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Archive 2007 · OM to EOS focus confirm adapter?

  
 
Stu Warner
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p.1 #1 · OM to EOS focus confirm adapter?


Hi everyone,

Can anyone recommend a good source for an Olympus Zuiko to Canon EOS adapter
I want to get one which activates the red focus point lights in the viewfinder when focus is acheived manually. Infinity focus is essential of course.


I've seen pictures of a few examples manufactured in China, but the resolution of the pictures are so poor that I really can't get a good idea about build quality. I normally would just take a chance, but the electronics necessary for focus confirmation seem to increase the price quite a lot.

Anyone have any good experiences?




Dec 02, 2007 at 03:59 PM
pixelpix
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p.1 #2 · OM to EOS focus confirm adapter?


I have one with EXIF coding in place and I purchased it from seller "happypagehk" on eBay. The adapter looks much the same as the cheaper ones displayed on ebay, but this seller was recommended and the EXIF is encoded.... if that actually helps or not I dunno??

The adapter works and the there are no clearance or infinity focus problems on my 1Ds2 or 20D. After using it a bit lately I find that it's not very accurate for critical focus, as the focus confirm light stays on for a couple of degrees rotation of the focus ring. So it is possible to focus past accurate focus if you are not careful. I don't see this as an adapter issue, more one associated with the cams AF doing something it was not really designed to do.

This is not a problem with landscape with heaps of DOF, but macro and shallow DOF portraits are a different kettle of fish and here I would rather use my Kindai adapter and my split screen for focus.

Just a few days ago I had a bit of a blurb on my blog about this... http://russellspixelpix.blogspot.com/2007/11/focus-confirm-adapters-vs-split-screen.html



Dec 03, 2007 at 01:55 AM
Stu Warner
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p.1 #3 · OM to EOS focus confirm adapter?


Thanks Russell, that was an interesting read. I think I'm going to have an even worse time than you with MF...
At the moment I have a battered Canon 300D to be used behind an OM 50/1.2. The viewfinder is smaller and darker than the body you are using.
So I do expect significant MF problems until I get my paws on the 5D replacement with a matte focusing screen specifically designed for fast lenses.
For now I want to use the 50 as a portrait lens, and to complement my 24/1.4 as a versatile low-light kit. My eyesight is pretty good. I decided to go "alternative" for a christmas present, and have had good experiences growing up with an OM1 and 50/1.8.
The Contax 50s looked nice too, but the extra speed of the Zuiko made the deal....and it's a lot cheaper, smaller and lighter than the Canon 50/1.2.

I expect I will have problems manual focussing on the 300D, but I hope things get better on the full frame next year. in both cases I really want to get a good adapter with focus confirm to at least give me a fighting chance

I have heard good things about the happypagehk adpaters, but he doesn't seem to be selling any right now. No adapters at all



Dec 03, 2007 at 03:45 AM
Stu Warner
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p.1 #4 · OM to EOS focus confirm adapter?


I'm going to have a new lens in a couple of days, and I won't be able to mount it

you know, there's only so many times you can look through a lens from either end and play with the aperture settings without actually mounting it onto a body....

(sigh)


Stu



Dec 03, 2007 at 09:50 AM
htbyron
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p.1 #5 · OM to EOS focus confirm adapter?


I agree with Russell's (pixelpix) assessment. I also have the happypagehk adapter, and I find for whatever reason that the AF-confirmation is not terribly reliable. But the adapter itself is good (solid and well made, so much so that I sold my cameraquest adapter, as I didn't need 2), so I don't blame the maker. Instead, I tend to rely on my focus screen (Haoda Fu on my 20D) whenever possible, and use the AF-confirm as an additional source of information.



Dec 03, 2007 at 11:52 AM
pixelpix
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p.1 #6 · OM to EOS focus confirm adapter?


Hi Stu, Hmmm the 300D's viewfinder will be an issue alright.... I guess you have no option but to go a focus confirm adapter.

Interesting that you mention the canon 50mm.... I have been considering selling my Oly 50/1.2 and heading back to AF. The Oly is no great performer wide open (soft and milky) and the results I have seen from the Canon 50/1.2 have been much, much better at 1.2.

Basically I consider my Oly 50/1.2 an excellent f2 lens. ;-) Now comparing lenses at f2 and I think the Canons are pretty darn good. But my testing of the Canon 1.2/1.4 & 1.8 Plastic Fantastic has led me to the conclusion that the 1.8 Plastic Fantastic is pretty hard to beat, both optically and for value.

For around AUD125 it is an absolute bargain! It's hard for me to justify the extra coin on the 1.2 when the 1.8 produces as sharp (if not sharper) images and bokeh that is almost as smooth. The only thing that is stopping me from grabbing one of these is the plastic mount.

At the moment I am trying to find a Canon 50/1.8 Series I, as this is optically the same as the Series II but has metal mount. If I cant get one, then the Series II will have to do and at the price I will consider the plastic mount a throw away option.



Dec 03, 2007 at 03:13 PM
Stu Warner
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p.1 #7 · OM to EOS focus confirm adapter?


Well, I just bought an AF confirm adapter, shipping out of HK. Fingers crossed!

Thanks for the input Russell:
"The Oly is no great performer wide open (soft and milky) and the results I have seen from the Canon 50/1.2 have been much, much better at 1.2."
I'm not at all suprised. I also think the AF shift focus issues are overblown for real world use (though obviously I haven't actually verrified this belief through physical use). However, for me the cost and size issues are real stumbling blocks. It does seem that the Oly 50/1.2 is significantly better than the Nikon 50/1.2, which was the other option for me given current finances. My biggest dilemma was coughing up double the money over the OM 50/1.4.

"the 1.8 Plastic Fantastic is pretty hard to beat, both optically and for value."
Strongly agree. I reccomended this to a friend, and she has got some very nice portraits with it on her 350D. Even so, it is also soft wide open, and whilst being lightweight is not the fastest lens available. However, the biggest single problem for me is that under the very conditions when I want to use this type of lens, AF on my budget body does not work very well at all, so I always ended up switching to manual focus and struggling with the RIDICCULOUSLY small and fiddly focussing ring on the 50/1.8 II. I get the impression it was added as an afterthought I have also heard people going through several copies of this lens over the space of three years, simply because the all-plastic build is so fragile (you are exactly right with "throw away option"). Hence the large demand for the version 1 metal mount - good luck in finding one at a decent price, if you manage to find one, it could work out great for you.

I'm afraid I have to disagree on the bokeh of the Canon 50/1.8 and 50/1.4. Bokeh is a very personal thing, but I find them both awkward, especially in the double rendering of out of focus highlights of the 1.4. Really, my decision to go for the OM 50/1.2 was based on comparing the OM 50/1.2 to the Canon 50/1.4 and the Nikon 50/1.2. Most people report that the Canon has horrendous flare and halation below f/2, coupled with poor AF in dim light. The OM 50/1.2 has pretty bad vignetting wide open, but this is something that I personally quite like and often add to shots - it's just as easy to correct of course. The Nikon was a distant third, offering nothing over the other two options.

Only time will tell if I have made the right decision or not. I have the Sigma 50 Macro to compare it to, and that sets a very high standard indeed from f/4 onwards.

It seems that most people take years to find the perfect 50. Maybe we should all just start saving and then plug either for the new Leica 50/1.4 ROM or the Canon 50/1.2L.

Personally (again) I am coming to the conclusion that the bokeh a lens is capable of generating is just as important (possibly more so!) than the sharpenss. More specifically, it is the speed of transition between sharp subject and smooth OOF bokeh that attracts me to an image. If a lens is not very sharp and has lowsy bokeh than I find the image too busy and unclear. This is exactly the uncomfortable opinion I have come to regarding the Canon 50/1.4 after looking at many images wide open on various sample sites, and it is this that forced me to look elsewhere in the first place. Also, I noted that even at f/2, the best photos I'd seen from the 50/1.4 were conversions to black and white, in which the halation and flare had been removed to some extent to help reveal the underlying basic resolution of the image (I also noted that black and white resolution chart testers do seem to praise the 50/1.4 more than real-world users, and wondered if this might be the reason).

Anyway, good luck in your search for the 50/1.8 I.



Dec 04, 2007 at 07:08 AM
Ulff
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p.1 #8 · OM to EOS focus confirm adapter?


I have my Olympus 50 1.2 for only two weeks, but in my first tests against the Canon 1.4 on a 5D it is cleary sharper wide open (at least for short and middle distances; haven't tested it at infinity). I'm getting a soft and milky look (that pixelpix refers to) only if the lens isn't accurately focussed, which is frequently the case, although I use an AF confirm adapter (I believe it's due to too much going for- and backwards after focussing and the very short DOF...).


Dec 05, 2007 at 06:51 PM
Ulff
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p.1 #9 · OM to EOS focus confirm adapter?


A quick test, 100% center crop, jpg, unprocessed, Canon 50 1.4 vs. Olympus 50 1.2, both wide open. The Canon is the darker one. Don't know, if these are representative for the Canon; but at least the Oly shows what it is capable of...

http://www.bildar.de/FilesEx/Oly5012Ca5014.JPG



Dec 05, 2007 at 06:58 PM
Stu Warner
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p.1 #10 · OM to EOS focus confirm adapter?


That made comfortable viewing
I've seen other samples from my actual copy of the lens, sent to me by the previous owner, and I have to say that it looks very usable wide open. This is actually more important than I had expected, because only when I opened the box did I realise that the OM 50/1.2 only stops down in full stops. In fact, there is no compromise possible between sharpness and shallow DOF between f/1.2 and f/2, so "usable" sharpness wide open is actually very important. Even so, I have more concerns about focus accuracy than I do about sharpness. The bokeh and subject isolation is also veeery nice indeed at f/1.2, and that is of course the main attraction of the lens.

I hope my adapter will arrive in the next couple of days so that I can try out the lens over the weekend.

Until then Ulff, do you have any more samples to whet my appetite?

best regards,
Stuart



Dec 06, 2007 at 09:53 AM
Ulff
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p.1 #11 · OM to EOS focus confirm adapter?


Stu Warner wrote:
This is actually more important than I had expected, because only when I opened the box did I realise that the OM 50/1.2 only stops down in full stops. In fact, there is no compromise possible between sharpness and shallow DOF between f/1.2 and f/2, so "usable" sharpness wide open is actually very important.


Although the aperture ring has only full stops, you can use all intermediate positions, e.g. between 1.2 and 2.0... .

Has your adapter arrived?



Dec 07, 2007 at 07:39 PM
Stu Warner
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p.1 #12 · OM to EOS focus confirm adapter?


Nope, still no adapter :o((



Dec 08, 2007 at 02:59 PM
jay tieger
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p.1 #13 · OM to EOS focus confirm adapter?


I see on fleabay 2 Oly lenses, one "OM system" one "MC auto-s."..will they both work on the EOS?


Dec 09, 2007 at 08:33 AM
billsnature
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p.1 #14 · OM to EOS focus confirm adapter?


I have a Happypage adapter and the focus feature works fine. I found that I have a lot of vignetting using my Oly 21mm f3.5. I don't know if that is because the adapter is too thin, or just a function of the 21mm Oly.

I have ordered a Fotodiox pro adapter, and will see if it eliminates the vignetting, but does so at the cost of the AF confirmation feature.

If it ever stops raining here, I will test outdoors and post the answer.

Bill



Dec 16, 2007 at 12:53 PM
billsnature
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p.1 #15 · OM to EOS focus confirm adapter?


Hi all,

I have no real easy way to post pictures so you will need to take my word for it. But it does look like I get less vignetting with the Fotodiox pro adapter than with the Happypage.

The weather is horrible and variable so I would like to try this again on a sunny day, but it does look better with the new adapter.

Will confirm later in week



Dec 16, 2007 at 02:46 PM





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