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[EdMika]

My moving flexible ring idea does not depend on glass to glass contact to move the last element, a bottom lip of my "EdTraveller" matches up to the thin metal ring around the moving lens group. I feel I will be able to keep perpendicularity within acceptable levels and there will be no risk of the rear lens element popping out either. Right now my biggest problem is the materials like nylon and Devron we have been experimenting with are too rigid and fragile. We have ordered 2" diameter cylinders of polypropylene type materials that should be arriving tomorrow but my father-in-law is concerned that the softer material will be harder to machine since it distorts more and has a tendency to hang on to the cutting chips which will make it hard to get a good finish.

The 5D3 mirror is slightly lower profile than the 5D2 mirror thankfully. The base FD 55mm 1.2 SSC without separate rear lens almost makes it to infinity before lens to mirror contact where the 5D2 hits at just before 10 meters, since I can keep the separate rear lens of the Aspherical a hair closer to the focusing set, I can get infinity focus with the Aspherical on the 5D3 without mirror contact. Since I expect many serious enthusiasts interested in manual lenses worldwide will be using the 5D2 for years I have to design with that camera firmly in mind.

Yeah Marcus, that 85L is a real beast to get that lever out eh. I'm going to do a (probably very long) video of me (trying) to put it together again in original condition. I need to do this in order to make the instructional video of how to do the conversion using my kit. Similar to the ones I did here for the FD 55 1.2 http://www.youtube.com/watch?v=HT20ozVh8Y0 the TS 35 2.8, http://www.youtube.com/watch?v=_--po9ppBdY, the FL 55 1.2, http://www.youtube.com/watch?v=dDhG0CWAJY0 and how to do the focus calibrations on the super telephoto lenses using my low profile 0.75 and 0.5mm FD-EOS adapters http://www.youtube.com/watch?v=Ytgt1d1Ts8I

Also, FDn lenses that I think will be great on EOS

7.5/5.6, 14/2.8L, 15/2.8, 24/1.4L/2, 28/2, 35/2, 50/3.5macro/1.4/1.2/1.2L, 85 SF/1.8/1.2L, 100/2/2.8macro, 135/2, 200/2.8/4macro, 300/4/4L

85-300, 50-300L, 20-35L, 80-200L

Of course all the white super telephotos already work on EOS with my 0.5mm adapter and can go back to FD film in seconds. A permanent lens mount swap is impractical because removal of the pivot mounted aperture lever is challenging.

[hinnerker]

Whoops, looks like I erased my previous post, I have to learn the german words for edit lol.

I think the most important thing I talked about being able to have good perpendicularity by having movement of the plastic flexing part driven by full contact with the metal ring around the focusing lens group.

Also, FDn lenses that I think will be great on EOS

7.5/5.6, 14/2.8L, 15/2.8, 24/1.4L/2, 28/2, 35/2, 50/3.5macro/1.4/1.2/1.2L, 85 SF/1.8/1.2L, 100/2/2.8macro, 135/2, 200/2.8/4macro, 300/4/4L

85-300, 50-300L, 20-35L, 80-200L

Of course all the white super telephotos already work on EOS with my 0.5mm adapter and can go back to FD film in seconds. A permanent lens mount swap is impractical because removal of the pivot mounted aperture lever is challenging.

The german word for EDIT = Bearbeiten

You wrote..

.. 50/3.5macro/1.4/1.2/1.2L..

Do you mean the normal nFD 50/1.2 lens?..

Is there a modification especially for that lens? I did the conversion of this lens and reported the result here:

http://www.digicamclub.de/showthread...Canon+1.2%2F50


Its a very fine lens.. indeed. Due the intrusion of the rear lens element in conjunction with his diameter (37,15 mm) its not possible focus to infinity on 5D MKII and also in LiveView-Mode it is not possible to focus distances greater then 5 meters, because of the mirror-box limitations on 5D MKII.

That was one of the reasons, why i did sell this very fine lens to a member of this forum and finally this lens now work on an EOS Crop cam, where everything works fine.. IMHO definetely not usable on a 5D cam,

How did you manage this problem, if your kit is really universal usefull?

Whats about the Canon 24-35mm/3.5 L Zoom lens?

http://www.digicamclub.de/showthread.php?t=15139

For this lens, also on the 35mm/2 SSC Breech Lock, the user has to shorten/clear the rear lens holder by himself, if the lens is adjusted to infinity.
Otherwise the mirror on a 5D MK 1 and MK II will hit the lens holder/Lock..

35/2 SSC with "cleared rear lens holder"



24-35/3.5 L without clearence, you can only use the lens from 26mm to 35mm.. on a 5D



Thats what a user has to do with the rear lens holder.. to reach the complete range from 24-35mm



So this are works, the user has to do, if he wants to reach infinity on that shown lenses on a 5D ..

Or do you deliver new parts for the rear with your conversion kit?


And a final question.. what happend if the old screw in the Threads are rot and the user has to drill new holes?

Often the screws are hard to disengage from the lens body.. about 25 percent of the lenses do have this problem.
Is there a hint from you to help the user dismantling the old mount without lost of the old screws and the need to drill new holes?..

I think, there are a lot of problematical things, depending on the type of lens a user wants to convert, which a "universal mount" cant resolve.

So every type of lens needs his own conversion process.. but its a nice thing to know, that some lenses are easy to convert.. especially the 55mm/1.2 SSC.

I really like the lens and started my own experience in lens conversion with that lens, years ago.

Unfortunatelly the price of the kit is very high, if we add the german tax..

Cheers
Henry

[EdMika]

Unfortunately the price of the kit is very high, if we add the german tax..


Every adapter package I send out is marked as 49 dollars value. My rationale is that this figure covers purely the material/chip costs of the kit where the rest is for my labour/life time assistance with installation and usability issues, a fair and honest argument I believe. It also obviously reduces customs fee impact worldwide.

I'm also trying to automate my production so I can start to lower prices. I expect Chinese copies to come out that I know I can compete with quality wise but will have to do better with prices in the not too distant future. In a full work day only 10-15 adapters can be produced right now. With a second machine coming and with automatic tool change capability (exactly this one http://www.youtube.com/watch?v=9X5AS...ure=plpp_video) this should more than double without requiring me or my father-in-law to be 100% at the machine during production.

As for the term "universal" FDn mount. You are right, it is not universal, every lens has its own unique issues with aperture lever connection and many will have 5D mirror interference issues. When I do start to sell kits, they will all still be very lens specific and will clearly list issues and incompatibilities with certain camera bodies.

As for screws, I usually provide new ones. This way people can drill the heads off and then put vise grips on the studs. Also heating up the screw with a soldering iron with some solder on it has helped releasing some really tight fit screws without breaking them for me.

I expect a kit for the 24-35 as well but I'll start with the 20-35 first.

[hinnerker]

Unfortunately the price of the kit is very high, if we add the german tax..


Every adapter package I send out is marked as 49 dollars value.

Unfortunately the customs often wants to see the ebay-transaction documents.. that doesnt help any longer, mostly the declaration is not thruth for them.
So they start long time ago to show the transaction details on custom office.

My rationale is that this figure covers purely the material/chip costs of the kit where the rest is for my labour/life time assistance with installation and usability issues, a fair and honest argument I believe. It also obviously reduces customs fee impact worldwide.

I'm also trying to automate my production so I can start to lower prices. I expect Chinese copies to come out that I know I can compete with quality wise but will have to do better with prices in the not too distant future. In a full work day only 10-15 adapters can be produced right now. With a second machine coming and with automatic tool change capability (exactly this one http://www.youtube.com/watch?v=9X5AS...ure=plpp_video) this should more than double without requiring me or my father-in-law to be 100% at the machine during production.

As for the term "universal" FDn mount. You are right, it is not universal, every lens has its own unique issues with aperture lever connection and many will have 5D mirror interference issues. When I do start to sell kits, they will all still be very lens specific and will clearly list issues and incompatibilities with certain camera bodies.

As for screws, I usually provide new ones. This way people can drill the heads off and then put vise grips on the studs. Also heating up the screw with a soldering iron with some solder on it has helped releasing some really tight fit screws without breaking them for me.

I expect a kit for the 24-35 as well but I'll start with the 20-35 first.

Thanks again for your detailed informations. Keep us informed about new developments.. and good luck for your business.

Cheers
Henry

[optikus64]

Hi Ed,

the procedure in germany is as follows:

a./ if the customs office at Frankfurt/Airport (example for my case in Bad Ems) is not interested, the put a green button on the parcel "free from customs treatment" and give the parcel to the forwarding company. Nothing more happens. You get the parcel as sent.

b./ if customs office is interested the open the parcel and expect to find a bill. If there is none or it's declared as a gift the have a look on what is inside. If they decide that it looks to be commercial product the search it - if they find the price declared they calculate the fee and the forwarder brings the parcel with the fee to pay - or you get a postcard from customs to pick the parcel up at the customs and bring with you the orderpapers and the bill -> ebay-copy. If they determine massive differences between the "formal bill" in the parcel and the real price, the begin to lokk what is to find more - not the best situation there ... :( - and your next parcels are visited nearly all.

c./ UPS is solution b./ in the most cases.

d./ DHL was a./ in the most cases I had in the past.

Calculation is easy:

billing prize + tranport cost * 19% is the tax, and something nearby 3% is the charge for import.

Jörg

[CChris]

Hey Ed, nice to see you here.

As I've personally converted and modified about a dozen lenses, I apreciate your efforts to ease any step of that process - especially with well-thought and well-engineered products.
Your 'little collection' of canon-gear sets new standards, to say the least

I can't help you with knowledge regarding the whole mirror-issue, as I own a Canon 50D crop camera.

Concerning your A-list of lenses you mentioned:
I'm not completely sure of the nFD-Version of the 2/35, but the S.S.C.-Version* I converted just ROCKS. Easily one of the best primes I owned. I like the bokeh and it's sharp enough for the demanding crop-sensor like the one of the 50D shortly after f/2.0.
That one definitely belongs to the A-list.
*(the one of the three without radioactive elements)

On a side note, probably related to my copy:
I've yet some problematic front-group mechanics of the floating system to examine on the 2/35, where presumably some degraded plastic parts are responsible for unwanted tolerances of the front group.. I've encountered the extreme version of that issue in a Tamron zoom lens I repaired. There is not much that can be done against this issue, as it purely seems to be natural decay of plastics-related.

Another one of your A-list:
I got the 1.4/50 S.S.C. for a fine price because of stuck aperture blades. While chromatic abberations (showing mostly as purple in f/1.4 photos in bright daylight) are noticeable at f/1.4, those disappear quickly. It deserves a place in the A-list as well - not everybody wants to pay for f/1.2.

Side note: the lens has less problems (especially at sharpness) at close range than another good 1.4/55 for M42 I compared it against.
May have been a special weakness of that lens, but I assume that the 1.4/50 is just thoroughly designed.



I don't have the 3,5/50 Macro, but I've seen the reports of Hinnerker, the MTF graphs and the compared MTF graphs of a Zuiko 3.5/50 Macro I worked with. And those clues say that the 3.5/50 Macro rocks as well and should be thoroughly tested by you