What is the cheapest used Pentax SMC Pentax-M 40mm f/2.8 in the UK?

The cheapest used Pentax SMC Pentax-M 40mm f/2.8 currently listed is £112.45 at eBay, based on 3 listings compared across 1 UK retailers.

How many used Pentax SMC Pentax-M 40mm f/2.8 are for sale in the UK?

There are currently 3 used Pentax SMC Pentax-M 40mm f/2.8 listings available across 1 UK retailers on UsedLens, updated daily.

What sensor format does the Pentax SMC Pentax-M 40mm f/2.8 use?

The Pentax SMC Pentax-M 40mm f/2.8 features a Full Frame sensor.

Is the used Pentax SMC Pentax-M 40mm f/2.8 going up or down in price?

Over the past month the average used price has fallen 23.9%, from £163 to around £124, based on UsedLens daily price tracking across UK retailers.

Used Pentax SMC Pentax-M 40mm f/2.8 for Sale — From £112

£112.45 Low price

£170.52 High price

3 Listings

1 Retailers

Great for: street general travel

Pentax's classic pancake — the M 40mm f/2.8 that defined compact K-mount.

The SMC Pentax-M 40mm f/2.8 is one of the smallest and flattest SLR lenses ever produced, a true pancake design measuring only 15mm from flange to front element. Part of the compact M series introduced in 1976, the 40mm focal length is a near-normal view slightly wider than the conventional 50mm, and it pairs particularly well with the Pentax ME and ME Super for an ultra-compact manual SLR setup.

40mm focal length, f/2.8 maximum aperture, seven-element SMC (Super Multi Coated) formula, Pentax K bayonet mount, 15mm body depth (pancake), 49mm filter thread.

The defining attribute of the 40mm pancake is its minimal footprint — at 15mm depth it makes any Pentax K body genuinely pocketable. The SMC coating delivers good contrast and flare resistance. The 40mm perspective is slightly wider than a standard 50mm, giving a natural wider framing that suits street and documentary photography. Optically very good from f/4, acceptable at f/2.8.

Inspect all elements for fungus, haze, and coating condition. The very short flange-to-element distance means scratches on the rear element are particularly harmful. Confirm K-mount bayonet tab operates correctly. Aperture blades should be clean and oil-free.

Avg £124, down 23.9% over 1 month

Price history ↓

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ProductPriceRetailer

Pentax 40mm F/2.8 SMC Pancake Manual Focus Pentax-M -fully tested clear lens eBay

£112.45

eBay

SMC Pentax-M 40mm F2.8 PK Pancake Wide Lens Sample Pictures eBay

£123.93

eBay

SMC Pentax-M 40mm f2.8 lens , serviced, very good pancake lens eBay

£170.52

eBay

Used Pentax SMC Pentax-M 40mm f/2.8 price history

Tracking the used Pentax SMC Pentax-M 40mm f/2.8 price? Over the past month, the average has fallen 23.9%, from £163 to around £124. Depending on age and condition, expect to pay between £118 and £147 for a used lens.

Average market price (line) and typical price range (shaded). Source: UsedLens daily price index, 11 Jun – 23 Jul 2026.