What is the cheapest used Optomax 300mm f/5.5 in the UK?

The cheapest used Optomax 300mm f/5.5 currently listed is £13.99 at eBay, based on 8 listings compared across 2 UK retailers.

How many used Optomax 300mm f/5.5 are for sale in the UK?

There are currently 8 used Optomax 300mm f/5.5 listings available across 2 UK retailers on UsedLens, updated daily.

Is the used Optomax 300mm f/5.5 going up or down in price?

Over the past week the average used price has fallen 1.8%, from £35 to around £35, based on UsedLens daily price tracking across UK retailers.

Used Optomax 300mm f/5.5 for Sale — From £14

£13.99 Low price

£55.00 High price

8 Listings

2 Retailers

3 Reduced

Great for: wildlife sport travel general

Optomax — long preset/auto 300mm f/5.5 telephoto in M42, Olympus OM, Pentax K and Canon FD

The Optomax 300mm f/5.5 was a long telephoto sold through UK dealers in the 1970s as part of the wider Optomax range of Japanese-made lenses. Pentax Forums lists it within a shared optical design also badged as Photax-Paragon, Promura, Kaligar, Hanimar, Exaktar and Eyemik, evidence of common OEM sourcing behind these house brands.

Both manual preset and full 'Auto' diaphragm versions were sold, built around the T2-mount adapter system as well as dedicated fittings; listings confirm M42, Olympus OM, Pentax K and Canon FD examples. Maximum aperture of f/5.5 is modest for the focal length, and close focus is limited by modern standards.

Optically it is a simple, long design rather than a corrected telephoto, so contrast and sharpness fall off toward the frame edges and it is soft wide open; stopping down to around f/8-f/11 improves results. It is long and comparatively light for its focal length, lacking a built-in tripod collar.

Used examples are inexpensive, commonly well under fifty pounds. Check the preset or auto-aperture ring for smooth, click-free travel, inspect the barrel for fungus, and confirm the correct T2 or dedicated-mount adapter is supplied for the intended camera.

Avg £35, down 1.8% over 1 week

Price history ↓

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ProductPriceRetailer

Optomax 300mm f5.5 Manual Focus Lens (m42 MOUNT) ISSUES Fungus (355527e) eBay

£13.99 £23.99

eBay

Optomax 300mm f/5.5 Telephoto Lens - Olympus OM eBay

£19.99

eBay

Auto Optomax 300mm f/5.5 Telephoto Lens, Vintage, M42 Mount eBay

£24.88 £35.28

eBay

Optomax 300mm f5.5 Manual Focus Lens (m42 MOUNT) (360120E) eBay

£33.99

eBay

Optomax 300mm f5.5 lens Telephoto manual focus with Pre set No 354025E Mount M42 eBay

£35.00

eBay

Auto Optomax 300mm f/5.5 telephoto camera lens (OM mount) eBay

£37.09 £52.69

eBay

Auto Optomax 300mm F5.5 Prime Lens M42 Mount refm Inc Case eBay

£48.84

eBay

Optomax 300mm f5.5 Olympus Fit Lens Mr Cad

£55.00

Mr Cad

Used Optomax 300mm f/5.5 price history

Tracking the used Optomax 300mm f/5.5 price? Over the past week, the average has fallen 1.8%, from £35 to around £35. Depending on age and condition, expect to pay between £24 and £40 for a used lens.

Average market price (line) and typical price range (shaded). Source: UsedLens daily price index, 26 Jul – 4 Aug 2026.