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Tamron Adaptall-2 28mm f/2.5 (02B)

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16 78,031 Wed June 19, 2019
Recommended By Average Price Average User Rating
100% of reviewers $54.14 7.88
Tamron Adaptall-2 28mm f/2.5 (02B)

A moderate wide angle lens with slightly above average performance. The extremely compact optical design minimizes flare and off-axis coma. This lens is notable for being very compact and lightweight, which may be desirable attributes if you are planning on travelling light. Overall, this lens is a nice fixed focal length wide angle which provides decent performance at F/5.6 and smaller apertures. -

Weight: 230 gr
Length: 33 mm
Filter Diameter: 49 mm
Min. Focus: 180mm
Max. Magnification: 1:5.8
Diagonal FOV: 75
Horizontal FOV:
Horizontal FOV on Digital:
Min. Aperture: f/32
Optical Construction: 7 elements 7 groups
Coatings BBAR Multi layer

Note that this, and other f2.5 adaptalls, will register as f2.4 with the PKA mount. Also, as in the pic, at infinity focus the front end is flush with the focus barrel. Some screw on hoods, for example, can stop the lens reaching infinity focus.
Mount Type: Third-party (adapter required)
Price History:

Add Review of Tamron Adaptall-2 28mm f/2.5 (02B)
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New Member

Registered: June, 2019
Posts: 1
Lens Review Date: June 19, 2019 I can recommend this lens: Yes | Price: $44.00 | Rating: 7 

Pros: Feels nice to use. Bokeh looks nice.
Cons: Does flare often.
Sharpness: 7    Aberrations: 7    Bokeh: 8    Handling: 8    Value: 6   

It's an okay lens to me but it just isn't one of my favorites to use.
Site Supporter

Registered: May, 2015
Location: Hampshire
Posts: 843
Lens Review Date: September 21, 2018 I can recommend this lens: Yes | Price: None indicated | Rating: 9 

Pros: It is an adaptall
Cons: Not much at all.
Sharpness: 8    Aberrations: 7    Bokeh: 7    Handling: 10    Value: 10    Camera Used: K-5   

I have not given a cost for this lens because I bought it with a Canon FD breechlock adapter which may have put other buyers off. Not a problem when you have a PKA adapter to be able to put on. Tamron did a good thing with the adaptall mounts.
It cost $8 at todays exchange rate!

It is not a great lens, some green fringing can become apparent at wider apertures but in the main they are absent to the naked eye.
It is reasonably sharp from F5.6-F11, peaking perhaps around F10. Not so sharp as to be pleasing at wider apertures but images are not unpleasing.
In bright sunlight wider apertures exhibit some glow (or whatever it is called) from some subjects that reduces the lens to needing a pretty long hood (I used a telephoto hood with a 49-62mm step up ring) to reduce the effect.
I quite like this lens, having an "A" setting is great, the focus ring feels like it is a precision instrument. Better than my Sigma 28mm mini-wide version 1 with no "A" available.
amateur dirt farmer / mod

Registered: December, 2014
Location: probably out in a field somewhere...
Posts: 14,342

2 users found this helpful
Lens Review Date: September 7, 2016 I can recommend this lens: Yes | Price: $65.00 | Rating: 8 

Pros: build quality, sharpness, compact
Cons: lens coatings not quite up to today's standards
Sharpness: 8    Aberrations: 8    Bokeh: 8    Handling: 9    Value: 9    Camera Used: K-3, K-50   

my review of the Tamron Adaptall-2 02B (28mm f2.5), after using it for the August 2016 Single In Challenge:

after shooting for the first eight days with my DA21 Ltd and determining that there is a focus problem with that lens, I switched to the 02B. I have to say that I have been pleasantly surprised. To be honest, I swapped lenses with a bit of dread - going from the DA21 to the 02B would certainly result a dull, lackluster month.

I couldn't have been more wrong. While the 02B is not a replacement for a DA21, it can certainly pull its own weight. To begin, it is an Adaptall-2 lens and as such, you must acquire an Adaptall-2 adapter. I use only P/KA adapters on these lenses so I essentially have an 'A' lens and not muck about with green-button-metering. I have three Adaptall-2's that can utilize the 'AE' setting on the lens and all three have dedicated adapters - it only makes sense to me.

my copy was purchased as a 'used' copy from the Marketplace here on PF for $65.00, which is on the high side of what I would normally pay for a bog-standard, manual focus 28mm lens - but I was pleasantly surprised at the shape of the lens when I received it: I cannot tell that it had ever been used. All the markings are intact, with Tamron's scheme of white/turquoise/red giving the lens a distinctive look. Additionally, the glass is clean and unmarked - essentially, this appears to me as a new lens.

anyway - the build of the lens is roughly equivalent to a tank; where the SMC A 28mm lenses can seem rather dainty, this lens has a larger barrel and focus ring, while retaining a 49mm filter ring (which I use for a metal hood). It has an all-metal build and has a tactile feel to it that is quite pleasurable to use - a well-damped focus ring rounds out the exceptional build quality.

with the f2.5 aperture (I read both 2.5 and 2.4 on my K-3, all the way up to f22), this lens is quick enough to be able to shoot in failing light without having to add too much ISO to the mix. it produces warm, accurate colors and is quite sharp once you are above f4 and beyond. it has an MFD of about 7 inches, so it is easy to get closer to your subject - it is not, however, a macro lens.

on the downside: it's coatings are not up to par with modern lenses; it will ghost/flare/lose contrast in strong light if care is not taken.... that's it for the downside - I was so surprised by the performance of this 28mm lens, I've stopped looking for an SMC 28mm - I simply don't need one.

if you don't mind the entire Adaptall issue, this is a worthy manual-focus 28mm lens to consider.... I like it better than the Sigma Mini-Wide II that I Singled with a few months ago, and I thought that was not a bad lens at all - now I am considering selling that Sigma...

some of my favorite shots with the 02B:

sunflower and sky by Pepperberry Farm, on Flickr
dew on mulberry leaves by Pepperberry Farm, on Flickr
against a rippled sky... by Pepperberry Farm, on Flickr
hayfield at sunset by Pepperberry Farm, on Flickr

and my flickr album of this lens:
Veteran Member

Registered: January, 2012
Posts: 1,972
Lens Review Date: May 8, 2015 I can recommend this lens: Yes | Price: $65.00 | Rating: 9 

Pros: Sharp, small and compact, fast, rendering, flare resistance
Cons: corners weak untill f4-5.6 - but that's normal really
Sharpness: 8    Aberrations: 9    Bokeh: 9    Handling: 9    Value: 9    Camera Used: K-01, K10D   

Firstly I can confirm what others have mentioned - the rendering of this lens is fairly warm. I actually happen to like it, but even if I didn't - this is easy to rectify in the post-processing anyway.

Lens is sharp and let me tell you this - central sharpness is really good right from the start. Edges and corners catching up soon, maybe past f4 - by f8 , where you would care for corners and edges it all is pretty much the same.
Bokeh wise it is nice, smooth and pleasant to eye - especially in closely focused shots.
Good flare resistance - the front element is so small that this lens barely flares !

I love the fact that it is a P-KA lens with my P/KA adapter ! this is so great, I wish some of my Smc-m primes could do just that

Handling is great, good, metal and rubber built quality with little plastic used. Pretty much a sleeper lens, considering how much they go for. I have also a whole range of other 28mm lenses, and although my SMC-F and Kiron 28mm are both better when stopped down, I wouldn't necessary say they are better lenses. The rendering of this Tamron is somehow unique, warm, amazing for Autumn colours. If you really don't have any 28mm prime by now - this one that is good to start with ! Of course the overall price will higher because of the mount, but this lens is worth it. I especially like it in low light, where it really delivers. My Kiron 28mm f2.0 is faster by tiny bit and offers equal sharpness from wide open in centre, but gets less love because it is a PK lens - convenience sometime prevails.

I paid 45 for it with case and PK adapter, which tends to go for a tenner - so the price paid should actually be little bit less.
Strong 8.5 - so 9 for me , since there are no 8.5's :P
Site Supporter

Registered: November, 2012
Location: Vancouver, BC
Posts: 650
Lens Review Date: September 11, 2014 I can recommend this lens: Yes | Price: $80.00 | Rating: 8 

Pros: Nice center sharpness, well built, easy throw
Cons: Some may not like the more warmer hue of the photos
Sharpness: 8    Aberrations: 8    Bokeh: 7    Handling: 10    Value: 8    Camera Used: Pentax K-01   

The lens is well built with a mostly metal build. This is not as sharp as the K 28mm f3.5 lens in the corners but in the center is very sharp. Can be a little soft until f4. The rendering is more a natural warming look rather than the Pentax pop. If you like a rugged lens with the ability to shoot in lower light than the M 28 f2.8 then here's an option.

Junior Member

Registered: January, 2013
Location: Texas
Posts: 32
Lens Review Date: February 8, 2013 I can recommend this lens: Yes | Price: None indicated | Rating: 9 

Pros: Price, center sharpness, build quality
Cons: Yellowish color rendition
Sharpness: 9    Aberrations: 9    Bokeh: 9    Handling: 10    Value: 10   

This lense is very well build. Compared to a Pentax M28/2.8, at full aperture, full frame, the Tamron is slightly sharper in the middle and slightly less sharp in the corners; near-identical at f4.0 and above.
One thing I didn't like (with films; easy to correct digitally): a yellowish color rendition.
Forum Member

Registered: June, 2012
Posts: 80
Lens Review Date: September 9, 2012 I can recommend this lens: Yes | Price: $60.00 | Rating: 7 

Pros: VERY sharp center, easy MF
Cons: Corners quite soft even on crop sensor
Sharpness: 7    Aberrations: 8    Bokeh: 7    Handling: 8    Value: 7   

Not a bad lens and center-frame sharpness is impressive but toward the edges it gets quite soft and smeary. The edges clean up toward 5.6 and 8 but never reach the edge sharpness of a Rikenon or even Toyo 28!

PF is pretty well controlled by f4! CA is good by 5.6 except at the edges.

Bokeh is decent wide open but quickly takes on a rounded saw tooth pattern. Odd.

Needs a hood with that front element being right out there.

You can get a better 28, cheaper. I was hoping for a bit more but I did get the great PKA adapter with it!
Site Supporter

Registered: April, 2011
Location: Lost in translation ...
Posts: 17,482
Lens Review Date: April 18, 2012 I can recommend this lens: Yes | Price: $35.00 | Rating: 7 

Pros: Build quality, sharp enough, fast enough
Cons: None really for the price/quality ratio ... maybe bokeh, muted colors, hood clearance
Sharpness: 7    Aberrations: 7    Bokeh: 7    Handling: 8    Value: 8   


Maybe I was expecting a bit too much from this lens ... quite frankly I was slightly disappointed with this acquisition. I purchased it off a French e-bay equivalent with its original case plus a PK/M AD-2 mount included ... but, the front element has a series of micro scratches towards an edge, a bit too much dust ... and the PK/M mount was missing an internal screw, thus it had some "play" between the two half sections. (The price quoted does not include a reasonable deduction for the PK/M mount)

I complained to the seller about these problems, and then realized after his responses that it was not worth pursuing any further ... lesson learned. Eventually I disassembled this mount (mine resembles the photo above) and added the missing screw (taken from an Olympus AD-2 mount), thus solving that problem. OTOH, the scratches are forever ... but have not seen anything significant on a photo yet ... and keeping fingers crossed.

Overall, this lens performs well, but I guess that I cannot get past my initial problems with it. I do not have a lot to add which has not been already covered by the previous reviews. Very solid build quality, good smooth throw (with nice feel rubber ring focus grip), flare does not seem to be a major issue (but I always shoot with a rubber hood and rarely into direct light) ... colors are too cold for my tastes and the bokeh is only OK for me ... Much more fun to use with a PK/A mount and if you like, looks "kinda retro-cool" on the K-5.

As an aside, I have to use a 49mm filter with a rubber hood on this lens. Without the additional length added by the filter's width and using my rubber hood alone, one cannot focus beyond 1.5m ... the barrel recedes too much into the focus ring and (without a filter) will be blocked by my hood . Maybe I need to find an original Tamron hood (?) ...

I going to rate at a conservative "7" for the moment, and I will upgrade if necessary after running this lens through a bit more photos and different uses ... especially some better "close" focus tests, low light, etc. I also just acquired a Super-Tak 28/3.5 (M42) and a Soligor 28/2.8 (T4), so a "shoot off" might be interesting to do ...

Allez et bon courage, John le Frog
New Member

Registered: September, 2010
Location: Milano
Posts: 9

1 user found this helpful
Lens Review Date: October 11, 2011 I can recommend this lens: Yes | Price: $79.00 | Rating: 7 

Pros: good build quality, quite good performances
Cons: often affected by flares
Sharpness: 7    Aberrations: 7    Bokeh: 7    Handling: 8    Value: 8   

Quite portable lens, but i don't use this focal length it very much on APS-C. It returns very neutral (natural?) colors ,but I prefer the Pentax ones. I like the solid-metal build quality and the sharpness is not so bad for a wideangle.

some pics:
Veteran Member

Registered: January, 2011
Location: Minahasa, North Celebes (Sulawesi)
Posts: 585
Lens Review Date: March 29, 2011 I can recommend this lens: Yes | Price: $75.00 | Rating: 10 

Pros: Sharp. Lightweight yet solidly built. Capable on lowlight. Flare resistance is very good
Cons: Industrial design, not as 'arty' as Pentax's. Less vibrant color than the SMC's, but it means a more 'natural' color.

I had the SMC M 35/2.8 and it's a great lens. However, I needed a wider lens, also a better lowlight performer. Sadly, the K/M/A 28mm F2 is way over my budget, so I settled with this one. I bought this lens in a almost unused condition, paired with a K/M adaptall mount, complete with it's original case for $75. It's worth the price I paid, thats for sure.

Colors are a bit less vibrant then Pentax's, but this also means a more natural taste, and it's not really a con. On sharpness, still on a par with a few Pentax's I already tested. I also like the soft, kinda paint-like, soft bokeh this lens produce. Build quality is great, feels like this lens can take quite a beating. Focus ring is quite pleasant to play with, generous amount of DOF making focusing is a breeze. It seems not to have as much as a focus turn as my M 35/2.8, but for me this translates to a more easier focusing. This lens is a reliable performer in lowlight. I used to boost ISO to 800 or more to get decent picture with my M 35/2.8, but with this lens I played at 400 and the results are pleasing. I also tried to shoot facing the sun and amazed to this lens ability to tackle flare, it's maybe even better than SMC's.

I missed the more aesthetic, artistic design of Pentax lenses, though. This lens, like many other Adaptall lenses, clearly is really made more as a tool, not a work of art. But hey, I want to take good pictures, not to put my gears in a display at an art gallery

Here's a few shots:

Wide Open

F4 - Extreme cropped

Around F5 - F8

If you're looking for a reasonably priced, good performer, get one of these.
Veteran Member

Registered: February, 2010
Location: Stockholm
Posts: 634
Lens Review Date: December 18, 2010 I can recommend this lens: Yes | Price: $30.00 | Rating: 9 

Pros: Sharp, lightweight, 15cm close focus, easy to manually focus, cheap, great colors and bokeh is very nice.
Cons: No Autofokus?

Been wanting to test this one for a while even though reviews hasnt been great.
Found one that looked to be in great condition and bought it not expecting anything great or even good.
First shots was of my cat drinking and everyshot I took came out great. It is not often that happens so I was very pleased. The lens is very easy to focus with and I could get as close as 15cm which was great fun.
Im guessing some of the reviewers has bad copys and I was lucky to get a good one.
I would like to give it a 10 but thats reserved for a spectacular lens that has what this one has + autofokus, bells and a fake beard.

Here is a shot.
Taken in a hurry wide open with a diffused flash pointing up.
Not the sharpest and slightly dark perhaps but good enough to prove my point I think. I havnt edited it at all except crop and I did clean up the sink....
Adding sharpness in Lightroom can make this incredibly sharp without artifacts. Im amazed! And glad I finally bought it

Heres a 100% Crop
Veteran Member

Registered: July, 2009
Location: 14er Country
Posts: 323
Lens Review Date: September 23, 2010 I can recommend this lens: Yes | Price: $25.00 | Rating: 6 

Pros: Cheap and OK optically
Cons: There are better options

I picked this up off of everybody's favorite auction site one day as a temporary fill in for my M 28mm f3.5 that was having some issues.

All in all, it's just kind of an OK lens. It won't ruin pictures, but it doesn't really do anything special with them, either. It's sharp enough, the bokeh is OK, the colors are somewhat muted as the previous poster mentioned.

If you need a cheap 28mm option, this and a KM mount will work. If you've got a little spare cash, you can do a lot better.
New Member

Registered: December, 2009
Posts: 14
Lens Review Date: August 4, 2010 I can recommend this lens: Yes | Price: $40.00 | Rating: 6 

Pros: solid build
Cons: focuses past infinity

pretty good lens, very nice build quality. relatively sharp, but not my sharpest lens. lens is prone to flare especially on digital. colors come out a little muted. the thing that really bothers me about this lens is that it focuses past infinity. not usually a problem as it is a manual focus lens, but it makes it a pain to do hyper focal focusing, or just hit infinity focus in low light. I also find the angle of view (on aps-c) to be kinda awkward to use. this is a pretty good lens on film, and a ok lens on digital.
Inactive Account

Registered: June, 2009
Location: Santa Cruz Mountains
Posts: 53
Lens Review Date: July 11, 2009 I can recommend this lens: Yes | Price: $50.00 | Rating: 8 

Pros: compact low cost...crispy detail+contrast.
Cons: none

i had a new one from the early 80's and somehow it's with some other missing stuff I got another.

Hard to beat as a 28 prime as it's a bit smaller + faster than most as seems very sharp. Adaptall,to me,is always a plus since I do both screw mt+K mount.....and at times,Nikon or Minolta. If I score a deal on the 24 2.5 I may sell my 28 someday but for now it is superior to the 28 of any zoom.
Senior Member

Registered: November, 2007
Location: Michigan
Posts: 131
Lens Review Date: November 9, 2008 I can recommend this lens: Yes | Price: $30.00 | Rating: 8 

Pros: Light, easy to focus, sharp, cannot beat the value
Cons: Mine is dented!

I got this lens "as-is" from a local shop before going to the Shenandoah Valley for a session. I wanted an alternative to the kit for landscapes.
It is a solid performer. I also took it with me as my only lens when visiting a friend - this provided me ample opportunity to put this workhorse through its paces. My friend was late, so I took some long exposures just after sunset and got great results.
I am very happy with this lens - an excellent value!
Add Review of Tamron Adaptall-2 28mm f/2.5 (02B)

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