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vlatkoufo · 08-21-2012, 12:33 PM

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!

**kiwi_jono** · 08-21-2012, 02:08 PM

Are you trying to use both on a Nikon or Pentax body and if so which one?

**boriscleto** · 08-21-2012, 02:09 PM

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.

vlatkoufo · 08-21-2012, 02:25 PM

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 ?

JinDesu · 08-21-2012, 02:27 PM

Originally posted by vlatkoufo

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.

vlatkoufo · 08-21-2012, 02:45 PM

I was thinking how is a better lens?

**kiwi_jono** · 08-21-2012, 02:55 PM

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.

alphanerd · 08-21-2012, 04:29 PM

Originally posted by vlatkoufo

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.

LesDMess · 08-21-2012, 08:03 PM

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.

simbon4o · 08-22-2012, 01:46 PM

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

LesDMess · 08-22-2012, 04:03 PM

Originally posted by simbon4o

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.

LesDMess · 08-22-2012, 04:57 PM

Originally posted by LesDMess

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.

vlatkoufo · 08-22-2012, 11:10 PM

simbon4o · 08-23-2012, 11:01 AM

Originally posted by LesDMess

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.

08-21-2012, 12:33 PM	#1
vlatkoufo Inactive Account Join Date: Oct 2011 Location: skopje Photos: Gallery \| Albums Posts: 25	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!

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08-21-2012, 02:08 PM	#2
kiwi_jono Loyal Site Supporter Join Date: Dec 2009 Location: Christchurch, New Zealand Photos: Gallery \| Albums Posts: 2,437	Are you trying to use both on a Nikon or Pentax body and if so which one?

08-21-2012, 02:09 PM	#3
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,477	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
vlatkoufo Inactive Account Join Date: Oct 2011 Location: skopje Photos: Gallery \| Albums Posts: 25 Original Poster	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
JinDesu Veteran Member Join Date: Jun 2011 Location: New York City Photos: Gallery Posts: 5,638	Originally posted by vlatkoufo 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
vlatkoufo Inactive Account Join Date: Oct 2011 Location: skopje Photos: Gallery \| Albums Posts: 25 Original Poster	I was thinking how is a better lens?

08-21-2012, 02:55 PM	#7
kiwi_jono Loyal Site Supporter Join Date: Dec 2009 Location: Christchurch, New Zealand Photos: Gallery \| Albums Posts: 2,437	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
alphanerd Senior Member Join Date: Mar 2011 Posts: 119	Originally posted by vlatkoufo 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
LesDMess Pentaxian Join Date: May 2011 Location: Santa Cruz, CA Photos: Albums Posts: 3,235	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
simbon4o Senior Member Join Date: Jan 2011 Photos: Gallery \| Albums Posts: 258	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
LesDMess Pentaxian Join Date: May 2011 Location: Santa Cruz, CA Photos: Albums Posts: 3,235	Originally posted by simbon4o 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
LesDMess Pentaxian Join Date: May 2011 Location: Santa Cruz, CA Photos: Albums Posts: 3,235	Originally posted by LesDMess 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
vlatkoufo Inactive Account Join Date: Oct 2011 Location: skopje Photos: Gallery \| Albums Posts: 25 Original Poster

08-23-2012, 11:01 AM	#14
simbon4o Senior Member Join Date: Jan 2011 Photos: Gallery \| Albums Posts: 258	Originally posted by LesDMess 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.

Pentax-A 50mm 1.7 vs Nikkor -s 50mm 1.4

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