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Focusing problems with Summarit 90


jtorrents

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A few weeks ago, my M8 returned from Solms after changing the shutter. The camera works fine, and I've tested all my lenses and all focus ok. However, I did no check my less used, a Summarit 90. The lens used to be spot on. But now, focus is totally out. If I try to align the split image in the viewfinder, the photo came out of focus. Let's says that if I am focusing about 1 meter, and the split image aligns perfectly, the lens barrel indicates that 3 meters is focused. This leads to a totally out of focus photo.

If I put the lens on another body (M6) it works ok, so I've concluded that some kind of bad adjustment is on the M8 body. I cannot understand how it can be spot on with all the lenses and not with the 90...

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Focusing at infinity results with the same error. It seems that the Focusing mechanism is not coherent with the lens. However, and this What I can't understand, the lens is fine on another body. And the rest of my lenses are spot on, both on close focus and infinity.

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This is indeed a lot strange.... more than all, the fact that other lenses do focus right on the M8... which are the other focals that are ok ? Is there some other "long" lens between them (say, a 75 to 135) ?

The Summarit 90 has indeed a very short rotation of the barrel in focusing action (less than any other 90) and it could be mis-coupled with RF roller cam but I'd expect this would emerge on yor M6 too.... :confused:

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The other lenses, wich are all fine, are Tri-elmar wate, elmarit 28 asph, summicron 35 and Summilux 50 preasph. The strange part is that the lens works Ok on the M6...but not on the M8. Camera was serviced a few weeks ago, but until Now I didn't test the Summarit 90. I've writen to Customer Support detailing the problem, so I hope an answer shortly...

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Just a curios, not pretending to solve this little mistery... have you tested the focus of the Summilux 50 on the M6 too ? I mean, not PRECISE focus (with lens wide open, for instance) but simple right correspondence real distance - lens indication... you say :

 

1) Summarit 90 on M8 : subject 1 meter (RF aligns) - 3 meters on lens barrel

2) Ditto on M6 : subject 1 meter (RF aligns) - 1 meter on lens barrel

3) Summilux 50 on M8 : subject 1 meter (RF aligns) - 1 meter on focus barrel

4) Ditto on M6....

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Luigi,

Thanks for the tip. Since yesterday I'm in a holiday trip, and the 50 is at home...but I hope to visit a Leica Store this week, so I could test some other long lenses (75 or 90) on the M8.

Regards,

Joaquin

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I've just tested at the store a 75 summicron and a 75 Summarit and it appears the focus error again, resulting imposible to focus trough the viewfinder. Another 50 summilux asph focus fine, so it must be some Kind if bad adjustment on the body...

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Thanks, but I cannot understand completely why it is needed to send all the lenses...it is not posible to adjust the body to a certain standard so it would work with all the range of lenses?

It's not working Ok for long lenses (75 and up)...excuse my ignorance but I cannot understand it.

Regards,

Joaquin

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Problem is we are not sure that the body is the culprit, or the only culprit so far. It is of course possible to send in the body alone but there is a risk that Leica don't find anything to fix in it or that they adjust the body and its new settings won't fit some of your lenses any more. You can take your chance though.

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Joaquin--

I would say to send just the body, because that's where I think the problem lies.

 

If the body is out of tolerances, Leica will fix it and return it, and won't need your lenses. If the body is fine, Leica will ask you to send the lenses.

 

The problem you describe is peculiar. The rangefinder cam in all lenses works more or less the same way, so the focal length of the lens should make no difference. Therefore, lct suggests that since we don't know where the problem lies, it might be simpler and quicker to send all the lenses in with the body.

 

You are indeed correct, the body can and will be adjusted to a standard such that it will work with all lenses. I'm thinking that since you just got the body back from service not focusing properly with all lenses, the problem is likely in the body. But neither lct nor I are sure about that, and that's why he suggests sending the whole kit and caboodle.

 

For me, the hassle of sending everything at once might be too much, but as lct says, you have your choice. ;)

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Luigi, Ict and ho_co:

Thanks for the useful advices. Will talk to Customer Support and i will send whatever they need to adjust the camera. By the way, and while I was at the store couldn't resist and bought a 35 summilux new version! Who said there were long waiting time! :-) happily, the 35 summilux focus perfect: What an incredible lens!

Regards,

Joaquin

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