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y
Joined: 11 Aug 2013
Posts: 304
Location: EU
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 Posted: Sat Mar 02, 2019 6:50 pm Post subject: Four landscape 28/3.5 - FF test |
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y wrote:
The contenders are:
* Olympus OM G.Zuiko Auto-W 28/3.5 - Cheap, easily available, version with no MC
* Asahi SMC Pentax K 28/3.5 - Relatively expensive, not so available
* Minolta MD II W.Rokkor 28/3.5 - Cheap, easily available, plasticky
* Asahi S-M-C Takumar 28/3.5 - Cheap, easily available, perfect build quality
All in near-minty state, no visible damage done.
Shots taken in RAW and developed using neutral settings & mild sharpening. Used a Sony A7 on a tripod & IR remote. Exposure settings: 1/15, f/11, ISO 100.
Result commentary:
As expected, center of the frame is fine. So, let's focus on the corner results:
* The Zuiko is actually visibly wider than 28mm. It got nearly no CA with lower contrast (?). Somehow, the shots were overexposed by 1+ EV using the same test settings.
* The Pentax K has proven that its performance is outstanding. No CA, high contrast, high resolution.
* The MD Rokkor features horrible CA combined with high resolution. The CA can be partially corrected in post but still, the missing information can't be fully restored.
* The Takumar performs accordingly to its age. Loads of CA and low resolution.
Full resolution samples:
Olympus OM G.Zuiko Auto-W 28/3.5
Asahi SMC Pentax K 28/3.5
Minolta MD II W.Rokkor 28/3.5
Asahi S-M-C Takumar 28/3.5 |
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kypfer
Joined: 27 Sep 2017
Posts: 515
Location: Jersey C.I.
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| Posted: Sat Mar 02, 2019 7:03 pm Post subject: |
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kypfer wrote:
Interesting ... thank you 
Coincidently, despite the 28mm being a favourite of mine, I don't have any at f/3.5 though there is a Fujinon in the post. |
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tb_a
Joined: 26 Jan 2010
Posts: 3678
Location: Austria
Expire: 2019-08-28
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| Posted: Sat Mar 02, 2019 7:16 pm Post subject: |
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tb_a wrote:
Quite interesting, thanks for posting. Maybe I should also repeat my test with the A7R II. On the other hand such comparisons didn't really show anything new compared to my old tests done on APS-C.
I'm rather surprised by the bad performance of the Minolta lens. My F2.8 version is much better when stopped down a little bit to something like F3.5.
Would be curios to see if the Pentax-K lens would be able to beat my CV 28/1.9 lens at same aperture. 
_________________
Thomas Bernardy
Manual focus lenses mainly from Minolta, Pentax, Voigtlaender, Leitz, Topcon and from Russia (too many to be listed here). |
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y
Joined: 11 Aug 2013
Posts: 304
Location: EU
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| Posted: Sat Mar 02, 2019 7:21 pm Post subject: |
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y wrote:
| tb_a wrote: |
| I'm rather surprised by the bad performance of the Minolta lens. My F2.8 version is much better when stopped down a little bit to something like F3.5. |
Yes, I was also surprised by the Rokkor when I first used it on a trip. Its resolution is very good but CA kills it. |
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caspert79
Joined: 31 Oct 2010
Posts: 2925
Location: The Netherlands
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| Posted: Sat Mar 02, 2019 9:16 pm Post subject: |
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caspert79 wrote:
Love the Pentax K 28/3.5.
I have three of them 🙄 |
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Sciolist
Joined: 29 Mar 2017
Posts: 1445
Location: Scotland
Expire: 2021-04-16
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| Posted: Sat Mar 02, 2019 11:33 pm Post subject: Re: Four landscape 28/3.5 - FF test |
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Sciolist wrote:
| y wrote: |
* Asahi S-M-C Takumar 28/3.5As expected, center of the frame is fine. So, let's focus on the corner results:...
* The Takumar performs accordingly to its age. Loads of CA and low resolution.
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Yep, my experience too. On top of that I've found it personally to be 'meh' in what it produces overall. Nothing more damning that 'meh' for a vintage lens. Disappointing, and strange as 35/3.5 is excellent. |
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Oldhand
Joined: 01 Apr 2013
Posts: 6009
Location: Mid North Coast NSW - Australia
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| Posted: Sun Mar 03, 2019 1:21 am Post subject: |
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Oldhand wrote:
Yes, the Pentax K 28/3.5 is truly excellent.
The other one in that series to keep a lookout for is the Pentax K 30mm f2.8.
Two gems from Pentax
Tom |
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kiddo
Joined: 29 Jun 2018
Posts: 1121
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| Posted: Sun Mar 03, 2019 1:50 am Post subject: |
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kiddo wrote:
| caspert79 wrote: |
Love the Pentax K 28/3.5.
I have three of them 🙄 |
I wonder if all 3 of them perform same, as I've read some times ago, a guy had to buy various to get the best of a bunch.....and that's not really nice in a 250 Euros lens,which most of the times one cannot return... |
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Oldhand
Joined: 01 Apr 2013
Posts: 6009
Location: Mid North Coast NSW - Australia
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| Posted: Sun Mar 03, 2019 2:49 am Post subject: |
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Oldhand wrote:
| kiddo wrote: |
| caspert79 wrote: |
Love the Pentax K 28/3.5.
I have three of them 🙄 |
I wonder if all 3 of them perform same, as I've read some times ago, a guy had to buy various to get the best of a bunch.....and that's not really nice in a 250 Euros lens,which most of the times one cannot return... |
Unless the lenses themselves have been rough-handled, then there would be no reason to expect anything other than similar results from each.
Pentax lenses of this era and earlier were all built to a very high standard, and quality control was excellent.
Virtually anything from Canon, Nikon, Pentax during the halcyon days of film in the era we are talking about, had top quality products that can still perform well today.
T |
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caspert79
Joined: 31 Oct 2010
Posts: 2925
Location: The Netherlands
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| Posted: Sun Mar 03, 2019 7:19 am Post subject: |
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caspert79 wrote:
| kiddo wrote: |
| caspert79 wrote: |
Love the Pentax K 28/3.5.
I have three of them 🙄 |
I wonder if all 3 of them perform same, as I've read some times ago, a guy had to buy various to get the best of a bunch.....and that's not really nice in a 250 Euros lens,which most of the times one cannot return... |
They perform all excellent. And all three look hardly used. |
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y
Joined: 11 Aug 2013
Posts: 304
Location: EU
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| Posted: Sun Mar 03, 2019 8:43 am Post subject: |
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y wrote:
| Oldhand wrote: |
| The other one in that series to keep a lookout for is the Pentax K 30mm f2.8. |
It seems to be even less common than the K 28/3.5, at least in Europe. |
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caspert79
Joined: 31 Oct 2010
Posts: 2925
Location: The Netherlands
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| Posted: Sun Mar 03, 2019 9:28 am Post subject: |
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caspert79 wrote:
| y wrote: |
| Oldhand wrote: |
| The other one in that series to keep a lookout for is the Pentax K 30mm f2.8. |
It seems to be even less common than the K 28/3.5, at least in Europe. |
Yeah, I think that lens was Japan only. |
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Oldhand
Joined: 01 Apr 2013
Posts: 6009
Location: Mid North Coast NSW - Australia
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| Posted: Sun Mar 03, 2019 9:35 am Post subject: |
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Oldhand wrote:
| caspert79 wrote: |
| y wrote: |
| Oldhand wrote: |
| The other one in that series to keep a lookout for is the Pentax K 30mm f2.8. |
It seems to be even less common than the K 28/3.5, at least in Europe. |
Yeah, I think that lens was Japan only. |
Yes, quite possibly.
It is not common, but a great lens if you can locate one
Tom |
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Steakface
Joined: 19 Oct 2017
Posts: 18
Location: Royal Oak, Michigan
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| Posted: Mon Mar 11, 2019 1:55 pm Post subject: |
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Steakface wrote:
I've owned 3 of those lenses (no experience with the Oly) and I would generally agree with those conclusions. My Pentax K 28mm 3.5 didn't impress me as much as I was expecting though, perhaps I had a bad copy. I was pretty disappointed in the Takumar, it's beautifully built but the huge field curvature killed any interest I had in that lens. My wife ended up taking it for her Spotmatic film camera where it's shortcoming aren't as obvious.
_________________
http://northernwintersky.net/
https://www.flickr.com/photos/northernwintersky/
Film Cameras: Minolta SRT-Super, Pentax MX
Digital Camera: Fuji X-T3
Most Used Lenses on Digital: MD 50mm f/2, Pentax K 55mm f/1.8, Pentax M 50mm f/1.7 |
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D1N0
Joined: 07 Aug 2012
Posts: 2491
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| Posted: Mon Mar 11, 2019 2:18 pm Post subject: |
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D1N0 wrote:
The SMC Pentax-m 28mm f3.5 is no slouch either and easier to find than the K and cheaper.
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pentaxian |
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MMouse
Joined: 18 Apr 2018
Posts: 58
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| Posted: Tue Mar 12, 2019 11:07 am Post subject: |
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MMouse wrote:
I think 200 € + asked for the K 28mm f/3,5 is too much, even if it seems to be a gem.
I have the Zuiko and find it very sharp on the A7. It's one of the very few wide angle I have which is 100% reliable. A keeper for me. |
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y
Joined: 11 Aug 2013
Posts: 304
Location: EU
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| Posted: Tue Mar 12, 2019 1:41 pm Post subject: |
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y wrote:
| MMouse wrote: |
I think 200 € + asked for the K 28mm f/3,5 is too much, even if it seems to be a gem.
I have the Zuiko and find it very sharp on the A7. It's one of the very few wide angle I have which is 100% reliable. A keeper for me. |
Zuiko is certainly sharp and nice. Given its price and availability it's really great.
However, you gotta crop your pics a bit - the absolute corners never get completely sharp. This is not the case with Pentax K. Here is an example - shot handheld using A7, Zuiko 28/35 at f/8. https://abload.de/image.php?img=dsc006869xe2o.jpg
Also IMO nothing can beat the build quality of Pentax K line. It's super smooth and tight.
Regarding the Pentax K price... It's certainly not low, but it delivers. FYI I got mine as Buy Now on Ebay for 160 USD including JP=>EU shipping. It's in excellent shape with original caps. |
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MMouse
Joined: 18 Apr 2018
Posts: 58
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| Posted: Tue Mar 12, 2019 2:26 pm Post subject: |
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MMouse wrote:
Zuiko's sample look overexposed compared to the others.
I think mine is sharp from edge to edge... Will check thought.
Pentax lenses look and feel nice but they are quite uncommon and usually overpriced... Wanted to buy 24mm and 50mm macro, both returned due to fungus.
I have a special silver version of the Zuiko 28mm and it's mechanically great. |
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kiddo
Joined: 29 Jun 2018
Posts: 1121
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| Posted: Tue Mar 12, 2019 2:44 pm Post subject: |
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kiddo wrote:
I wonder how the Nikkor 28mm 2.8 would do against the mentioned up here..... I have it sitting on the F3 ,but never was tempted to try it digital . If I'm right , there are people saying ,this was one of the sharpest lens of Nikon those days. |
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y
Joined: 11 Aug 2013
Posts: 304
Location: EU
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| Posted: Tue Mar 12, 2019 3:43 pm Post subject: |
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y wrote:
| MMouse wrote: |
Zuiko's sample look overexposed compared to the others.
I think mine is sharp from edge to edge... Will check thought.
Pentax lenses look and feel nice but they are quite uncommon and usually overpriced... |
The sample is ~ +1EV overexposed compared to others - the light conditions were the same as were the exposure settings.
The Pentax K lenses seem to be mostly available in Japan. |
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caspert79
Joined: 31 Oct 2010
Posts: 2925
Location: The Netherlands
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| Posted: Tue Mar 12, 2019 4:42 pm Post subject: |
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caspert79 wrote:
| y wrote: |
| MMouse wrote: |
Zuiko's sample look overexposed compared to the others.
I think mine is sharp from edge to edge... Will check thought.
Pentax lenses look and feel nice but they are quite uncommon and usually overpriced... |
The sample is ~ +1EV overexposed compared to others - the light conditions were the same as were the exposure settings.
The Pentax K lenses seem to be mostly available in Japan. |
I have no trouble findinf K lenses in Netherlands actually. They came with the first bayonet cameras from Pentax. They were not produced for very long though. The 30mm f/3.5 usually turns up in Japan. |
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KEO
Joined: 27 Sep 2018
Posts: 761
Location: USA
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| Posted: Tue Mar 12, 2019 7:59 pm Post subject: |
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KEO wrote:
Another potential contender in this category is the Konica Hexanon 28mm 3.5, a dirt cheap lens.
I have one and I've enjoyed shooting with it but I haven't put it through nearly enough testing to form a final opinion. |
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