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09-11-2010, 07:54 PM   #1
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Which lens is better Pentax 50mm 1:2 Rikenon 50mm F2.0

Which is better a Rikenon 50mm 1:2 lens (Not an XR) its just plain 50mm. Or a Pentax 50mm 1:2? Also what is the difference between a plain Rikenon vs a XR Rikenon? Thanks


09-11-2010, 09:21 PM   #2
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You can read about each lens here:
Rikoh Rikenon P 50mm F2 Lens Reviews - Pentax Third-Party Lens Review Database
SMC Pentax-A 50mm F2 Lens Reviews - Pentax Lens Review Database

I believe that XR lenses are of higher quality than non-XR lenses, but I'm not 100% sure about that.

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12-06-2010, 04:04 AM   #3
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Hi guys, I was searching the forums for a review for this lens, the Rikenon, and I wonder if all that talk about the P pin would stop me using it on a K-x. The photo with the product is here:
Rikenon 50mm f2, montura Pentax - Okazii (51044548) - hope thats not against the rules. The guy is in my town, and the price is a bit over the 15$ range I found here in the reviews.
Thanks.
12-06-2010, 07:43 AM   #4
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The Rikenon 50mm f2 XR has something of a cult status on the 'net as one of the sharpest lenses ever made. I tried one and was kind of disappointed. It was sharp, but it wasn't *that* sharp. My Pentax 50s (M 50mm f1.7, SMC Takumar 50mm f1.4 and FA 50mm f1.4) all easily beat it. Of course, it was just one lens so it could be a victim of sample variation. Still, it didn't come close to the hype for me.

I will say, however, that it was significantly better than the M 50mm f2.0 I tried awhile back (when I was consciously collecting 50s). That was most evident shooting at wide apertures. The Rikenon had decent performance wide open. The M 50 f2...not so much.

I don't know how the non XR Rikenons do, but most medium speed 50s are good to great, especially when stopped down.

If you do go the Rikenon route, make sure it's one of the older ones without the dreaded Ricoh pin.

Good luck!

12-06-2010, 09:18 AM   #5
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How about the one in the link then, I saw the P on it, so I guess it is not that good, then.
12-19-2010, 06:06 AM   #6
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I too bought a rikenon XR 50mm f2 after reading on net that it takes very sharp photos. But found out it is not better than the pentax M 50mm f2. In fact, the pentax one is slightly better than rikenon.
12-19-2010, 02:27 PM   #7
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QuoteOriginally posted by jasonbx Quote
I too bought a rikenon XR 50mm f2 after reading on net that it takes very sharp photos. But found out it is not better than the pentax M 50mm f2. In fact, the pentax one is slightly better than rikenon.
I took a handful of shots and found nothing spectacular about the Rikenon. Also, the Pentax-M 50/2, even though it has the cheapest build of all M lenses, is way better than the plasticky Rikenon.
12-19-2010, 04:01 PM   #8
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Get M42 Rikenons. No R pins, no worries.

I have recently acquired M42 Rikenon 50/2 (US$10) and 55/1.8 (US$6). I'll have to try them some time, compare them with the M50/2 (US$38), Olympus 50/1.8 (US$18), Meyer Oreston 50/1.8 (US$11), Petri CC 55/1.8 (US$17), etc. But they may have a hard time matching a little Exakta-mount CZJ Tessar 50/2.8 (12 iris blades, US$7).

Consider price. If a lens costs less than a sandwich, I go for it. If it costs more than a large pizza, I think about it. If it costs more than a new tire, I think very very hard...

06-13-2012, 10:08 PM   #9
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Some pictures taken with Rikenon 50mm 1:2


06-13-2012, 10:40 PM   #10
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QuoteOriginally posted by Octi Quote
Hi guys, I was searching the forums for a review for this lens, the Rikenon, and I wonder if all that talk about the P pin would stop me using it on a K-x. The photo with the product is here:
Rikenon 50mm f2, montura Pentax - Okazii (51044548) - hope thats not against the rules. The guy is in my town, and the price is a bit over the 15$ range I found here in the reviews.
Thanks.
Rikenon lenses that have a P mode on them and if they have a little pin that looks something like a ball bearing on them they are good to go.

1. You CAN use these on a SLR. I use two of Rikenon lenses on my K-5. I have a 1:1.4 50mm and a 1:1.7 50mm.

2. The P is meaningless on a modern SLR. You have to use it completely manually (unlike A mount Pentax lenses which you can adjust the aperture from the camera itself). In short you have to manually turn the aperture ring to where you want it. For me this has hardly been a concern.

P= meaningless. The lens will be manual.
A mount lenses made by Pentax however are good because you can adjust through the full range of apertures to suit your needs.

For example I have an A mount Pentax 1:1.7 lens...

I can adjust it from the camera to be at 1.7 aperture, 1.8, 1.9, 2.0, etc...so it gives more flexibility to fine tune if that's what you want.

With the Rikenon lenses you manually turn the aperture ring and that's that.

And for the record I LOVE my Rikenon lenses!!! I have two.

That being said my A mount Pentax lenses are more flexible because of the above stated reasons... (you can do apertures by the .1 stop)

QuoteOriginally posted by Octi Quote
How about the one in the link then, I saw the P on it, so I guess it is not that good, then.
If there is a little ball bearing looking thing on it that barely protrudes its fine. See the above comments about the "P" mode for Rikenon lenses on modern SLR cameras.

Last edited by alamo5000; 06-13-2012 at 10:54 PM.
06-13-2012, 10:49 PM   #11
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QuoteOriginally posted by mesuper Quote
Which is better a Rikenon 50mm 1:2 lens (Not an XR) its just plain 50mm. Or a Pentax 50mm 1:2? Also what is the difference between a plain Rikenon vs a XR Rikenon? Thanks
There were several 50/2 Rikenons in K-mount with at least three different optical designs. My XR Rikenons are metal build. I believe the others were plastic. I don't know that any of the 50/2 were multi-coated.

Like the Pentax 50/2, I don't know that any are worth premium money. The Pentax would have some advantage due to the SMC coatings. I own the XR Rikenon 50/2 (two copies!) and it is a very sharp lens with great contrast. Unfortunately, it also has very "busy" bokeh.

Here is a link to several photos on my Flickr stream taken with that lens:

Fotostevia on Flickr: XR-Rikenon 50/2


Steve

Last edited by stevebrot; 06-13-2012 at 11:00 PM.
06-13-2012, 10:56 PM   #12
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Oh...and here is a link to my "first impressions" thread on the XR Rikenon 50/2 from way back when...

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/51999-new-arri...ond-three.html


Steve

(FWIW, I much prefer my Auto-Rikenon 50/1.7 (M42) to the XR. It is a very sweet lens and better made too...)

Last edited by stevebrot; 06-13-2012 at 11:02 PM.
06-14-2012, 12:41 AM   #13
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I have a plastic-build (but metal mount) non-XR Rikenon 50mm f/2. It doesn't have a Ricoh pin or an A setting, the aperture ring doesn't have half stops and on digital it's sharp even wide open. On film, it's still sharp in the centre but not so sharp wide open in the area that is cropped off on an APS-C camera, but is good by f/2.8. The bokeh can be jagged.

For the €15 I paid for it, it's a good performer, but it definitely lacks the quality feel and great performance of the M 50mm f/1.7. I have no experience with the Pentax f/2 versions.
06-14-2012, 06:04 AM   #14
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Nearly all brands of 50mm lenses about f2 were excellent back then, and differences were minor. In 1966 we made 16x20 prints from my H1a and 55 2.0 Super Takumar, and compared to my friend's Leica & 50 Summicron (the standard for lens performance for decades). He was amazed that he couldn't tell the difference.
50 mm lens design was quite mature then, and advances since have been mainly in coatings and larger apertures. The exception is the newly announced Leica 50m f2.0 APO Summicron that will be available this fall at about $7,000. It's their "bragging rights" lens that will need future generations of sensors to use it's potential.
06-14-2012, 06:32 AM   #15
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My Rikenon Auto 50/2 and 55/1.8 are both M42, both very sharp, both 'better' than any of my M50/2s. The 55/1.8 easily compares with my SuperTak 55/1.8 and 55/2, Petri CC and Mamiya-Tomioka 55/1.8, Argus-Chinon 55/1.7 -- all are very sharp and render nicely. Main problem: deciding on which lens to grab!

As mentioned, the Ricoh pin (or button) exists but is easily dealt with. If it's the button, no problem. If it's the pin, it's easily removed. A Ricoh 'P' lens is NOT an A-type -- no contacts, no aperture automation other than M-mode stop-down. A third-party "A(P)" lens will have A-type contacts and probably the safe button.

But let's envision a worst-case: You get a lens with the dreaded pin. You mount it on your camera. The pin gets stuck in the AF drive hole. Oh bother. But it's easily fixed -- a thin feeler gage will allow removal of the lens. Then remove the lens base, pull the pin, replace the base, and live happily ever after (until tax time).
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