Take Control of Your Digital Life with Mylio Photos: Try It; Itís FREE

Asahi Pentax Super-Takumar 50mm f/1.4 Model I (8-Element) Vintage Lens Review

John Riley reviews the Asahi Pentax Super-Takumar 50mm f/1.4 Model I (8-Element), and finds out if the lens deserves the legendary status it has.

| Pentax Super Takumar 50mm f/1.4 in Vintage Lenses
BUY NOW PENTAX Super Takumar 50mm f/1.4

Handling and Features

Asahi Pentax Super-Takumar 50mm f/1.4 Model I (8-Element) Vintage Lens Review: Super Takumar 50mm F1,4 8 Element Front Oblique View

Some lenses do gain a legendary status, and the Model I Super-Takumar 50mm f/1.4 is one of them. The first claim to fame is the use of radioactive Thorium glass, the second is that this first model of 8 elements was soon replaced by a 7 element version and the Model I became the stuff of legends for its extraordinary performance. Manufactured from 1964-1965 we can now have a close look to see how it performs using the Pentax K-1 DSLR. Will the 36MP digital images have that same magic about them? Let's find out.


One image can change us.

A picture, a moment can change the way we feel. Change how we see ourselves. Change our understanding and change the rules. Provoke and change history.

MPB Gear

MPB puts photo and video kit into more hands, more sustainably. Every month, visual storytellers sell more than 20,000 cameras and lenses to MPB. Choose used and get affordable access to kit that doesnít cost the earth.

Sell the kit youíre not using to MPB. Trade in for the kit you need to create. Buy used, spend less and get more.

Buy. Sell. Trade. Create.

MPB Start Shopping

Asahi Super-Takumar 50mm f/1.4 Model I Handling and Features

Asahi Pentax Super-Takumar 50mm f/1.4 Model I (8-Element) Vintage Lens Review: Super Takumar 50mm F1,4 8 Element On Pentax K 1

Introduced along with the then-new Pentax Spotmatic, this lens has a small caveat attached to its use on early film cameras. It can only be used on pre-Spotmatic S1a/H1a and SV/H3v film bodies that have the new crescent shaped push plate to activate the stop down pin. The appropriate cameras will usually have a 7-digit serial number and an orange R on the rewind crank. This is because the rear element protrudes and can foul the mechanism of earlier film bodies. Having baffled us DSLR users though, we need have no such fears as our cameras have moved on somewhat.

The screw thread lens mount is devoid of electronic contacts and an adapter is needed to fit the lens to our selected DSLR camera body. Screw thread lenses can be fitted via an adapter to almost any camera, but here we have the Pentax K-1 and the ideal is the Pentax manufactured Adapter K. This fits inside the camera bayonet mount. The technique is to fit the adapter to the lens and then bayonet onto the camera. The lens can then be unscrewed and another fitted if desired, effectively temporarily converting a K mount camera body into a screw thread one. The adapter is removed by operating a small lever on the adapter and letting it fall out into the palm of a hand.

Having mounted the lens, our brief tour starts at the large front element and the 49mm filter thread. Whereas the push on metal lens cap can be partially pushed off when some of the smaller aperture lenses are used, the f/1.4 version has no such problem.

The focusing ring is sculpted for grip, and the sheer pleasure of operating the focusing mechanism brings new meaning to the phrase silky smooth. This particular sample has not worn totally evenly, having a stiffer section in its travel, but the point holds good for most of these lenses. Distance markings in feet and metres are viewed in a cutout on the lens barrel, and there is a useful depth of field scale. There is also an infra-red focusing mark to show the revised distances necessary when using IR film.

The aperture ring has half stop indents and is smooth in operation, running from f/2 to f/11. The stop to the widest, f/1.4, and smallest, f/16, apertures is a full stop, with no half stop indent. Behind this is the Auto/Manual switch which selects between open aperture and closed down aperture. This is very useful for DSLR metering as set to Auto the diaphragm opens to maximum aperture and focusing is easier. The beep of the K-1 focus confirmation is an added guide to getting the focus spot on. For this to work the camera should be set to AF. When we are ready to shoot the image moving the lever to Manual will stop the lens down to whatever value we have selected. The alternative technique is to leave the switch on Manual and just use the aperture ring to open the lens up, then count down the steps to set whatever working aperture is desired. It should be noted that some A/M levers will only work when the lens is mounted on the camera, so one that is solidly fixed may not indicate a fault. In this case the lens is early enough to have no additional levers on the mount, so use is perfectly straightforward.

Asahi Pentax Super-Takumar 50mm f/1.4 Model I (8-Element) Vintage Lens Review: Super Takumar 50mm F1,4 8 Element With Hood On Pentax K 1

The optical construction is 8 elements in 7 groups. Focusing is down to a conventional 0.45m or 1.5 feet and the lens weighs in at 245g.

In the context of 1964, handling of the Super-Takumar lenses is sublime. They focus closer than many, have super-smooth controls, are compact and have an elegance of design that makes many contemporaries look very clunky in comparison. In the context of 2018 and a DSLR, manual focus is what it is and will suit some and not others, but otherwise the lens is still quite beautiful to use. There is a certain pleasure to be experienced in such elegance of engineering, design and fine quality of manufacture.

Asahi Pentax Super-Takumar 50mm f/1.4 Model I (8-Element) Vintage Lens Review: Super Takumar 50mm F1,4 8 Element Rear Oblique View

Asahi Super-Takumar 50mm f/1.4 Model I Performance

In 1964, the design ethos of an f/1.4 lens was somewhat different to today. As a consequence, we might expect that wide open the lens may not be razor sharp, but it will be when stopped down. Using Imatest, sharpness centrally is simply very good all the way through the apertures. The edges are also very good and virtually matching the centre from f/2.8 to f/16. However, at f/1.4 the edges are ethereally soft and likewise at f/2, although gradually sharpening. Critical sharpness clicks in at f/2.8. This means that we have the possibility of some truly wonderful bokeh effects at the two widest apertures, and does bear out the reputation of the lens as being something special in a creative sense. Portrait photographers might see huge benefits in this design choice.

Pentax Super Takumar 50mm f/1.4 MTF Charts

How to read our MTF charts

The blue column represents readings from the centre of the picture frame at the various apertures and the green is from the edges.

The scale on the left side is an indication of actual image resolution as LW/PH and is described in detail above. The taller the column, the better the lens performance.

For this review, the lens was tested on a Pentax K-1 using Imatest.


CA (Chromatic Aberration) is very well controlled, almost banished centrally and still kept to very low values at the edge. One of the minor surprises of doing these vintage reviews is finding that CA was much better corrected for than anticipated.

Pentax Super Takumar 50mm f/1.4 Chromatic Aberration Charts

How to read our CA charts

Chromatic aberration (CA) is the lens' inability to focus on the sensor or film all colours of visible light at the same point. Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. It can be cured in software.

Apochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimize the problem, hence they usually cost more.

For this review, the lens was tested on a Pentax K-1 using Imatest.


Distortion measures -1.52% barrel, a very good result and not likely to be a problem.

Bokeh is very, very smooth and here the qualities of the lens shine through. We end up with a lens that indeed produces a “look”, a delightfully vague term but one that can be very easily understood when the results are seen.

The conventional coating does mean that use of a lens hood is advisable, as flare can intrude on images unless care is taken. It is, however, no worse than any other quality lens of the period and does not prevent the making of some great images.

Pentax Super Takumar 50mm f/1.4 Sample Photos


Pentax Super Takumar 50mm f/1.4 Aperture range


Asahi Super-Takumar 50mm f/1.4 Model I Verdict

If one of these can be found, its status and reputation unfortunately means that the price will be higher. It may also be inflated by the collectors market. What a fair price would be is something for debate, but if a good sample can be found at a price that seems acceptable to the buyer, then it will be an excellent lens to own. And, hopefully, to use.

Does it have a special quality? Yes, it probably does. There needs to be a longer period to explore the possibilities, but in this short review period the lens has certainly delivered. Without doubt there will be a pang of regret when it has to go back, which does indicate that this journey of discovery was worth the effort.

Asahi Super-Takumar 50mm f/1.4 Pros

  • Excellent overall performance
  • Lovely bokeh
  • Beautifully and elegantly engineered
  • Legendary status
  • Intuitive ergonomics

Asahi Super-Takumar 50mm f/1.4 Cons

  • Manual focus won't suit some
  • Potentially inflated price as a collectable

Overall Verdict

Own this lens? Let us know what you think of it in the EQDB

Pentax Super Takumar 50mm f/1.4 Specifications

Lens Mounts
  • Pentax K
Focal Length50mm
Angle of ViewNo Data
Max Aperturef/1.4
Min Aperturef/16
Filter Size49mm
35mm equivalentNo Data
Internal focusingNo Data
Maximum magnificationNo Data
Min Focus45cm
BladesNo Data
Box Contents
Box ContentsNo Data
HeightNo Data

View Full Product Details

Spotted a mistake? Let us know in the EQDB.

Buy Now

Amazon UK Logo

We don't have the latest price however the link below will take you to the most relevant items.

Pentax Super Takumar 50mm f/1.4 SEARCH
Amazon US Logo

We don't have the latest price however the link below will take you to the most relevant items.

Pentax Super Takumar 50mm f/1.4 SEARCH
MPB Logo

We transform the way that people buy, sell and trade in photo and video kit.


Support this site by making a Donation, purchasing Plus Membership, or shopping with one of our affiliates: Amazon UK, Amazon US, Amazon CA, ebay UK, MPB. It doesn't cost you anything extra when you use these links, but it does support the site, helping keep ePHOTOzine free to use, thank you.


Other articles you might find interesting...

Minolta AF 28mm F/2 Vintage Lens Review
Minolta AF 50mm F/1.4 With K & F Concept A To E Mount Manual...
SMC Pentax-FA 24-90mm f/3.5-4.5 AL [IF] Lens Review
Tokina SZ-X SD 28-105mm f/4-5.3 Vintage Lens Review
Tair 3C 300mm F/4.5 Vintage Lens Review
Olympus Zuiko 75-150mm F/4 Vintage Lens Review
Sigma AF APO Tele Macro 400mm F/5.6 Vintage Lens Review
SMC Pentax-FA 70-200mm f/4-5.6 Power Zoom Vintage Lens Review


Thomas_P Avatar
16 May 2018 3:43AM
Wooow, Takumar reviews, that's really great. Who else is doing MTF tests on vintage lenses nowadays... Looking forward to seeing these interesting and helpful tests on more Takumar lenses! As well as other brands!
Maybe one of the 85mm Takumar's and 35mm.
Thanks for the great work!
liukaitc Avatar
18 May 2018 3:42AM
is the f1.4 and f2 image the same shots? I see no exposure setting change. and the bokeh looks same size.
johnriley1uk Avatar
18 May 2018 8:46AM
I can see a distinct difference on my screen between f/1.4 and f/2.
Its_Fozzy Avatar
Its_Fozzy 9 19 United Kingdom
23 May 2018 12:07PM
As Thomas_P said, it's great to see a modern review of an old lens. However, I have to point out that this 8 element version is not radioactive, that claim to infamy goes to the second version onwards. The thorium element was introduced for the second version as a cost cutting exercise, when they wanted to reduce the number of elements from eight to seven, and by using thorium, they were able to replicate the image quality of original lens with one element less. I doubt anyone has done an MTF comparison between the different versions. Food for thought?

If it is of any interest, we talk about the subject in episode 3 of the Classic Lenses Podcast.
stevenmichael Avatar
I don't like the fact that pentax changed the elements of the lens after they got the award for best lens and they didn't tell the buyers they changed the lens . They lead people to believe they were getting the award winning lens . Pentax admitted they lost money on every 8 element lens they produced and they stop making it the day after they got the award .
jameswburke Avatar
jameswburke 21 16 Ireland
14 Jan 2020 11:59AM
I've been trying my old Pentax manual lenses on my Canon 5D bodies for a while now. They are sharp, lightweight and give a more 3D look to images. I recently bought a vintage 50mm f4 Macro which is my carry-around lens now. The lens is set deep in the body so no flare. I've also been using a lovely 50mm f1.7 Pentax SMC lens which I got with my Pentax ME Super, way back in 1982 - a lovely lens with very nice bokeh. All these lenses require manual exposure and focus but that shouldn't be an obstacle. If you want excellent lenses at budget prices with a retro look for your pics then Pentax SMC lenses are perfect. See my recent Insta pics using these lenses:
bobrapp Avatar
24 Jan 2023 10:58PM
My first camera was a Spotmatic I purchased in 68 with the SMC 55 f1.8. I bought a used 50mm ST 50 f1.4 shortly after. several years later, I was shooting Basketball for the Utah Stars of the ABA. In preparation, I optimized my film development and selected Acufine as my developer for Tri-X. I used the 50mm almost exclusively and added a SMCT 35 f2 later. I was able to shoot at f2.8 and 1/250th. At the time, I was very happy with my prints. during that period, all my photo gear was stolen, including my Hasselblad. I repurchased a Spotmatic II, SMCT 50 f1.4 and 35 f2. The results from the 50 was no match compared to the old.

Only later did I learn there was an earlier 8-element version and have been wondering ever since. Last year, I bought a K1 II and started checking out my older lenses. I have quite an assortment of Takumars and have 2 of these 8-element 50mm. I was astounded at how sharp they were across the frame from f2.8 on.

This review confirms my suspicions, this 8-element Super Takumar is probably the sharpest lens of that period and the 55mm f1.8 is almost as good.

You must be a member to leave a comment.

ePHOTOzine, the web's friendliest photography community.

Join for free

Upload photos, chat with photographers, win prizes and much more.