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08-21-2012, 12:33 PM   #1
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Pentax-A 50mm 1.7 vs Nikkor -s 50mm 1.4

hi.i need your help to tell me who lens to choose. Pentax-a 50mm 1.7 or Nikkor-s auto f=1.4 50mm Nippon Kogoku ?
thank you!

08-21-2012, 02:08 PM   #2
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Are you trying to use both on a Nikon or Pentax body and if so which one?
08-21-2012, 02:09 PM   #3
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If you are using Pentax you will want the A50/1.7. As an A lens it will have full functionality on a Pentax DSLR other than AF. The non-AI version of the Nikkor can be force fit to a Pentax DSLR, but it will act like an M42 lens.
08-21-2012, 02:25 PM   #4
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i have pentax k-r,pentax-a 50mm 1.7 I had already and today I got nikkor lens, so now I think who lens to sell ?

08-21-2012, 02:27 PM   #5
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QuoteOriginally posted by vlatkoufo Quote
i have pentax k-r,pentax-a 50mm 1.7 I had already and today I got nikkor lens, so now I think who lens to sell ?
Someone who owns a Nikon. If you have marketplace access here, you could try that. Or Ebay.
08-21-2012, 02:45 PM   #6
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I was thinking how is a better lens?
08-21-2012, 02:55 PM   #7
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Both lenses are quite different and have strengths in different areas. I would have thought that the A 50 f1.7 would be the best fit for most scenarios.
08-21-2012, 04:29 PM   #8
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QuoteOriginally posted by vlatkoufo Quote
I was thinking how is a better lens?
On a Pentax camera, undoubtably the Pentax lens will be better. There will be significant extra functionality, and the lens is great.

The Nikon will only sort of even *fit* on your camera. Their mounts are different. If you don't understand that, then you definitely want the Pentax lens.

08-21-2012, 08:03 PM   #9
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As others have said, the Pentax-M 50mm f1.7 is a sized matched pair with an M Series Pentax while a Nippon Kogaku 50mm f1.4 works best on a Nikon that can utilize a none AI lens.

08-22-2012, 01:46 PM   #10
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Make a small simple comparison. Shoot brick wall or something than some bokes and for final try them with sunlight in the frame to see which one is better handling the lights.
I have tried both and none of them is ultimate 50mm for every job. But the Nikkor is crazy sharp and contrasty at 1.4, maybe 2 times better than takumar 50 1.4 or other pentax 50 1.4! And the nikkor has 7 aperture blades instead of the hideous 6 straight blades of the 50 1.7 pentax.
Compare them and decide.

Nikkor-S 50 1.4
gallery with K200D and Nikkor
08-22-2012, 04:03 PM   #11
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QuoteOriginally posted by simbon4o Quote
And the nikkor has 7 aperture blades instead of the hideous 6 straight blades of the 50 1.7 pentax.
I didn't see a picture of the Nikkor lens you have with 7 blades so maybe you are comparing to a newer version? Below is a picture of the Nippon Kogaku NIKKOR-S Auto 50mm f1.4 I have and it only has 6 blades. The blade pattern shown below is prominent between wide open and f2.8. There were lots of revisions to the 50mm f1.4 at Nikkor 50mm f/1.4 non-Ai Standard Lenses - Version History - Part II but it doesn't seem to list number of blades along the way. They do show pictures of which ones are Nippon Kogaku and which aren't.

08-22-2012, 04:57 PM   #12
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QuoteOriginally posted by LesDMess Quote
The blade pattern shown below is prominent between wide open and f2.8.
Correction as obviously in wide open position you won't see the blades. I meant to say that this blade pattern shows up after stopping down from wide open to f2.8.
08-22-2012, 11:10 PM   #13
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08-23-2012, 11:01 AM   #14
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QuoteOriginally posted by LesDMess Quote
I didn't see a picture of the Nikkor lens you have with 7 blades so maybe you are comparing to a newer version? Below is a picture of the Nippon Kogaku NIKKOR-S Auto 50mm f1.4 I have and it only has 6 blades. The blade pattern shown below is prominent between wide open and f2.8. There were lots of revisions to the 50mm f1.4 at Nikkor 50mm f/1.4 non-Ai Standard Lenses - Version History - Part II but it doesn't seem to list number of blades along the way. They do show pictures of which ones are Nippon Kogaku and which aren't.
maybe it was P version than. I'm not sure but it was 7 bladed, look at the flares in the gallery I posted.
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