Reference: The lenses tested were the 50mm0.95 Asph #4085786, from Nov ’09 delivery and a 50mm1.0 Noctilux-M #3738627, which has been 6-Bit updated by Leica. All images were made with a tripod and self timer delayed activation. Critical focus was insured by the use of the 1.4x magnifier. The RAW files were converted to TIFF in Photoshop using “As Shot” white balance and “Default” settings.
For the first set of images, the point of focus was the highlight on the wire corner. Both lenses were tested at minimum focus distance of 40″ and at maximum aperture. The 50mm0.95 Asph is shown on the left and the 50mm1.0 is shown on the right.
The above images are shown at 100%. The 0.95 Asph is clearly sharper with better contrast. Upon secondary inspection of the images, I thought the the 50mm1.0 may have been slightly back focused. This was exceptionally perplexing as I was extremely careful focusing. Returning to the full screen images, you can note that the debris on the glass table is in the same plane of focus on both images, so I am concluding that this is simply a difference in how the two lenses resolve focus and also the difference between f0.95 and f1.0. If the comparison is as accurate as I believe it is, this is much more of a difference than I expected to see. Photographing with these lenses at maximum aperture and minimum focus distance definitely accentuates the subtle differences in the two lenses.
The next set of photos were made at infinity focus at f8.0 with lens detection enabled. I wanted to see what these looked like if you wanted to use it under more normal conditions. There is a slight difference in the auto metering as the 50mm0.95 image has more sky, but otherwise they look pretty similar.
Upon close inspection, you can see that there is a bit more contrast in the 50mm0.95.
This was a test to see how each lens compared with 6-Bit (Lens Detection) turned on and turned off. The first set is the 50mm0.95 Asph and the second set is the 50mm1.0. Both were taken at /250th sec at f8.0
As you can see, the 50mm0.95 has subtle vignetting, but the 50mm1.0 is much more pronounced. In some occasions, the vignetting is nice for black and white images and it would not at all be noticed if you were using this on an M8. In any case, if you have an earlier Noctilux that is not 6-Bit, I would have it converted. Leica also changes the lens mount which insures that it focuses properly on the digital M cameras.
The next test was to see if there was any perceivable depth of field or sharpness difference on the 50mm0.95 Asph lens from f0.95 to f1.0.
Here are images from the 50mm0.95 and the 50mm1.0, both are at maximum aperture.
Here are two more sets, comparing both lenses at f1.0 and f1.4.
Conclusion: To my eye, the new 50mm0.95 Asph retains the traditional Noctilux look, while having a slight increase in contrast and color saturation. The lens has substantially less vignetting and renders fine details more sharply at open apertures. Another nice feature of the new lens, which was not previously mentioned, is that the Asph has a shorter focus throw, so is it quicker to focus. The lens does seem to have better focusing accuracy, wide open, at minimum focus distance. While either lens would make a fine addition to any M system, the new lens is clearly an improvement. At $9995.00, the 50mm0.95 is definitely an investment, but certainly one which will be enjoyed!
President, Camera West
P.S. A few non test environment snapshots…