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sharpness test 5x55/58mm lenses @wide open/f2.8/f5.6
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PostPosted: Thu Jan 03, 2013 1:46 pm    Post subject: sharpness test 5x55/58mm lenses @wide open/f2.8/f5.6 Reply with quote
just made a fast and dirty sharpness test wide open, @f2.8 and @f5.6 of various lenses
instigated by a thread about wide open sharpness of Re.Auto Topcor f1.8/58mm: http://forum.mflenses.com/topcon-re-auto-topcor-1-8-58-wide-open-sharpness-t52599.html

the lenses are
( taken with preset Macro Takumar f4/50mm on NEX5N )

1: Re.Auto Topcor f1.8/58mm


2: Super Takumar f1.8/55mm


3: Auto Mamiya/Sekor SX f1.8/55mm


4: Auto Takumar f2/55mm:


5: Auto Yashinon f2/5cm



the set up: ( taken with the Re.Auto Topcor f1.8/58mm @f5.6, reduced in size and sharpened )



I tried to focus on the f number 11, but please note that focus on some is either closer or further resp. possibly there was some focus shift or slight change of the focus ring when changing aperture
all photos taken with NEX5N as RAW, developed in LR with auto WB and auto exposure, 100% crops:

wide open:
1: Re.Auto Topcor f1.8/58mm:


2: Super Takumar f1.8/55mm:


3: Auto Mamiya/Sekor SX f1.8/55mm:


4: Auto Takumar f2/55mm:


5: Auto Yashinon f2/5cm:


@f2.8:

1: Re.Auto Topcor f1.8/58mm:


2: Super Takumar f1.8/55mm:


3: Auto Mamiya/Sekor SX f1.8/55mm:


4: Auto Takumar f2/55mm:


5: Auto Yashinon f2/5cm


@f5.6

1: Re.Auto Topcor f1.8/58mm:


2: Super Takumar f1.8/55mm:


3: Auto Mamiya/Sekor SX f1.8/55mm:


4: Auto Takumar f2/55mm:


5: Auto Yashinon f2/5cm


PostPosted: Thu Jan 03, 2013 8:27 pm    Post subject: Reply with quote
Interesting, many thanks for sharing!


PostPosted: Thu Jan 03, 2013 9:24 pm    Post subject: Reply with quote
Andreas, thanks for the comparison, it doesn't diminish my excitement for acquiring
the Topcor 58/1.8, at least, not yet. Laughing


PostPosted: Thu Jan 03, 2013 9:59 pm    Post subject: Reply with quote
I think this demonstrates that those common as nails Yashinons and Mamiya-Sekor lenses are nothing to scoff at. Although I'm surprised by how sharp the Yashinon 2/50 is wide open even though I own one and use it all the time.

The real test wide open is the corners though. Wink


PostPosted: Thu Jan 03, 2013 10:12 pm    Post subject: Reply with quote
Arctures wrote:
Interesting, many thanks for sharing!


glad to know that it is of interest to you Smile

Katastrofo wrote:
Andreas, thanks for the comparison, it doesn't diminish my excitement for acquiring
the Topcor 58/1.8, at least, not yet. Laughing


Bill it's such a great lens, I am sure you will like it! but hey, even though these other may be rather economical lenses, I pulled out some great competition here!
The wide open 100% crop of the Topcor may look disappointing but don't let those unsharpened, 100% crops from a 16MP sensor fool you! See the same wide open shot but a less tight crop, reduced and sharpened: ( clicking on it, in a new window, it even will be sharper! )




Mos6502 wrote:
I think this demonstrates that those common as nails Yashinons and Mamiya-Sekor lenses are nothing to scoff at. Although I'm surprised by how sharp the Yashinon 2/50 is wide open even though I own one and use it all the time.

The real test wide open is the corners though. Wink


I once had done a sharpness test including various f1.4/50 lenses, Takumars, a Nikkor, a Minolta, and some more normal lenses incl. the Auto Tak 2/55 but not including most of the other lenses presented here, and the Auto Takumar 2/55 had the best corners by a margin. Therefore I would be surprised if any other here would beat it, but certainly I should do a corner comparison incl. the Yashinon, also Mamiya which excelled here.


PostPosted: Thu Jan 03, 2013 11:43 pm    Post subject: Reply with quote
Andreas, yes, that is decent performance indeed, thanks for sharing!


PostPosted: Fri Jan 04, 2013 1:23 pm    Post subject: Reply with quote
kuuan wrote:

I once had done a sharpness test including various f1.4/50 lenses, Takumars, a Nikkor, a Minolta, and some more normal lenses incl. the Auto Tak 2/55 but not including most of the other lenses presented here, and the Auto Takumar 2/55 had the best corners by a margin.


Kuuan,

just a small question:)

.... did you compare the Auto Tak 2/55 with the other 1.4/50s all at f2 or the test was f1.4 vs f2 ???


PostPosted: Fri Jan 04, 2013 2:02 pm    Post subject: Reply with quote
Keysersoze27 wrote:
kuuan wrote:

I once had done a sharpness test including various f1.4/50 lenses, Takumars, a Nikkor, a Minolta, and some more normal lenses incl. the Auto Tak 2/55 but not including most of the other lenses presented here, and the Auto Takumar 2/55 had the best corners by a margin.


Kuuan,

just a small question:)

.... did you compare the Auto Tak 2/55 with the other 1.4/50s all at f2 or the test was f1.4 vs f2 ???


oh, I had presented that test that time here, just found it.
as you will see I did not remember 100% correctly, there is no Minolta in the mix. I used a Pentax *istDs which does not have live view, focusing certainly was not perfect though not that bad neither. There are corner crops of wide open, f2 and f2.8 of lenses tested, see: http://forum.mflenses.com/viewtopic.php?t=24095


PostPosted: Fri Jan 04, 2013 2:07 pm    Post subject: Reply with quote
Thanks Kuuan Very Happy


PostPosted: Sat Jan 05, 2013 11:33 pm    Post subject: Reply with quote
Keysersoze27 wrote:
Thanks Kuuan Very Happy


welcome Smile
and:

Mos6502 wrote:
I think this demonstrates that those common as nails Yashinons and Mamiya-Sekor lenses are nothing to scoff at. Although I'm surprised by how sharp the Yashinon 2/50 is wide open even though I own one and use it all the time.

The real test wide open is the corners though. Wink


today I did yet another shootout of more than 20 different 50 to 58mm lenses, half of them were Takumar / Pentax lenses though, besides those seen above also incl. e.g. MC Rokkor PC f1.4/50, Nikkor S Auto f1.4/50, Pancolar 1.8/50, and in Contax mount a prewar CZ 1.5/50, J-8 and Helios 103, on Sony NEX5N.
The Yashinon again performed stellar!

the set up ( Auto Yashinon 2/5cm @f4, converted in LR3.5 with auto exposure, auto WB, reduced and sharpened in PS )



these 100% crops are shot in RAW, converted to jpeg in LR3.5 without any editing / with default settings

Auto Yashinon @f2


Auto Mamiya Sekor SX @f2


Pentax M f1.4/50 @f2



Auto Yashinon @f2


Auto Takumar @f2


OM f1.8/50mm @f1.8!


it's many files...from what I see so far, @f2 best "near" corner ( the crop seen ) is OM f1.8/50 ( even @f1.8!, it doesn't have stop @f2 - corner sharpness, a typical strengths of OM lenses? The only other OM I have, a f2.8/24 had the best corners tested against other famous and very good 24mm, a Nikkor, Rokkor, Pentax K and Takumar ), the Auto Tak f2/55, close also the 'hybrid' Super Takumar f1.4/50 ( a lens I presented here: http://forum.mflenses.com/hybrid-3rd-version-of-super-takumar-f1-4-50mm-t55617.html - interestingly sharper in this crop than both the Super Takumer V2 which optically it is supposed to be, also better than the V1 which in turn is better then the V2 ), then SMC 1.4/50, Pentax M f1.7/50, the Topcor 1.8/58, which is not all that great wide open but already @f2 improves a lot and is near the best, it's amazingly sharp when further stopped down.

I tried to focus on the "Barong", the big eyed 'monster' of the miniature painting, and later saw that focus on the face of the bronze goddess in the middle unfortunately, and interestingly is less consistent then I had expected. So I am not sure if I 'dare' to show all these files, also I wouldn't want to plaster my flickr with them.
So please take my words with that grain of salt, but I'd say e.g. 'near center' @f2 best sharpness have the Auto Yashinon, again my 'hybrid', Pentax A f1.7, Pentax M f1.4, M f1.7, SMC f1.4, also S-M-C 1.4, Yashinon DX f1.7, great also the Pen-F f1.8/38 ( yeah, also included ) , the Topcor is good too.


PostPosted: Sun Jan 06, 2013 2:52 am    Post subject: Reply with quote
Since you've already done all the hard work, I'd say drop all the files here (via mass upload) and nobody on Flickr will know that you've been a naughty boy Wink


PostPosted: Sun Jan 06, 2013 10:23 am    Post subject: Reply with quote
fermy wrote:
Since you've already done all the hard work, I'd say drop all the files here (via mass upload) and nobody on Flickr will know that you've been a naughty boy Wink


it's 25 lenses, 7 takes each makes 175 photos, add two crops of each makes 525 total.
as mentioned, curious about performance towards the border, I had focused on the miniature painting and was surprised how inconsistent the focus on the face on the bronze statue turned out. Today I may do one more series focusing on the face of the bronze statue instead..


PostPosted: Sun Jan 06, 2013 9:32 pm    Post subject: Reply with quote
Nice results. Looks like the Pentax 1.4 is the overall winner, but the Yashinon is still great in the center wide open. I would imagine the differences between the Takumars might just be normal sample variation or different user histories (ie what climate they've lived in).


PostPosted: Mon Jan 07, 2013 12:51 pm    Post subject: Reply with quote
Mos6502 wrote:
Nice results. Looks like the Pentax 1.4 is the overall winner, but the Yashinon is still great in the center wide open. I would imagine the differences between the Takumars might just be normal sample variation or different user histories (ie what climate they've lived in).


so I have been working, reshot the series focused on the face of the bronze statue and uploaded to my flickr: http://www.flickr.com/photos/kuuan/collections/72157632455712332/
now the first 42 (!) pages of my flickr show all the same looking photo Laughing
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