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XCD MTF Charts Compared

  
 
MichaelErlewine
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p.1 #1 · XCD MTF Charts Compared


I find this MTF Chart helpful.







Jan 01, 2026 at 10:07 AM
geoffreyg
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p.1 #2 · XCD MTF Charts Compared


(removed)



Edited on Jan 01, 2026 at 05:44 PM · View previous versions



Jan 01, 2026 at 11:16 AM
nazdravanul
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p.1 #3 · XCD MTF Charts Compared


MichaelErlewine wrote:
I find this MTF Chart helpful.


We had this conversation on another forum. Since this is poor poor quality AI generated content, full of false assesments that are not supported by the claimed underlying data, you should remove it also from here.
People on this thread, beware - the initial post was AI generated, it’s not an MTF chart, as stated initially, it’s meant as a summary based on MTF data, but if you look at the actual MTFs, you’ll find a completely different story (and to “add insult to the injury” even a lot of the links result in a “page not found” message).



Jan 01, 2026 at 05:39 PM
flash
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p.1 #4 · XCD MTF Charts Compared


Unfortunately, this evaluation doesn't come close to being what I have experienced with my full set of XCD lenses.

Gordon



Jan 01, 2026 at 06:48 PM
KLaban
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p.1 #5 · XCD MTF Charts Compared


The "chart" uses such subjective terms, as a measure it is unhelpful.


Jan 02, 2026 at 04:55 AM
 


Search in Used Dept. 

MichaelErlewine
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p.1 #6 · XCD MTF Charts Compared


flash wrote:
Unfortunately, this evaluation doesn't come close to being what I have experienced with my full set of XCD lenses.

Gordon


I would love your comments on these. I am working on them, but it takes time, as you know.

I did re-get the XCD 55mm f/2.5 and am testing it out. Not perfect, but handy and good enough for much of what I do.



Jan 02, 2026 at 06:50 AM
RustyBug
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p.1 #7 · XCD MTF Charts Compared


KLaban wrote:
The "chart" uses such subjective terms, as a measure it is unhelpful.


Harkens back to the photo rag days ... the magazines used similar terminology to group attributes.

The terminology was rooted in objective data reference criteria, but of course wasn't the same as an MTF, just an easy / summary comp read.



Jan 02, 2026 at 09:23 AM
nazdravanul
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p.1 #8 · XCD MTF Charts Compared


RustyBug wrote:
Harkens back to the photo rag days ... the magazines used similar terminology to group attributes.

The terminology was rooted in objective data reference criteria, but of course wasn't the same as an MTF, just an easy / summary comp read.


The problem is that the “easy summary” made by AI in the initial post is simply (and visibly, once you actually spend time with those original MTF graphs + lenses) wrong in relation to the underlying data/ MTF charts it claims to “summarize”.



Jan 02, 2026 at 11:05 AM
RustyBug
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p.1 #9 · XCD MTF Charts Compared


nazdravanul wrote:
The problem is that the “easy summary” made by AI in the initial post is simply (and visibly, once you actually spend time with those original MTF graphs + lenses) wrong in relation to the underlying data/ MTF charts it claims to “summarize”.


I wasn't speaking to the accuracy / validity of the chart as presented ... just the remembrance of days gone by.



Jan 02, 2026 at 11:16 AM







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