CameraWorth.com

Mamiya M645J

The Mamiya M645J is a medium format SLR that exposes 6x4.5cm frames on 120 and 220 roll film. It was positioned as a simplified, lower-cost entry point into the Mamiya 645 system, using the same bayonet mount as the rest of the M645 line and accepting Sekor C lenses.

At recent UK auction, hammer prices for the M645J have ranged from about £81 to £310, with a median close to £220 — wholesale saleroom results rather than dealer retail. As of 2026 the body remains one of the more affordable ways into 6x4.5 shooting, and what a given example sells for is driven largely by cosmetic condition, working shutter speeds, and whether a lens and finder are included.

I have one to sell

Sales History

Prices shown are UK auction hammer results — the wholesale level achieved in the saleroom. Neither buyer’s nor seller’s commission is included. Dealer and retail asking prices are typically higher.

Prices updated: May 2025

Date Price Source
May 2025 £220 Special Auction Services
Apr 2024 £210 Special Auction Services
Jun 2023 £290 Special Auction Services
Apr 2023 £312 Flints Auctions
Mar 2023 £81 Flints Auctions

Frequently asked questions

What is a Mamiya M645J worth today?

Recent UK auction hammer prices place the value between roughly £81 and £310, with a median around £220 for a body in working order.

How much does a Mamiya M645J sell for with a lens?

Auction results for bodies bundled with a standard Sekor C lens tend to sit in the upper part of the observed £81–£310 range, while bare or faulty bodies sell for less.

Is the M645J the same as the standard M645?

No — the J is a simplified variant of the M645 line, which is why its price at saleroom level is typically lower than a fully equipped M645 1000S.

In this series

Other Mamiya cameras