cloth before mounting. Avoid stacking multiple step-down adapters as this can increase the risk of vignetting and mechanical stress on the lens front.

## FAQ

### How much does the Massa 43mm→37mm Lens Step-Down Adapter cost, and is it available for purchase?

The price is 6.49 € (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 03.07.2026 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 Massa 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 Massa 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/11819614/67221942_large.webp