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Riku
Joined: 23 May 2007
Posts: 1059
Location: Finland
Expire: 2017-04-30
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 Posted: Wed Dec 10, 2008 8:47 am Post subject: Ricoh mount lenses - is pin removal needed? |
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Riku wrote:
I just bought Rikenon P 50/2 "pancake"
Ricoh mount is the same as Pentax K except there is a small pin that can get the lens stuck on Pentax DSLR. I googled and found good instructions removing the pin. But some people said that it wont get stuck if the pin is round shaped without sharp edges. Any experience? |
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Helios
Joined: 05 Jan 2008
Posts: 537
Location: East of France
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| Posted: Thu Dec 11, 2008 1:44 pm Post subject: |
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Helios wrote:
Remove it ... It's safer ! I got no problems with 3 lenses (2 zooms and a 28mm) but I removed it on the 3 . That's a Dslr life insurance .... 
About pancake's : I have a Revuenon (clone of the chinon-cosina) 2,8/45mm . Excellent ! |
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Riku
Joined: 23 May 2007
Posts: 1059
Location: Finland
Expire: 2017-04-30
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| Posted: Thu Dec 11, 2008 2:04 pm Post subject: |
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Riku wrote:
Thanks! But I'm a risk taker. Let's see when I receive it... maybe I end up shooting years with the same lens  |
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Ballu
Joined: 28 Feb 2007
Posts: 912
Location: Columbus, OH. USofA
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| Posted: Thu Dec 11, 2008 7:26 pm Post subject: |
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Ballu wrote:
| Helios wrote: |
| .......I have a Revuenon (clone of the chinon-cosina) 2,8/45mm . Excellent ! |
I just got Petri 45mm f2.8, may be similar to yours... But I will not say pancake to that (although I bought that with pancake in mind)... Soft wide open... (relative term... sorry, I compare the lens with CZ planar 50mm f1.7  )... but becomes similar to Planar in sharpness by f8 (or may be little earlier too...
But the lens in size is similar to Nikon Series-E 50mm f1.8 and Oly Zuiko 50mm f1.8 (one of the sharpest 50mm lens, I have.. but bad highlight bokeh)...
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-Ballu
http://balyanpage.blogspot.com/ |
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nemesis101
Joined: 25 Mar 2008
Posts: 2050
Location: Oregon USA
Expire: 2015-01-22
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| Posted: Thu Dec 11, 2008 10:31 pm Post subject: Risk NOT worth it. |
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nemesis101 wrote:
I have loads of Ricoh lenses, and Sears Ricoh-fits as well... If one uses them on a KAF2 mount or indeed most any autofocus Pentax mount, the pin engages with the autofocus lug at about 1/3 rotation and then you are in (if you are lucky) for hours of 'fun' with a very very fine feeler guage, with the 'best' result being a badly scratched mount and lots of 'lovely' metal shards to ruin your sensor, and at worst well..
So DO NOT risk it when removing the pins takes 5 minutes and is totally reversible (if you don't mislay them!) ??
Doug.
| Riku wrote: |
| Thanks! But I'm a risk taker. Let's see when I receive it... maybe I end up shooting years with the same lens |
_________________
Lenses and cameras:
Amateurs worry about equipment
Pros worry about money,
Masters worry about light.
Last edited by nemesis101 on Fri Dec 12, 2008 12:56 am; edited 1 time in total |
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Rob Leslie
Joined: 20 Mar 2007
Posts: 1103
Location: UK Swindon
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| Posted: Fri Dec 12, 2008 12:31 am Post subject: |
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Rob Leslie wrote:
Yes I agree with the other posts. Don't risk it. Don't even be tempted to try it. Remove the pin.
I have only had one Ricoh mount lens and it took a few minutes to remove the pin. It took less time to put it back when I found the lens wasn't much good and I sold it on.
(The lens was the 60-300mm)
_________________
Pentax K10D & K100D. Many Tamron Adaptall SP lenses, Fujinon f4.5 400mm. A loved Lens Baby 2, Lubitel triplet +++ and many film cameras. Mainly a Digital user inc G5, GR2
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Riku
Joined: 23 May 2007
Posts: 1059
Location: Finland
Expire: 2017-04-30
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| Posted: Fri Dec 12, 2008 9:57 am Post subject: |
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Riku wrote:
Okay, you talked me out from it. I hope the screws are not too tight. |
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Riku
Joined: 23 May 2007
Posts: 1059
Location: Finland
Expire: 2017-04-30
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| Posted: Mon Dec 15, 2008 1:47 pm Post subject: |
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Riku wrote:
I knew something would go wrong I opened the screws and lifted the mount. The pin just fell off and I put the mount back. BUT... now aperture ring has no stops, it's just rotating freely. Lens stops down correctly. What do you think happened? |
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Jieffe
Joined: 04 Nov 2007
Posts: 754
Location: Belgium
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| Posted: Mon Dec 15, 2008 2:23 pm Post subject: |
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Jieffe wrote:
| Riku wrote: |
| I knew something would go wrong I opened the screws and lifted the mount. The pin just fell off and I put the mount back. BUT... now aperture ring has no stops, it's just rotating freely. Lens stops down correctly. What do you think happened? |
You also lifted the aperture ring and lost the little ball responsible for the "click"... |
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Riku
Joined: 23 May 2007
Posts: 1059
Location: Finland
Expire: 2017-04-30
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| Posted: Mon Dec 15, 2008 2:38 pm Post subject: |
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Riku wrote:
| Jieffe wrote: |
| Riku wrote: |
| I knew something would go wrong I opened the screws and lifted the mount. The pin just fell off and I put the mount back. BUT... now aperture ring has no stops, it's just rotating freely. Lens stops down correctly. What do you think happened? |
You also lifted the aperture ring and lost the little ball responsible for the "click"... |
Yes! Little ball fell off too. I thought that might have been the reason. Now where exactly that belongs? I'm not really a "do it yourself" kind of person. By the way, the lens seems very sharp in my first test shots, but is not really a "pancake" lens, only a little smaller than Pentax-M 50/1.7. I'm going test these lenses tomorrow.
Edit: I fixed it
Last edited by Riku on Mon Dec 15, 2008 3:11 pm; edited 1 time in total |
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Jieffe
Joined: 04 Nov 2007
Posts: 754
Location: Belgium
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| Posted: Mon Dec 15, 2008 3:11 pm Post subject: |
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Jieffe wrote:
| Riku wrote: |
| Yes! Little ball fell off too. I thought that might have been the reason. Now where exactly that belongs? |
I have the f1.7 version (I think). The aperture is sticky, that's a good opportunity to open the lens. I'll look where is supposed to be the "click ball" (usually in a little groove under the aperture ring) ... more later when I'll be back home  |
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Riku
Joined: 23 May 2007
Posts: 1059
Location: Finland
Expire: 2017-04-30
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| Posted: Mon Dec 15, 2008 3:13 pm Post subject: |
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Riku wrote:
Thanks but I fixed it already! After I dropped the little ball on the floor and spent 15 minutes searching for it |
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Jieffe
Joined: 04 Nov 2007
Posts: 754
Location: Belgium
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| Posted: Mon Dec 15, 2008 5:05 pm Post subject: |
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Jieffe wrote:
| Riku wrote: |
| Thanks but I fixed it already! After I dropped the little ball on the floor and spent 15 minutes searching for it |
A lesson I learned the hard way ... always disassemble a lens over a cloth (I use a microfiber cloth) if you don't want to spend the next 15 minutes on your knees searching for a microscopic item  |
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Screamin Scott
Joined: 13 Oct 2007
Posts: 1014
Location: Dallas, Georgia USA
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| Posted: Mon Dec 15, 2008 5:14 pm Post subject: |
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Screamin Scott wrote:
"After I dropped the little ball on the floor and spent 15 minutes searching for it"
It helps to have a magnet handy to find those little parts that do manage to find their way to the floor...
_________________
Cameras-Nikon D300, D7100,D610,FE2,FTN ,FT2,N90s, Olympus Pen EP-3 & Olympus OM-D E-M10
Nikkor AF Zooms=28-105/3.5D,28-70/3.5D,35-135/3.5, et al
Nikkor AF //50/1.8,//Nikkor MF//50/2ai,50/1.8ais 50/1.4ai,24/2.8ais,28/2.8ai,28/3.5ai,55microAis/2.8,105/2.5ai,200/4ai,300/4.5ai35-135/3.5Ais,et al
Kiron /Kino made lenses//70-210/4ai,28-105/3.2ai,30-80/3.5ai,Viv 28/2ai,35-85/2.8aiVivS1,105/2.8Ais Dine,24-48/3.8ai VivS1,50-150/3.8aiViv,28-85/2.8aiViv,100/2.8Nai Viv,70-210/3.5Nai Viv,28/2.5ai Viv Komine made Viv//24/2Ais,135/2.8aiCF,28-50/3.5ai,28-90/2.8ai Viv S1,80-200/4.5aiCosina made Viv 19/3.8 Ais...Also Sigma 24/2.8 Ais Tokina made24/2.8ai VivAF Sigma 21-35/3.5,& other lenses... A link to some of my Flickr albums...
https://www.flickr.com/photos/screaminscott/albums |
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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| Posted: Mon Dec 15, 2008 7:46 pm Post subject: |
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peterqd wrote:
| Screamin Scott wrote: |
"After I dropped the little ball on the floor and spent 15 minutes searching for it"
It helps to have a magnet handy to find those little parts that do manage to find their way to the floor... |
I second that. My magnet has got me out of trouble countless times. It originally started life as a means of attaching a mobile phone in the car, but I never used it. I can't believe its power/size!
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Riku
Joined: 23 May 2007
Posts: 1059
Location: Finland
Expire: 2017-04-30
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| Posted: Mon Dec 15, 2008 7:50 pm Post subject: |
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Riku wrote:
Thanks for the tips. Maybe I will open more lenses in the future. A few needs to be cleaned up. |
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