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07-03-2011, 10:23 AM   #1
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Rikenon family portrait

I shot this several months ago, at the peak of my collection. The 50/2 gets a fair share of use, it's quite nice as long as the sun or other strong light isn't making it flare.

If Ricoh brought a few of these back, with modern coatings (and no mounting pins)?



07-23-2011, 04:42 PM   #2
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Are those all KR-mounts? My few Rikenons are M42 (and were cheap): 50/2 (US$10), 55/1.8 ($6), 135/2.8 ($10). No pins! No worry! Yeah, bring them back as KM's, eh?
07-23-2011, 05:19 PM   #3
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Rikenon P Zoom 1:3.4~4.5 35~70mm Macro
The 1986 Lens brochure says 185 gram amd 63 dia by 50 mm long, 52 mm ring.
Is this the smallest K mount zoom?
07-23-2011, 06:12 PM   #4
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QuoteOriginally posted by wombat2go Quote
Rikenon P Zoom 1:3.4~4.5 35~70mm Macro
The 1986 Lens brochure says 185 gram amd 63 dia by 50 mm long, 52 mm ring.
Is this the smallest K mount zoom?
Hmmm, that is an interesting question.

* The SMC-F 35-70/3.5-4.5 is the same size as the Rikenon-P but weighs about 40g more -- because it is AF?

* The SMC-A 35-80/4-5.5 is the same size and weight as the Rikenon-P -- but it is a lousy piece of plastic crap.

Those are my two smallest zooms. I haven't the specs on other zooms (and I'm too lazy to check the database here) but when I look at my booklets of K and FA and DA lenses, I see:

* The SMC-FA 35-80/4-5.5 is slightly larger than the Rikenon-P but weighs 25g less -- and it's still plastic crap.

So of K and FA and DA zooms, the crappy FA35-80 is the lightest and the superb F35/70 is the smallest, but neither beats your Rikenon-P. OK, I just glanced through the lense database, and I don't see that any others are smaller+lighter that the Rikenon. You have the winner!

07-23-2011, 07:13 PM   #5
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QuoteOriginally posted by RioRico Quote
Are those all KR-mounts? My few Rikenons are M42 (and were cheap): 50/2 (US$10), 55/1.8 ($6), 135/2.8 ($10). No pins! No worry! Yeah, bring them back as KM's, eh?
These are indeed all KR bayonets. Seems the 'P' series did that, though how they implemented any automation in P mode eludes me. Guess the aperture rotation bar was somehow controlled in-cam?

I could now add my Sears 50/1.4 to this mix, it's a rebadged XR Rikenon for sure. I had a 50/1.7 for a while but let it go. This 1.4 is a beautiful lens as long as bright light sources don't cause any flare. It cost me a bit over $50, the 50/2 was $16. I really like the 52mm filter size on their fifties, I have many more lenses with 52 than 49mm. My 'best' deal was the 28-100, it came with a wad of cash included, in the form of an apparently-unused K1000 body that KEH bought from me later. That 28-100 is a tired and heavy lens though; the best zoom of the three is easily the 35-135.

Last edited by jimr-pdx; 07-23-2011 at 07:19 PM.
07-23-2011, 07:18 PM   #6
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Good thread, jimr
Yes, Rio I have had the Rik P Zoom 1:3.4~4.5 35~70mm Macro back end apart to remove the dreaded pin.
It is plastic including the element housings but it does have a metal K mount, the runners appear to be robust
and the thing feels good to use compared to the ones you mention.
Its a good one if travelling light with a dslr and slr body.
I use it quite a lot. I will do the "fence test" to see its sharpness out in the corners at 50 mm compared to the XR Rikenon 1:1.4 50 mm.
07-24-2011, 07:19 AM   #7
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The "fence test" shows the Rik P Zoom 1:3.4~4.5 35~70mm at 50 mm
Wide Open
https://www.box.net/shared/e0f7el4nt62vx6is2u43
f/8
https://www.box.net/shared/yhsn1h0zt18zix40z5k7

compared to
Rik XR 1:1.4 50mm at f/4
https://www.box.net/shared/iada51c2ublkjgznvkcs

The P Zoom is certainly a winner for light and small, but quite difficult for me to focus.

An older generation blunderbus Sun zoom has 25 mm of rotation between 5 metre and infinity.
whereas the Rik P zoom only has about 3 mm of rotation for same range.
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