Having trouble identifying a lens...!!


stub

Link Posted 28/11/2018 - 12:49
A while back I wanted to see what the rant about film lenses was all about...lol And to fit to my K1 at the time I needed a cheap wide angle lens. As all my APSC lenses were vignetting. So to fit to my K1. I bought this Vivitar 28mm f 2.8 lens for a fiver. Certainly not expecting too much.

But Sssh...! Dont tell anyone, I loved it.. Even the manual focus didnt put me off...lol Well you have a bit more time when your landscaping...lol

Anyway back to the point. Just been reading this blog on the lens... http://photografica.robinparmar.com/vivitar.html and couldnt work out which model I own ? It brought up to me a few points..
1 How do you identify the Pentax K mount version on a lens...?
2 Does the R/pk mean it was a Ricoh lens ? Tere was no pin in the mount,..
3 What does the "P" mean on the aperture ring.. I should know this...!!
4 Maybe it isnt a Pentax lens at all. Just has a Pentax mount...?

Seems its a Komine made.. Worked that out at least....lol

And note to self.. Might be a good idea to clean the lens a bit before posting images on the net....!!





K-1Gripped K-1 ungripped K-5ii K7 Various lenses

Stuart..

JAK

Link Posted 28/11/2018 - 13:17
My suggestions FWIW:

I'd say it's his K02 http://photografica.robinparmar.com/vivitar28detail.html#K02

Quote:
1 How do you identify the Pentax K mount version on a lens...?

By the P/K. The R is for Ricoh and it does have the pin on that lens. Fortunately it was not protruding enough to get stuck on your camera body. Potentially it could though.
See here.

Quote:
2 Does the R/pk mean it was a Ricoh lens ? Tere was no pin in the mount,..

Well yes, it would work on both. From your photo it would appear there is that Ricoh pin.



Quote:
3 What does the "P" mean on the aperture ring.. I should know this...!!

It's for when it's used on Rocoh's XR-P camera which had several modes of programmed autoexposure, when used with P lenses. http://camera-wiki.org/wiki/Ricoh_XR-P

Quote:
4 Maybe it isnt a Pentax lens at all. Just has a Pentax mount...?

As you can see, yes & no ! Definitely not a Pentax lens per se, it's a Vivitar lens designed to fit Pentax & Ricoh K mount cameras in 1984, in particular the Ricoh XR-P.
John K
Last Edited by JAK on 28/11/2018 - 13:28

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bforbes

Link Posted 28/11/2018 - 13:31
Back in all manual focus film days the K mount was supposed to become the "standard" across all manufactures. It just didn't work out, but Ricoh was one company that did adopt the k mount for it's DSLR range.

So getting back to your lens
"Does the R/pk mean it was a Ricoh lens ? " I think it is a Ricoh lens with K mount
"Tere was no pin in the mount,.." the Pin did not become an issue until Auto focus was introduced
"What does the "P" mean on the aperture ring.. I should know this...!! it's Ricoh's version of Pentax A. Your second picture shows the contact bottom left but it's not in the same place as a Pentax contact
Barrie
Too Old To Die Young
.
Pentax K1 K5-IIS K-01 K20D A50/2 A50/1.7 DA10-17 DA18-250 DA18-135 DA18-55 DA300 DA40 DA50-135 DA50-200 DA55-300 DA70 F35-70 DFA150-450 FA20-35 FA100 FA135 FA35 FA28 FA43 FA50 FA77 K55/1.8 M135/3.5 M200/4 M28/3.5 M28/2.8 M40/2.8 Q 01 02 MX-1 I-10 Sigma 15 24 105 180 8-16 10-20 17-35 17-50/2.8 24-70 400/5.6MF Tamron 70-200/2.8 17/3.5MF 24/2.5MF 28/2.5MF 90/2.5MF


http://www.pentaxphotogallery.com/artists/barrieforbes

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johnha

Link Posted 28/11/2018 - 15:16
Most independent 'KA' lenses are dual Pentax KA & Ricoh P (Program) mounts and have both sets of pins. This appears only to have the Ricoh pin. As above, the 'P' on the aperture ring is Ricoh's version of 'A' on KA lenses.

General wisdom from the web would suggest you need to remove the Ricoh pin. I have removed mine (see below). The profile of pins seems to vary by manufacturer from fairly 'sharp' to smooth & rounded (as does the 'sprung' mechanism pushing them out).

I'd recommend this procedure for removing it (takes 5 mins): link

John.
PPG Flickr

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vic cross

Link Posted 28/11/2018 - 15:57
Stuart. Follow Johns link and you can't go wrong. I bought a Vivitar PK-A/R 24mm f2.8 many moons ago to go on my Z1p and this had the "PIN". It really is a simple job to remove it.
CHEERS Vic.
Born again biker with lots of Pentax bits. Every day I wake up is a good day. I'm so old I don't even buy green bananas.

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JAK

Link Posted 28/11/2018 - 16:20
Quote:
As above, the 'P' on the aperture ring is Ricoh's version of 'A' on KA lenses.

Yes it is. That lens isn't the same as Pentax A as it doesn't have the Pentax version electrical contacts. The P setting is a dedicated Program function for the XR-P. Otherwise it will work as a manual Pentax K / M lens.
Read the XR-P camera manual here for an explanation: https://www.butkus.org/chinon/ricoh/xr-psingle/ricoh.htm
(Guess OK to link to Ricoh things from here nowadays!)
As stub has the lens, what happens when set to P? Does it set auto settings? I suspect it can't on a Pentax, even if it is a Ricoh built one!
John K
Last Edited by JAK on 28/11/2018 - 16:22

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stub

Link Posted 28/11/2018 - 17:14
Well I'll go to the foot of our stairs...!! As we say up here in the north.. I'd honestly never noticed the pin. I will be be removing the said item immediately.. !! Thanks for the link John.. Certainly a lot smaller a pin than the one I had on a 135mm lens donkies years ago, for a ME Super..!! lol

Quick try out.. Your correct John the "P" seems to have no function. Certainly on the K1 at least... Just shows F-- Doesn't operate equal to the "A" function. But I dont mind that. I was happy to use it full manual mode.. Makes you stop and think sometimes what you are doing....




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K-1Gripped K-1 ungripped K-5ii K7 Various lenses

Stuart..
Last Edited by stub on 28/11/2018 - 17:16

JAK

Link Posted 28/11/2018 - 18:55
If the pin isn't causing a problem perhaps it doesn't matter with that one. Some pins protrude more than others. If you can remove it easily then probably best.
Any images from it you can share?
John K

swarf

Link Posted 28/11/2018 - 19:06
I have the Pentax version of this lens (Komine - A03) that I bought back in the mid 1970s. I love it and use it from time to time. The build quality is fantastic, as is the resulting image quality. I love using it. If you find a cheap one - buy it!

Phil
K-5iiS; K-r; ME Super; ME; DA* 16-50 f2.8; DA 18-135 WR; DA 55-300 WR; HD DA 15mm F4 ED AL Limited; FA 50mm f1.4; A50mm f1.7; DAL 18-55mm; M40mm f2.8; + assorted non-Pentax lenses

My Flikr Page link

stub

Link Posted 28/11/2018 - 21:09
Im not so sure this is a good idea... I'm certainly not the photographer you guys are....!! Lol

But what the hell here goes...!!

These were taken on a trip to Whitby.. !! First one straight out of the camera. Others with what I call processing... Ill get my coat now...lol


K-1Gripped K-1 ungripped K-5ii K7 Various lenses

Stuart..

pschlute

Link Posted 28/11/2018 - 21:10
Well, they look mighty fine to me.
Peter



My Flickr page

stub

Link Posted 28/11/2018 - 21:51
Thanks Peter..
K-1Gripped K-1 ungripped K-5ii K7 Various lenses

Stuart..

alfpics

Link Posted 28/11/2018 - 22:13
pschlute wrote:
Well, they look mighty fine to me.

I agree!
Andy

JAK

Link Posted 28/11/2018 - 22:55
alfpics wrote:
pschlute wrote:
Well, they look mighty fine to me.

I agree!

So do I, thanks for sharing. That lens seems to have been a good find.
John K

bforbes

Link Posted 29/11/2018 - 00:12
Nowt the matter with them
Barrie
Too Old To Die Young
.
Pentax K1 K5-IIS K-01 K20D A50/2 A50/1.7 DA10-17 DA18-250 DA18-135 DA18-55 DA300 DA40 DA50-135 DA50-200 DA55-300 DA70 F35-70 DFA150-450 FA20-35 FA100 FA135 FA35 FA28 FA43 FA50 FA77 K55/1.8 M135/3.5 M200/4 M28/3.5 M28/2.8 M40/2.8 Q 01 02 MX-1 I-10 Sigma 15 24 105 180 8-16 10-20 17-35 17-50/2.8 24-70 400/5.6MF Tamron 70-200/2.8 17/3.5MF 24/2.5MF 28/2.5MF 90/2.5MF


http://www.pentaxphotogallery.com/artists/barrieforbes
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