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M9, 50Lux ASPH 100% crops


pack_tor

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Hi Guys,

 

I recently sent off my M9/50 Lux ASPH to Leica for RF Calibration & CLA. It's back, but I do not have a reference to judge the performance of my 50 Lux.

 

Could you guys please post a few 100% crops of the 50 Lux images (without any extra sharpening)?

 

I have to use an amount of 50 in Lightroom to get tack sharp images @ 1.4. I'm fine doing it, but since it's supposed to be the sharpest lens available, I am wondering if i even have to do it. I'm also trying to identify it the lens is within tolerances so I can send it back to Leica if I don't believe it is.

 

Thanks!

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Sharpening in Lightroom is not the same as lens sharpness. It just boosts edge contrast., so that is not a way of judging the lens, I fear. If you want to test the focus accuracy, there are a number of methods, the most popular being a tape measure at 45 degrees. Personally I find the best way is just to look at my images and see if the maximum sharpness is where I think I put it.

Anyway, comparing to shots by other users in other places is not going to tell you much. It would be best, if you compare lenses with another lens on the same camera and a tripod.

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Thanks for the response. Maybe I should put it a different way.

 

What I am trying to understand is the standard for this lens on M9. I have no reference point right now. The images on the web are either sharpened or not at 100% crop.

 

I do think the lens focuses fine after I got it back, but I'm wondering if the sharpness (right out of the camera) is within the tolerances allowed for this lens.

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The only way to tell for sure would be to have Leica test it on their test equipment. But if you would put a correctly focussed, tripod mounted shot on the forum, and the crop, users that have the lens could judge whether they find it acceptable.

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50Lux ASPH, f1.4, 1/750sec, ISO 360, M8, C1-5, sharpening disabled, Clarity 0, 100% crop.

As you can see, the real point of focus is about 2-3 inches behind the eye where the hair between eye and ear is sharpest. Maybe the lens could do better on an M9, on a tripod, and with better focusing. Also the crop does look better in C1 before processing for the web. However, the lens can at least do this well.

 

Michael

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And a crop @ 1.4:

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That was the full image; here it is:

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C1, 50 Lux ASPH, M9, default sharpening (very light)...

 

F 1.4, off-center; 2 meters distance; 100% crop.

 

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IMO that is one seriously sharp lens at f1.4. I'd only use it on people younger than 35, mostly :)

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Thanks a lot! You guys are extremely helpful!

 

Here's an example of what I'm getting. I'm thinking of sending back to Leica again.

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....and another example:

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It would be interesting to see the raw files, but from what I can tell from the crops it sure looks like you're attaining solid focus to me... and that focus looks pretty sharp for 1.4, too! Don't forget you've got low-contrast subjects in both shots too, so you're not going to see as much detail as there might really be there if you raised the contrast.

 

You could also just be running out of resolution here for the "wow" factor :) But the RAW will tell the tale.

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Yes, from the shots there is definitely something not right with the lens. Apart from the sharpness there is also the "bokeh" that is sort of washed-out. It is as if you have humidity inside or even have a soft "haze" filter on the lens.

 

As the others suggest try shooting in direct sunlight and not in shadows to see how it behaves. As you can see the other examples are "brutal", for a lack of a better word.

 

I had a similar problem with my LUX 50 and it had to be replaced. Like you I was a bit skeptical at first and just found highly unlikely that there was something wrong with the lens. These things happen, not often, but they happen.

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Thanks guys! I'll try a few pictures out in the sun - unfortunately not a sunny day out here to try it. I'd rather not shoot against the test charts - I'm just trying to get the optimal real life performance.

 

DFV - The exact think occurred to me when I took these pictures. The Bokeh doesn't seem right. There seems to be some kind of smearing/painterly effect going on and that's what made me wonder if the lens is behaving within tolerances.

 

Jamie - I'll send you a couple of RAW files. Thanks for offering to take a look.

 

I've also send these pictures over to Leica. I may have to send the lens back again. :(

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Shouldn't a test for sharpness use a stationary object as the subject? Any movement in the subject combined with slow shutter would result in an image that is less sharp than expected.

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lct you focused well there. That is a completely unsupported comment to make about the M9 though. This is the Macro 90 which is softer than the 50 but a pretty fair illustration of resolved detail...

It was not a comment but a question supported by the 100% crops of this thread which all look more or less soft to me. I don't know why hence my question. BTW your macro pic looks good at first glance but it is not a 100% crop is it?

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