Home · Register · Join Upload & Sell

Moderated by: Fred Miranda

New fredmiranda.com Mobile Site

New Feature: SMS Notification alert

New Feature: Buy & Sell Watchlist

FM Forums | Leica & Alternative Gear | Join Upload & Sell

2 end

Archive 2010 · Zuiko 35-80/2.8 Conversion

ricardovaste
Offline
• • • •
Upload & Sell: Off

p.1 #1 · p.1 #1 · Zuiko 35-80/2.8 Conversion

Someone recently approached me to make a Sony mount for this lens. I am curious if anyone here has handled one? Is it set up similarly to other Zuiko lenses with regard to the aperture mechanism/mount/etc?

If not, I will post images of it if I get it done, but if "yes" feel free to share any thoughts/info/images :-)

Sep 23, 2010 at 10:33 AM

ricardovaste
Offline
• • • •
Upload & Sell: Off

p.1 #2 · p.1 #2 · Zuiko 35-80/2.8 Conversion

rtester, you've opened one up?

Sep 24, 2010 at 04:40 AM

zuiko
Offline
•
Upload & Sell: Off

p.1 #3 · p.1 #3 · Zuiko 35-80/2.8 Conversion

No, it surely is different, like the one for the 40mm f2 and late 50mm f1,4.
This mount is a very thin slice and does not incorporate the release or DOF button.

But I didn't open any of the 3 I once had... (not at the same time however

Iwert

Sep 24, 2010 at 04:57 AM

ricardovaste
Offline
• • • •
Upload & Sell: Off

p.1 #4 · p.1 #4 · Zuiko 35-80/2.8 Conversion

Hi Zuiko,

You sound like you should know what you're talking about

. I think I know what you mean - the rear mount is very thin, only around 1.5mm at a guest, and you then have the two levers opposite each other that simply 'rest' between the two sides? This is what the 50/1.8 I handled was like atleast.

Sep 24, 2010 at 06:53 AM

Ed Sawyer
Offline
• • • •
Upload & Sell: Off

p.1 #5 · p.1 #5 · Zuiko 35-80/2.8 Conversion

Yes, sounds like the later OM mount. some of the later lenses had the 2-piece mount, as described. Frankly, that mount seems like it was made to save money, and it's more of a pain in the ass to work with if you have to disassemble the lens for service or anything. I have had both types apart before, the early mount is definitely easier to work with.

-Ed

Sep 24, 2010 at 10:56 AM

rtester
Offline
• •
Upload & Sell: Off

p.1 #6 · p.1 #6 · Zuiko 35-80/2.8 Conversion

ricardovaste wrote:
rtester, you've opened one up?

NO, not at all. Actually I have opened about 5 other om but I see am in over my head on this post. I thought you were talking about the basics. I did look up the nomenclature:

http://olympus.dementia.org/hardware/PDFs/35-80mm_f2.8.pdf

Sep 24, 2010 at 05:31 PM

ricardovaste
Offline
• • • •
Upload & Sell: Off

p.1 #7 · p.1 #7 · Zuiko 35-80/2.8 Conversion

rtester, that is brilliant!

Nov 20, 2010 at 08:44 AM

ManWearPants
Offline
• • •
Upload & Sell: Off

p.1 #8 · p.1 #8 · Zuiko 35-80/2.8 Conversion

There are some mechanism just behind the mount. So don't think you will need a spacer. I can send you some photos but seeing that your lens is arriving, it is not necessary.

The thing with OM lenses on Canon is they are easy to remove from adapters. So your target audience will be the Nikon/Sony?Pentaxes and what you have.

Anyone has taken apart this lens for relubricating the zoom and focusing rings? Are they put back the same way they are taken apart or there are some special sequence or procedures to follow?

Nov 20, 2010 at 02:00 PM

ricardovaste
Offline
• • • •
Upload & Sell: Off

p.1 #9 · p.1 #9 · Zuiko 35-80/2.8 Conversion

Hi,

Thanks for your help. I don't think we're on the same page though sadly. If you read the thread, this is regarding a Zuiko to Sony conversion, where you do need a spacer if using a regular M42-Sony adapter as a new mount. However, what I'm asking now is whether you could do an M42 conversion... whether there is enough room to do so. By M42, I mean so that the lens is screw fit (to make it more forward compatable).

This is specifically for someone who contacted me to do the mount swap for him, so I'm just trying to find as many options as possible (as if he's not so keen on the lens after a few months, it would be much easier to sell it in M42 rather than a-mount).

I guess I will just have to give it a go and see if it's possible with my own lens & own expense. I will update this thread when I know more!

Nov 20, 2010 at 02:53 PM

ricardovaste
Offline
• • • •
Upload & Sell: Off

p.1 #10 · p.1 #10 · Zuiko 35-80/2.8 Conversion

Sony Alpha 44.6mm
Olympus OM 46.00mm
M42 Screw 45.46mm

OM-M42 = 0.54mm.

Not a lot of room at all for making a mount, where you can countersink/bore some holes. I wonder how much flexibility the helicoid adjustment would give you with the three screws/tape... Not looking too promising though.

Nov 20, 2010 at 03:47 PM

Michael Gordon
Offline
• • •
Upload & Sell: Off

p.1 #11 · p.1 #11 · Zuiko 35-80/2.8 Conversion

Someone on FM posted a OM-Sony conversion perhaps 6 mos ago. Dave at Leitax was working on a kit. I have not seen it on his site, last I checked.

Nov 20, 2010 at 04:24 PM

ricardovaste
Offline
• • • •
Upload & Sell: Off

p.1 #12 · p.1 #12 · Zuiko 35-80/2.8 Conversion

Strange, Dave @ Leitax told the guy who contacted me that he wasn't going to make any sort of a kit. I'm fine with making a OM-Sony adapter myself, was more curious at the M42 option here but doesn't seem possible..

Nov 20, 2010 at 04:42 PM

Michael Gordon
Offline
• • •
Upload & Sell: Off

p.1 #13 · p.1 #13 · Zuiko 35-80/2.8 Conversion

Found the FM post and one other. Some 6 mos, time does go by.

http://www.pbase.com/pganzel/olympus_8mm_fisheye_converted_to_m42

https://www.fredmiranda.com/forum/topic/832620

Perhaps of interest--too bad about Leitax, been watching for that on occasion.
I strongly suspect the all time best mount surgeons are on this list.
Mike

Nov 20, 2010 at 07:06 PM

ManWearPants
Offline
• • •
Upload & Sell: Off

p.1 #14 · p.1 #14 · Zuiko 35-80/2.8 Conversion

ricardovaste wrote:
Thanks for your help. I don't think we're on the same page though sadly. If you read the thread, this is regarding a Zuiko to Sony conversion, where you do need a spacer if using a regular M42-Sony adapter as a new mount.

My bad. I am not familiar with Sony mount.

rtester wrote:
http://olympus.dementia.org/hardware/PDFs/35-80mm_f2.8.pdf

This is great exploded diagram. I am wondering if anyone knows which is a good grease for lubricating plastic. I applied those that I would normally applied for metal helicoid but it just got too sticky and dry for plastics.

Also, if the part labelled CF984100 in fig 1/2 is responsible for adjusting focus.

Finally, it mentioned some parts are still available. Any idea where they may be available?

Nov 22, 2010 at 03:39 AM

ricardovaste
Offline
• • • •
Upload & Sell: Off

p.1 #15 · p.1 #15 · Zuiko 35-80/2.8 Conversion

No problem. You might want to start a seperate thread about the lubricant as you'll likely get more replies that way

Nov 22, 2010 at 08:22 AM

you2
Offline
• • •
Upload & Sell: Off

p.1 #16 · p.1 #16 · Zuiko 35-80/2.8 Conversion

If there are parts available then John Hermanson (www.zuiko.com) probably either has them or knows where you can obtain them. Likewise he probably can recommend an appropriate lubricant.

ManWearPants wrote:
My bad. I am not familiar with Sony mount.

This is great exploded diagram. I am wondering if anyone knows which is a good grease for lubricating plastic. I applied those that I would normally applied for metal helicoid but it just got too sticky and dry for plastics.

Also, if the part labelled CF984100 in fig 1/2 is responsible for adjusting focus.

Finally, it mentioned some parts are still available. Any idea where they may be available?

Nov 22, 2010 at 08:37 AM

debuggerus
Offline
• • •
Upload & Sell: Off

p.1 #17 · p.1 #17 · Zuiko 35-80/2.8 Conversion

ricardovaste wrote:
rtester, that is brilliant!

Don't know how you found it but thank you!

Okay, so the 35-80/2.8 is on it's way, it has been for a while. Just sent off the customs form yesteryday, so hopefully I'll get it in the next couple of weeks.

I'm looking at the Zuiko I have to hand. I'm if an M42 conversion is possible? (just to make it easier to switch mounts). Seeing as you need a spacer between a Minolta/M42 mount if you're doing it that way, it suggests there is a bit of room to play with... I wonder if there is enough...Show more →

Richard,
This should be doable. I have done a few zuikos to M42 (21/3.5, 28/3.5, and 40/2) and don't recall any particular problems while doing it. All I did was replacing the OM mount with an M42 mount and adjusting infinity focus.
The only thing that was a little difficult for me was to find spare M42 mounts. I had to cut them from a few broken takumars. Do you have source to obtain M42 mounts?
Let us know how it goes. It's one of the lenses I've always wanted.
P

Nov 22, 2010 at 10:03 AM

ricardovaste
Offline
• • • •
Upload & Sell: Off

p.1 #18 · p.1 #18 · Zuiko 35-80/2.8 Conversion

Thanks Phuc. I do plan on taking some photos along the way as it's an interesting lens I think. I'm not sure about what I'll use or how I'll go about it, but when I've found something useful/got something to report it'll be posted here

. Should expect somethingin the next week or two I think, depending upon on how customs decide to hold it for.

Nov 22, 2010 at 10:13 AM

ManWearPants
Offline
• • •
Upload & Sell: Off

p.1 #19 · p.1 #19 · Zuiko 35-80/2.8 Conversion

ricardovaste wrote:
No problem. You might want to start a seperate thread about the lubricant as you'll likely get more replies that way

It's related to OM 35-80. Hope you do not mind. Anyway, I have gotten the answer from You2.

Thanks You2.

Nov 22, 2010 at 02:03 PM

ricardovaste
Offline
• • • •
Upload & Sell: Off

p.1 #20 · p.1 #20 · Zuiko 35-80/2.8 Conversion

Just got the 35-80/2.8 Zuiko, but noticed the aperture didn't seem right. Put it on a OM-1n. The aperture blades don't seem to go "wide open" or to 2.8. They seem closed down a little. I can use the DOF preview button on the lens, and it stops down fine, but it never seems to go to 2.8. Is this normal? Anything I could be doing wrong?

Just want to make sure everything is "okay" before I open it up and investigate.

Dec 10, 2010 at 12:10 PM

1 2 end
FM Forums \| Leica & Alternative Gear \| Join Upload & Sell 1 2 end

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.