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Archive 2013 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2
  
 
jcolwell
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p.1 #1 · p.1 #1 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Following Zuiko 50/1.8 vs Pentax M 50/1.7 http://www.fredmiranda.com/forum/topic/1189378/0#11342210 ...

...here's a comparison of three 50mm lenses, Olympus OM 50/1.8 MC (2366xxx), SMC Pentax-A 50/1.7 (1218xxx), and SMC Pentax-A 50/2 3474xxx).

I'll post a total of three sets of four images.

1. all lenses wide open
2. all lenses at f/2.8
3. all lenses at f/8

Each image is a four-panel screen capture of PS CS6 windows; three are 100% crops from each of the three lenses, and the fourth is the Navigator window, with a red square to show where the crops are located in the full images. The 100% image crop panels are arranged as follows.

top left: Olympus OM 50/1.8 MC
top right: SMC Pentax-A 50/1.7
bottom left: SMC Pentax-A 50/2
bottom right: Navigator window

Method: 5DII CR2 RAW files (no PP), ISO 100, tripod, MLU, 2 sec self-timer. Three images were taken at each aperture, for each lens, with focus/defocus between each image, using LiveView manual focus. The first step was to select the best image from each set of three, and then use that particular image for all 100% crop views. IOW, the 100% crops for a given aperture are all from the same image, not (for example) the best top-right image from one photo with the best bottom-left edge from another photo, and etc.

Summary: Oly wins this particular test at infinity focus.

Caution: I only tested copy one of each lens, variation between copies for a particular lens can be significant. OTOH, the results are very consistent.

Set 1, wide open.























Feb 16, 2013 at 05:40 PM
jcolwell
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p.1 #2 · p.1 #2 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Set 2, f/2.8






















Feb 16, 2013 at 05:41 PM
jcolwell
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p.1 #3 · p.1 #3 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Set 3, f/8






















Feb 16, 2013 at 05:42 PM
biconvex
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p.1 #4 · p.1 #4 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Impressive, the Oly blows the Pentaxes clearly out of the water here. Any info on the adapters you used?


Feb 16, 2013 at 08:42 PM
jcolwell
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p.1 #5 · p.1 #5 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


The Oly was on a Fotodiox Pro and the Pentax lenses shared an old adapter that I got on a 'famous' 24mm Sigma lens that I bought about five years ago from Mark Hubsand, at 16-9.net. The adapter worked very well on that lens, and on many Pentax lenses that I've had since then.


Feb 16, 2013 at 09:12 PM
sebboh
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p.1 #6 · p.1 #6 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


intriguing, your olympus seems to perform much better than mine. is this the "made in japan" version?


Feb 16, 2013 at 10:09 PM
mpmendenhall
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p.1 #7 · p.1 #7 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Wow, this isn't even a remotely close competition. I wonder if the Pentaxen will pick up at closer distances, or if they're always this stupendously outclassed.


Feb 17, 2013 at 12:10 AM
jcolwell
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p.1 #8 · p.1 #8 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Frankly, I'm surprised. This particular SMCP-A 50/1.7 served me very well with Pentax film cameras, even for fairly large prints. It really doesn't look too good on my 5DII. The Oly is quite new, photo of it below.

I might do some more comparison photos with closer subjects and 'bokeh' content.

I'll be comparing my SMCP-A 50/1.4 with a recently acquired Fuji EBC 50/1.4 that's also very nice.







Feb 17, 2013 at 12:50 AM
mawz
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p.1 #9 · p.1 #9 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


I would expect the 50/1.7 to improve significantly at closer focus distances, it's reputation for excellent is to some extent particular to close focus performance.

Overall this does confirm my expectations, having owned all three lenses. The 50/2 is adequate, cheap and tiny, the late Oly 50/1.8 is outstanding and the 50/1.7 is in between.




Feb 17, 2013 at 01:07 AM
 

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you2
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p.1 #10 · p.1 #10 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Is that the last version of the 50f1.8 ? If I remember correctly there are 6 or 7 different optical formulae over the years.
-
Hum this link suggest it is not the last version:
http://forums.dpreview.com/forums/post/23998062



Feb 17, 2013 at 02:27 PM
biconvex
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p.1 #11 · p.1 #11 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Second last as far as I can tell. However, reportedly no difference in optical construction to the last one according to olypedia

Just noticed that your link says that the aperture ring on this one is made of plastic. Can anyone confirm that this is also the case for the last version ("Made in Japan" on the front ring)? A metal one would be nicer



Feb 17, 2013 at 02:54 PM
jcolwell
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p.1 #12 · p.1 #12 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


The aperture ring on the lens used for this test is plastic.


Feb 17, 2013 at 03:08 PM
you2
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p.1 #13 · p.1 #13 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


I'm 99% sure the aperture ring on the last one is also plastic. The lens is not the best in over all construct (I had a couple) as it was sold as a very cheap 'kit' lens near the end of the OM cycle. After olympus dumped the OM line you could pick them up new for less than $50 (which is when I acquired a pair). I liked the optical results.


Feb 18, 2013 at 01:29 PM
redisburning
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p.1 #14 · p.1 #14 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


I have had two MiJ 50/1.8s and it is a very cheaply built lens.

no worries, I paid 25 dollars for each one and they embarrass a lot of good lenses.

it still wasn't as bad as the 40/2 though, lol. again another lens that had great optics.



Feb 18, 2013 at 03:52 PM
Michael Gordon
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p.1 #15 · p.1 #15 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Definitely 5 major flavors with the MIJ usually thought of as the best. John Hermanson
confirmed this and he has worked on all of them. Found this quickly on the OM list archive: http://lists.tako.de/Olympus-OM/2011-09/msg00048.html

That be said I like my Z. 50/1.4 better than my type 3 50/1.8. The Z. 50/2 macro when used as a normal non macro lens has a nice rendition as well.




Feb 19, 2013 at 07:08 PM
klakier
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p.1 #16 · p.1 #16 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Basing on filenames you confused the last 2 images from the f/8 set - they are for max apertures, not f/8. Also some of the f/2.8 set images are at max aperture.

P.S. Hello everyone

Edited on May 05, 2013 at 11:09 PM · View previous versions



May 03, 2013 at 10:26 PM
jcolwell
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p.1 #17 · p.1 #17 · Oly 50/1.8 vs SMCP-A 50/1.7, -A 50/2


Thanks for the heads-up. I'll check the original files and update the thread in a day or so.

P.S. welcome to FM.



May 03, 2013 at 10:41 PM





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