M11 and LEICA Elmar-M 50/2,8 11823

[Rva]

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33 minutes ago, lct said:

So you focused at f/2.8 and did not change focusing at other apertures, right?

yes, also I had to magnify (manually) to see if it is in focus

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[lct]

22 minutes ago, Rva said:

yes, also I had to magnify (manually) to see if it is in focus

You mean you focused at f/2.8 with the EVF et you did not refocus anymore? Sorry to ask those questions but focus shift can be at play here.

[lct]

33 minutes ago, Rva said:

To start focusing, I have to extend the tube. Then rotating the focus ring, the tube automatically collapses or extends. The aperture ring is evident. But the front ring?

Whilst you have extended the tube you have to lock it first by rotating it to the right. The front ring is made for that. It is only after that locking process that you will start focusing, right?

[Rva]

51 minutes ago, lct said:

Whilst you have extended the tube you have to lock it first by rotating it to the right. The front ring is made for that. It is only after that locking process that you will start focusing, right?

Bingo. I didn't know that. Perhaps the lens was not locked when I started focusing. Nevertheless, the images I took by this Elmar-M were pretty sharp, sharper than Cron 50. But it might be possible that Cron can suffer from a focus shift. 

I just played a bit with Elmar-M and you can lock the tube in two positions, one position when the aperture scale is on the top and the second position with the scale is down. This was confusing to me. is it normal, or it shouldn't happen?

 

>>> You mean you focused at f/2.8 with the EVF et you did not refocus anymore?

No, I did not refocus, with focus peaking, the camera outlined high-contrast edges of the books, so no need to refocus. 

 

[lct]

The Elmar is a sharp lens at f/2.8 in the centre of the frame, less so at edges and corners, whereas the Summicron is sharper there. At about f/4-5.6, the Summicron is bit softer due to focus shift but this is only significant on 2D subjects, which could explain your findings. I would not generalize the results of tests made on closeups though as they are not necessarily representative of what lenses can do on real-world tests. 

[Rva]

6 minutes ago, lct said:

The Elmar is a sharp lens at f/2.8 in the centre of the frame, less so at edges and corners, whereas the Summicron is sharper there. At about f/4-5.6, the Summicron is bit softer due to focus shift but this is only significant on 2D subjects, which could explain your findings. I would not generalize the results of tests made on closeups though as they are not necessarily representative of what lenses can do on real-world tests. 

Of course, sharpness is not what defines a good photo 🙂 

 @lct thanks for the information on Elmar-M

[jdlaing]

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3 hours ago, Rva said:

Of course, sharpness is not what defines a good photo 🙂 

 @lct thanks for the information on Elmar-M

Holy Jeez you keep talking like that these neophytes will run you right out of here. 😃