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SMC Pentax 28mm F2

Reviews Views Date of last review
17 124,882 Sat July 27, 2019
Recommended By Average Price Average User Rating
100% of reviewers $561.36 9.71
SMC Pentax 28mm F2

The fast Pentax K 28mm F2 is a one-of-a-kind lens. Future M and A series 28mm F2 offerings were made much smaller but had a different optical formula.

SMC Pentax 28mm F2
©, sharable with attribution
Image Format
Full-frame / 35mm film
Lens Mount
Pentax K
Aperture Ring
Yes (no A setting)
Automatic, 6 blades
9 elements, 8 groups
Mount Variant
Check camera compatibility
Max. Aperture
Min. Aperture
Min. Focus
25 cm
Max. Magnification
Filter Size
52 mm
Internal Focus
Field of View (Diag. / Horiz.)

APS-C: 55 ° / 46 °
Full frame: 75 ° / 65 °
PH-S52 (24mm)
Dedicated hard case
Lens Cap
Plastic clip-on
Weather Sealing
Other Features
Diam x Length
62.5 x 69 mm
423 g
Production Years
1976 to 1981
Engraved Name
SMC PENTAX 1:2/28 (early variant) or smc PENTAX 1:2 28mm (later variant)
Product Code
User reviews
Two variants were produced. The only difference appears to be in the engraved name:
SMC PENTAX 1:2/28 (early variant),
smc PENTAX 1:2 28mm (later variant)
Manual FocusAperture RingFull-Frame SupportDiscontinued
Price History:

Add Review of SMC Pentax 28mm F2
Sort Reviews by: Date | Author | Rating | Recommendation | Likes (Descending) Showing Reviews 1-15 of 17

Registered: July, 2011
Posts: 1,615
Lens Review Date: July 27, 2019 I can recommend this lens: Yes | Price: N/A | Rating: 10 

Pros: Rendering
Cons: Not fully compatible with new camers
Sharpness: 9    Aberrations: 8    Bokeh: 9    Handling: 4    Value: 9    Camera Used: K1ii   

The Hollywood is very special design based on Pentax/Zeiss cooperation. Large aperture wide angle with quite decent sharpness and great 3D pop. Aperture produces a star with 6 rays - nice.
Handling with green button program and live view focusing is tricky, but you get used to it.
A mint Hollywood costs you as much as new ZK 28. Only the old Zeiss and the old Pentax share the great rendering. Special purpose lens for fun. Sharpness is not as bitingly as D-FA 50, color rendering is different to modern Pentax designs.
Junior Member

Registered: November, 2008
Location: South Florida, USA
Posts: 39
Lens Review Date: June 26, 2018 I can recommend this lens: Yes | Price: $300.00 | Rating: 9 

Pros: sharp, linear, contrasty, smooth focus, rendering
Cons: rare, expensive, heavy
Sharpness: 9    Aberrations: 9    Bokeh: 8    Handling: 8    Value: 8    Camera Used: istDS   

Got this lens at a great price as part of a large package deal. While I haven't tried it on film or FF digial, on crop digital it is amazing.
Gobs of sharpness, contrast, and color saturation. Only drawback is its rare and expensive, but if you can find one at a good price,
jump on it you wont regret it. [url=""][img]
Veteran Member

Registered: November, 2009
Location: Strand
Posts: 1,366

1 user found this helpful
Lens Review Date: January 2, 2017 I can recommend this lens: Yes | Price: $800.00 | Rating: 10 

Pros: 3D, wide
Cons: Some what heavy
Sharpness: 9    Aberrations: 9    Bokeh: 9    Handling: 10    Value: 10   

Technical and history:

Recommend to use on full frame sensor bodies.
An awesome lens!
New Member

Registered: May, 2016
Posts: 12

2 users found this helpful
Lens Review Date: May 31, 2016 I can recommend this lens: Yes | Price: N/A | Rating: 10 

Pros: sharpness, bokeh, colour differentiation
Cons: expensive, big, heavy
Sharpness: 10    Aberrations: 9    Bokeh: 10    Handling: 7    Value: 10    Camera Used: anything between K2 and K-3   

Not much to add here... one of the greatest Pentax lenses ever.
Back in film days pictures taken with this lens on fine grain material generally looked like medium format. It was a step ahead of any other wide angle lens. Modern lenses with their aggressive micro contrast will easily let you think they are better. But no, go to the pixel level and you will see the 2/28 has it all even today. Add its dreamy bokeh, its incredible ability to diffentiate colour shades, its perfectly laid-back slightly greyish colour rendering... and you're done and addicted
On the K-3 I actually mostly use it for video shooting. AF is not needed, instead you are thrilled by the large, smooth, super-silent focus ring... Leave the aperture wide open and play with the pretty small DOF. You get razor-sharp, movie-like pictures with a beautiful stress-free creamy background.
Site Supporter

Registered: June, 2008
Location: Florida Hill Country
Posts: 17,297
Lens Review Date: April 1, 2015 I can recommend this lens: Yes | Price: N/A | Rating: 10 

Pros: Excellent performance and fast
Sharpness: 10    Aberrations: 9    Bokeh: 10    Handling: 10    Value: 9   

Contrary to what the description says, this lens was NOT produced as an M or A series. Those lenses are completely different optically. They are also more compact.

This lens is a jewel performance wise and speed wise. I think it is the best 28mm or 35mm manual focus lens Asahi Optical/Pentax ever made. This lens is good to pair with the K50/1.2 or A50/1.2.
New Member

Registered: December, 2014
Location: Samara
Posts: 3

3 users found this helpful
Lens Review Date: December 6, 2014 I can recommend this lens: Yes | Price: $750.00 | Rating: 10 

Pros: Fast, sharp, colour, contrast, low distortion, low CA
Cons: Rare lens, rare original hood.
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 10    Value: 9    Camera Used: K-5   

1) Excellent sharpness, starting with an open aperture, focusing on all bands from the MDF to infinity. I was particularly struck by the high detail in the "infinity".

2) Almost no chromatic aberration at any aperture. Even at full aperture in the contrasting image areas CA can only be seen under high magnification (very slight purple fringing, and then not always).

3) Good holds backlight (including the open - especially tried), a side appear highly visible illumination and glare. Hood needed. Unfortunately, with my purchase when not supplied: ((((clip-on hood: PH-S52 wide angle) Can someone tell me where to find the original? I would greatly appreciate ...

4) Excellent color rendition and contrast (around 43 Limited Pentax (which for some reason is immediately asked for a comparison) only wider angle). 3D-images (lightness, transparency (like the pictures Voigtlander APO lanthar 125mm), volume - only words can not convey) when shooting at close range.

5) I do not know how to FF, not is vignetting.

6) Geometric distortion is, but insignificant for such a focus (at least for me )).

7) excellent bokeh - so far only good impressions (uniform Gaussian blur, calm, do not strain)

8) Weight: 420 g, which is pretty hard for wide angle lens for K version (and other versions, too). Not easy ... but not heavy. In conjunction with the Pentax K-5 is quite a nothing. Very convenient to use. The focusing ring is very broad, the course of about 90 degrees.

9) The aperture value half-stop, only after F16 immediately follows F22. Aperture 16 and 22 as workers (currently significant flaws did not see)

10) MDF of 25 cm.

11) Tactile sensations - and they had not been canceled ))


There are disadvantages as well as without them ...

1) It is very rare and expensive, comparable in price with the Zeiss 28/2 ZK (although a little !!! less at the present moment, and in fact the lens end of the 70s). However, after seeing it on Ebay (quite by accident), without hesitation bought and while I do not regret.

2) A short course of the focus ring (90 degrees), but it used to (before similar wide angle lens was not). At close range is not convenient to use (of course, this applies to the aperture open and close to them), especially in dynamic shooting (these are children in the first place, and of all sorts of pets).

3) Shooting mode only M, the focus at full aperture, metering by clicking the "green" button (Pentax K-5) is calculated on the Aperture installed on the ring at the time of the shooting aperture closes to working. Those that are closer to infinity - no problem - aperture 8-11 and the focus ring to the end position and go!).

4) Blend - well, really need. I would like to the original, but hard to find.

5) This was originally planned to take Zeiss 28/2 ZK (new), and he has nine petals and auto iris (with the ability to shoot in aperture priority and with a record of its value in the Exif file + outbreak in the machine). We Pentax K 28/2 only 6 aperture blades and there is no provision And Nevertheless, the difference between 6 and 9 petals in bokeh do not see (compare test shots from the Internet). Only the lights during night shooting 6-rays here until all the difference ..


Originally formed an ambiguous impression .. Quite peculiar lens (although objectively)), does not compare with anything - before I wide angle lens fixes were not, well, just Summilux-R 35). For its size pretty big for wide angle lens (closer rather to telephoto), but, nevertheless, still compact at the same time on the body Pentax K-5 (here's the paradox!), comparable with the whale 18-55 in length, even a little shorter. The picture on the MDF and is very close to bulk, beautiful, air, free from any defects. Distortion is only visible to specific images. In landscapes have not tried - the weather is not very much and have nothing to shoot.

P.S. Sorry for my english)
P.P.S. Must have !

Registered: June, 2013
Location: Newcastle
Posts: 1,954

3 users found this helpful
Lens Review Date: June 21, 2014 I can recommend this lens: Yes | Price: $850.00 | Rating: 10 

Pros: sharpness, colour, contrast, low aberrations
Cons: none
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 10    Value: 10    Camera Used: K5   

OK I have rated this lens a 10 and some say no lens can be rated that high. According to the pentaxforums guide this means the lens is supernatural - well I can't say it isn't.

It is fully manual being a K series lens. So green button metering required. Minor inconvenience but necessary for legendary legacy glass.

Colours are simply unbelievable. Beautiful saturation and hue, it is as you see it with a touch of additional vibrance. Contrast is excellent but a hood is required. You will suffer significantly reduced contrast if the hood is missing - again a minor annoyance. Sharpness is simply stunning, especially in the sweet spot between f8 and f11. Aberrations are very well controlled - never bothered me yet. Bokeh is as expected for a zeiss like lens. Handling ...... some say it is heavy ...... I say it balances the body perfectly. Focusing is buttery smooth and precise just like a Takumar ....... oooh and aren't they are nice to focus.

Price. Well what do you pay for a Zeiss 2/28 nowdays? Should we complain with the average prices paid? I think not.

This is legacy glass and does not have the new and improved coatings and ED glass. If it did then I guess I would be scoring the lens an 11 - but here I think we are talking 1%ers that cannot be discerned without pixel peeking.

I am extremely happy to have a copy of this lens. I simply cannot wait to try this on a FF camera. I will post some additional images when I do.

EDIT: More testing required after getting a copy of the FA31mm Limited. Comparisons between the two were inevitable. Early results show my K2/28 review to be correct with this lens being sharper and superior in CA PF and better bokeh. Colours and contrast between the two lenses are very similar.
Site Supporter

Registered: November, 2010
Location: California
Posts: 2,223

2 users found this helpful
Lens Review Date: February 6, 2014 I can recommend this lens: Yes | Price: $500.00 | Rating: 10 

Pros: Sharpness wide open, wonderful IQ, Zeiss Quality, Pentax Construction
Cons: A bit heavy and big, need to stop down with green button
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 10    Value: 10    Camera Used: K-5   

Pentax 28mm f2 + Pentax K-3 by Palenquero, on Flickr

PentaxK28mmf2-Lipitor-1 by Palenquero, on Flickr

PentaxK28mmf2-UnionStation1-1 by Palenquero, on Flickr

PentaxK28mmf2-Copon1-1 by Palenquero, on Flickr


January 15, 2015 Update

I sold this wonderful lens because I had another 28/2 lens almost if not as good, the Kiron PK 28/2. I have it in the Kiron, Vivitar versions, and it is good. Here is a sample of a shot with the Kiron PK. :

Kiron-PK-28mmf2-Copon-1 by Palenquero, on Flickr
Veteran Member

Registered: March, 2010
Location: Bologna, Amsterdam, Chiang Mai
Posts: 1,087

1 user found this helpful
Lens Review Date: June 3, 2012 I can recommend this lens: Yes | Price: N/A | Rating: 10 

Pros: IQ at close range and infinity, prestige
Cons: weight, size
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 9    Value: 10    Camera Used: LX, MX, K2   

The average price is quite low, considering the prices of other Pentax primes, after the launch of the last waves of high performance Pentax digital bodies.
This is one of the most extraordinary Pentax lenses ever sold! Come on!
I'd buy one for > 500 USD, if i weren't so lucky to find one for a nice price, LOONG time ago, probably sold by some silly fashion victim looking for the (then new) small "M" lenses.
I did the opposite, i sold my new 28 f/3.5 M, to get a faster lens. I was young and ignorant, totally oblivious of the noble origins of the lens and of its technical peculiarities. Fortunately i was already interested in funny looking photographic equipments, so i couldn't pass a 28mm wide angle looking like a 100mm tele... despite the cost, which was higher than any other Pentax second hand wide angle.
Many years later i learned that my 28mm f/2 was the first Pentax lens with floating elements, and that it was actually a Zeiss lens.
As correctly pointed out in the previous review, it was the only result of the short collaboration between Pentax and Zeiss to actually hit the market.
BTW, Pentax didn't have the technology at the time to calculate a wide prime with that optical layout, with floating elements that adjust the correction of the objective at different reproduction ratios (focusing distances).
Soon after the launch of the 28mm, Zeiss came to an agreement with Yashica/Kyocera, which of course ended the collaboration with Pentax, and started the modern Contax line.
It is unsure if the lenses came from Germany already coated, or to be processed with the famous seven layers SMC coating.
Whatever the truth, it makes little difference, as both SMC and T* coatings are super good!
What is certain, is that the Pentax 28mm f/2 is optically the same thing as the Zeiss Distagon 28mm f/2 for the Contax. The differences are pure aesthetics.
I decided to write my own review to point out that simple fact.
No need to waste any more words about optical quality. Just do a Google search for the Distagon almost mythical qualities...

One small caveat:
i haven't used this lens with digital bodies, hence i can't report about its digital performance.
It's a pity, i know.
I use DSLR bodies for travel photography, in situations with a certain amount of risk of theft/damage.
Probably i am too scared to bring my best prime lenses with me, i'd feel too bad if my lens bag gets stolen :-)
BTW, if i had to bring a few primes for a long trip abroad, i wouldn't choose an old wide angle.
The 85mm f/1.4 and 200mm f/2.8 would be much better candidates.

Anyway, if you find one of these scarce 28mm lenses, just buy it, you can't go wrong!
Just pray for a full frame digital Pentax, it would make your lens even more desiderable.


Inactive Account

Registered: April, 2009
Location: Massachusetts, USA
Posts: 48

1 user found this helpful
Lens Review Date: February 25, 2012 I can recommend this lens: Yes | Price: $600.00 | Rating: 10 

Pros: build quality, sharpness, virtually distortion free
Cons: none
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 10    Value: 10    Camera Used: K5   

just a jem of a lens !, build quality is great, sharpness is great. CLICK ONTO IMAGE TO ENLARGE. All shot with K5 and K 28/2 ( first version )
Senior Member

Registered: September, 2010
Location: Lyon area
Posts: 205
Lens Review Date: January 19, 2012 I can recommend this lens: Yes | Price: $200.00 | Rating: 7 

Pros: High quality
Cons: Usual prices; quite big and heavy
Sharpness: 8    Aberrations: 8    Bokeh: 8    Handling: 8    Value: 3   

I got a very good deal on this lens.
I feel that yes, it is quite excellent optically, but also quite over-rated... Its rarity leads to current used prices that (to me) do not reflect the actual value of this lens.
I found it also too big and heavy for something that should be a standard prime (just compare to the M/A versions!). All in all I sold it (at quite a profit) mainly because I didn't think it mas worth its market price.
Inactive Account

Registered: August, 2008
Location: Michigan, USA
Posts: 7,484

1 user found this helpful
Lens Review Date: February 26, 2011 I can recommend this lens: Yes | Price: $525.00 | Rating: 10 

Pros: Fast and sharp throughout its range.
Cons: None.
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 10    Value: 10   

Wow! Just plain Wow.. I had hoped when I paid what I did for a 28mm lens, that it would be all it was cracked up to be. I must say that it did not disappoint. The designers of this lens really knew what they were doing and it does its share to add to the K lens reputation. I spent a whole month with this lens glued (figuratively) to my K5. In spite of its size, it actually felt very well balanced on that camera. The build quality is superb and focusing with it is silky smooth. From close range to infinity this lens is sharp. It passes my CA torture tests with flying colors, or rather colorless. The color replication is dead on from what I can see (subjective because WB can affect the outcome).

Bokeh, what can I say. Smoooth.

General use.. If you can't get it with this lens, you aren't trying hard enough.

You can see more here.


Registered: March, 2009
Location: Salt Lake City, UT
Posts: 509
Lens Review Date: February 19, 2011 I can recommend this lens: Yes | Price: $550.00 | Rating: 10 

Pros: well built, background blurr, color, IMQ
Cons: pretty big and expensive
Sharpness: 10    Aberrations: 9    Bokeh: 10    Handling: 9    Value: 7   

Very well built. Focusing ring feels a bit different from other K lenses, perhaps due to its unique optical design.

Resolution is very high. Color is great. But I am not sure how it is compared with the famed 31mm limited. It seems to fare better than my K35 f2. A bit longer, perhaps the longest among 100mm and below. It is physically longer than my K85 f1.8. It is not always easy to get the right focus in low light when it is supposed to shine. Perhaps it will work better with the full frame.

Wonderful lens all in all. But I am not sure if it is worth the price I paid. Perhaps, it is more of a collector's item. The most expensive lens in my collection so far... It is so expensive that it has not see much daylight...
New Member

Registered: October, 2008
Location: Paris
Posts: 1
Lens Review Date: December 1, 2009 I can recommend this lens: Yes | Price: $450.00 | Rating: 10 

Pros: fast, very good sharpness and good bokeh
Cons: none

On K10D it front focuses (maximum sharpness just before green focus led shines) as many great aperture lenses. Knowing that, the sharpness is amazing at f:2 and beyond

great in low light conditions and distorsion free

Price is given for a lens in perfect conditions
Site Supporter

Registered: October, 2008
Location: Vancouver, Canada
Posts: 6,627

4 users found this helpful
Lens Review Date: August 29, 2009 I can recommend this lens: Yes | Price: $650.00 | Rating: 10 

Pros: Speed, sharpness, lens design and quality.
Cons: Perfection comes at a price.
Camera Used: K Series film bodies (K1000, KM, KX, K2, K2DMD)   

The K28/2 came out of a joint early 1970’s collaboration with Carl Zeiss of Germany. This collaboration also produced the ultra wide K15/3.5 lens. Pentax finally released their version of the 28/2 in 1976, a year after the initial K series releases. The K28/2 features a floating element design that was a first for Pentax, the only MF Pentax lens to feature it. (A prototype M35/1.4 also had a floating element design) The K28/2 was only in production for part of six years (1976-81) and then the floating element optical design was scrapped. The totally different M28/2 then A28/2 lenses replaced it. Two variants of the K series lens exist, the “SMC PENTAX 1:2/28” (1976-77) and the “smc PENTAX 1:2 28mm” (1977-81).

The K28/2s lens design and the fast f2 ended up creating a heavy expensive lens for its time. The K28/2 was the size of a medium telephoto lens and cost almost $200.00 more than the K50/1.2 & K24/2.8 when it was new. (January 1978 prices were $287.50 for the K50/1.2 & K24/2.8 and $471.00 for the K28/2) This would also explain its current rarity, as not many of these lenses would have been sold at that high price.

The 28mm focal length on a film camera, is my favorite for a wide angle lens. I have owned the K28/3.5 since it came out in 1975 and loved its sharpness. Its only knock is that it’s on the slow side. I had been searching for a faster wide angle that was equally sharp. I have the K35/2 and it’s fast but not as sharp as the K28/3.5, the K30/2.8 & K24/2.8 are sharp, but one stop slower than the K35/2.

The K28/2 fits the bill perfectly; it’s fast and is perfect for night/indoor shooting. I mostly shoot 100ASA slide film, so one stop does make a difference, especially at night. In the floating element lens design, some of the lens elements actually move when you focus for close-ups. This design creates much sharper images and eliminates aberrations. At close focus range the K28/2 can create a 3D image I have only found with one other lens, the K50/1.2. This is one sharp lens when used for close-ups, amazing!!

The K28/2 has a 52mm filter diameter and shares a common plastic clip-on lens hood with the other K series 28 to 35mm wide angle lenses. It’s also built very well and has a nice “meaty” feel to it.

The K28/2 is one of those rare unique Pentax lenses that have a collector’s aura about them. This is unfortunate as most people will never know how good it really is. How good is it? The best K series wide angle by far and probably the best MF Pentax wide angle lens ever made.

Sample shots taken with the K28/2. Photos are medium resolution scans from original slides.

Camera: K2 Film: Fuji Velvia 100 ISO: 100

Camera: K2DMD Film: Efke 50 processed in DR5 Chrome ISO: 50

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