Having troubles with Summilux-M 50mm ASPH

[usm]

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Hi!

 

I was sending my Leica M (240) together with my Summicron-M 35mm ASPH and the Summilux-M 50mm ASPH to CS for adjusting the focus.

The rangefinder was not aligned when the Summilux-M 50mm ASPH was set to endless.

It came back, the focus for endless was correct but the focus by 0,8 meter was 5mm to far away.

So I sent it back again with the result that the focus at 0,8 is correct but the focus at endless is wrong again.

 

For example:

first row, from left to right: Aperture 8 focus endless, Aperture 4 focus endless, Aperture 2,8 focus endless 

second row, from left to right: Aperture 2 focus endless, Aperture 1.4 focus endless, Aperture 1.4 focus on the lightning rod 

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My question is: Why is it not sharp?

Thanks !!

[usm]

Nobody is using a Summilux ASPH 50mm on a Leica M?

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[lct]

 Why did you focus at infinity and not on the clock if i may ask? Focusing at infinity is not necessarily a good idea if your subject matter is not very far.

[pico]

....

 

Never mind. Post is another irrelevant pixel-peeping thing.

.

 

Edited March 26, 2018 by pico

[Rus]

https://www.l-camera-forum.com/topic/118043-m9-coincidence-at-infinity/?p=1292446

 

Read up on Julian's very useful posts and you will have a better understanding of how RF coupling works as well as how different misalignments manifest themselves. 

[usm]

Why did you focus at infinity and not on the clock if i may ask? Focusing at infinity is not necessarily a good idea if your subject matter is not very far.

Well, The clock is about 300 m away, I had to focus at infinity. The problem is that I can’t reach infinity.

[lct]

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Do you have the same problem when using the EVF?

[usm]

Yes it's the same. I can see it in the EVF (Olympus) that is out of focus.

I also did a test today with much more distance, around a km  or more, cross a little valley, it is much more out of focus when the object further away.

 

Is it the lens or the rangefinder?

[lct]

You mean when you focus on the subject matter with the EVF? If so, i would believe the lens is the culprit since the EVF is not linked to the rangefinder. Is your 35/2 asph accurate at infinity?

[usm]

First row = 35/2

Second row = 50/1.4

left column = f 8

right column = f 2/1.4

 

The 35/2 seems to be ok. With the EVF I can see the "redlines" moving until infinity.

 

With the 50/1.4 it is not possible to see the "redlines" moving until infinity. They disappear after 80-100 meter.

All when wide open.

 

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Thanks for help.

[wizard]

Your Summilux 50 seems to be ill-adjusted, as it does not appear to reach the full infinity position. I do not understand, however, why you did send the lens back the second time (as it seemed to be correctly adjusted for infinity after returning from the first trip to CS). I do not care whether the 0.8m marking actually corresponds to a measured distance of 80 cm, as long as the image I obtain when using the camera's rangefinder for focusing is sharp. 

 

Have your lens correctly adjusted to infinity, the rest should be ok then.

 

Cheers, Andy

[usm]

I sent it back because it was not possible to focus correctly:

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Infinity was ok.

[M11 for me]

Ich habe jetzt eben mit meinem Objektiv 2 Bilder auf unendlich und ganz nah bei f/1.4 gemacht. Bei ganz nah habe ich mit dem Sucher fokussiert, wobei ich mit der Kamera am Auge vor und zurück ging bis das Bild im Sucher scharf war. Beim Fernbild habe ich auf unendlich gestellt bei etwa 300m. Belichtungszeit war 1/4000s und etwas überbelichtet.

 

Resultat: Beide Bilder waren im Lightroom (DNG) ganz scharf. Bei dir besteht wohl doch ein Problem.

[jmahto]

Yes it's the same. I can see it in the EVF (Olympus) that is out of focus.

I also did a test today with much more distance, around a km  or more, cross a little valley, it is much more out of focus when the object further away.

 

Is it the lens or the rangefinder?

Not sure I understand Olympus EVF comment. The best way is to test focus is to use LV on M240 EVF (or rear LCD) using max zoom. In your first picture, it is possible that f/2.8 (top right pic) need to be focused closer for the tower clock. Only LV can answer that.

[usm]

Not sure I understand Olympus EVF comment. The best way is to test focus is to use LV on M240 EVF (or rear LCD) using max zoom. In your first picture, it is possible that f/2.8 (top right pic) need to be focused closer for the tower clock. Only LV can answer that.

Let me explain:

Everything beyond more or less 80m is out of focus when the focus ring is set to infinity. It is impossible to turn the ring further.

When checking the rear LCD or the (Olympus) EVF I can see that everything beyond 80m is not sharp. Also the red lines, when turning the focus ring, they disappear beyond 80m.

 

About the top right pic: it is focused to infinity, no way to come closer to the tower clock.

 

Can some one post an image with the same settings: Summilux 50mm: infinity f 1.4, infinity f 2.8, infinity f 8 and maybe something closer around 1m with f 1.4?

 

Thanks

[wizard]

...

 

Can some one post an image with the same settings: Summilux 50mm: infinity f 1.4, infinity f 2.8, infinity f 8 and maybe something closer around 1m with f 1.4?

 

...

 

Well, those images would only show how a correctly adjusted lens behaves. There is no question that regardless of the aperture used your image should be sharp at infinity if the lens is set to infinity. Your lens right now seems to stop short of the full infinity position, resulting in a blurred image when using e.g. full aperture (at smaller apertures, increasing depth of field masks this).

 

Further, there is also no question that your lens should not backfocus or frontfocus at smaller distances. Unfortunately, while I do own a Summilux 50 asph., I do not own any digital M camera, and so am unable to post any comparison shots.

 

Cheers, Andy

[M11 for me]

Sorry, I wrote in the wrong language:

 

I just shot 2 pictures with my lens. One at infinite and the second one very near both at 1.4. The picture with the near subject I focused through the finder by moving backwards and foreward in order the get the subject sharp. The second picture with the subject far away I set the lens to infinite with a subject distance at about 300m. The exposure time was 1/4000 and a bit overexposed.

 

The result: Both pictures sharp at 100% in lightroom. Both DNGs.

[lct]

Your lens has a problem as explained by wizard above. Time for Leica to do the job properly.

[usm]

The CS wants my gear back again - M + 35/2 + 50/1.4 - lets see ...

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Hallo,

Look here: Leica M

[jmahto]

Let me explain:

Everything beyond more or less 80m is out of focus when the focus ring is set to infinity. It is impossible to turn the ring further.

When checking the rear LCD or the (Olympus) EVF I can see that everything beyond 80m is not sharp. Also the red lines, when turning the focus ring, they disappear beyond 80m.

 

About the top right pic: it is focused to infinity, no way to come closer to the tower clock.

 

Can some one post an image with the same settings: Summilux 50mm: infinity f 1.4, infinity f 2.8, infinity f 8 and maybe something closer around 1m with f 1.4?

 

Thanks

Now I understand that you were using Olympus EVF on M240! (I thought you were using Olympus camera's EVF. My bad). Yes, your lens need to go back for adjustment.