Are Z lenses APO lenses?

Started 6 months ago | Discussions thread
Z6User
Z6User Senior Member • Posts: 1,215
Re: Are Z lenses APO lenses?

davethebirder wrote:

Z6User wrote:

as1mov wrote:

Hi,

are the Z lenses APO lenses in Leica's sense?

Thanks.

If you allow for lens corrections in camera, then many do match so called APO designs in terms of aberration corrections. However, Nikon does not (yet) use the APO designation. For example, the 105mm lens is extremely well corrected, significantly more so than previous Nikon 105mm designs.

I can't speak for other S lenses but the neither the 50 F1.8S or the 85 F1.8S are APO designs and show a normal amount of longitudinal chromatic aberrations .......ie red/purple fringing in front of the focal plane and green behind ......

......... which normally is difficult to correct in camera or in post ..... (see under bokeh fringing)

https://www.opticallimits.com/nikon_ff/1109-nikkorz5018s?start=1

https://www.opticallimits.com/nikon_ff/1118-nikkorz8518s?start=1

I believe the 58mm F0.95 lens is very highly corrected, as are the long telephoto primes.

No-one would claim that the 24-70mm F4 lens is apochromatic, however in use I have found it to have no obvious colour fringing in out of focus areas. That is a big plus for me. I should note that my observations are based on usage rather than formal tests, so OOF CA might be an issue for use cases I have not tried. One aspect I did not like about my F mount primes was obvious OOF CA which could easily be seen in small prints.

I am surprised the 50mm and 85mm F1.8 S lenses are not improved in this respect (I have no personal experience with them).

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