What is the cheapest used Pentax 100mm f/4 in the UK?

The cheapest used Pentax 100mm f/4 currently listed is £97.68 at eBay, based on 8 listings compared across 4 UK retailers.

How many used Pentax 100mm f/4 are for sale in the UK?

There are currently 8 used Pentax 100mm f/4 listings available across 4 UK retailers on UsedLens, updated daily.

What sensor format does the Pentax 100mm f/4 use?

The Pentax 100mm f/4 features a Full Frame sensor.

Is the used Pentax 100mm f/4 going up or down in price?

Over the past two weeks the average used price has held steady at around £124, based on UsedLens daily price tracking across UK retailers.

Used Pentax 100mm f/4 for Sale — From £98

£97.68 Low price

£149.00 High price

8 Listings

4 Retailers

1 Reduced

Great for: portrait general

Manual focus prime lens for Pentax K-mount cameras.

The Pentax 100mm f/4 is a short telephoto lens for the Pentax K mount, covering portrait and documentary telephoto work. Without a Macro or Soft designation, this is likely the SMC Pentax-M 100mm f/4 standard telephoto from the compact M-series range.

100mm focal length, f/4 maximum aperture, Pentax K bayonet mount, likely SMC Pentax-M series compact design.

The 100mm f/4 provides a moderate telephoto perspective useful for portraits, details, and light documentary photography. The f/4 maximum aperture is modest but delivers good image quality. Compatible with all Pentax K-mount cameras.

Inspect for fungus, haze, and coating condition. Confirm K-mount engagement. Check aperture blades. Test focus helicoid smoothness.

Avg £124, steady over 2 weeks

Price history ↓

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ProductPriceRetailer

Pentax 100mm F/4 SMC Dental Macro Manual Focus Lens PK Mount + Case - Excellent eBay

£97.68 £108.08

eBay

Pentax 100mm F4 (Pentax Fit- Manual Focus) York Camera Mart

£99.00

York Camera Mart

Pentax PK 100mm f4 Macro Very Good London Camera Exchange

£99.99

London Camera Exchange

**PENTAX TAKUMAR 100mm F/4 SUPER MULTI-COATED MACRO LENS M42 SCREW MOUNT** eBay

£117.99

eBay

Pentax 100mm F/4 SMC Macro Manual Focus Lens PK Mount - Excellent eBay

£144.95

eBay

Pentax 100mm f4 SMC PKM fit Lens Mr Cad

£149.00

Mr Cad

Asahpi Pentax 100mm f4 SMC Macro ES Screw Fitting Lens Mr Cad

£149.00

Mr Cad

Pentax 100mm f4 Macro PK Fitting Lens Mr Cad

£149.00

Mr Cad

Used Pentax 100mm f/4 price history

Tracking the used Pentax 100mm f/4 price? Over the past two weeks, the average has held steady at around £124. Depending on age and condition, expect to pay between £99 and £149 for a used lens.

Average market price (line) and typical price range (shaded). Source: UsedLens daily price index, 11 Jun – 2 Jul 2026.