Canon Officially Announces 4 new RF Lenses
- Thread starter Richard CR
- Start date
You have given a link to Nikon MTF charts so no wonder you have problems. Canon has the relevant information on Canon MTF charts. Try googling how to interpret Canon MTF charts and you will find what you want.Sagital was the word I was lookng for.
What is a Lens MTF Chart & How Do I Read It?
An MTF chart is a measurement used to evaluate the performance of a lens. This article teaches you how to read it.www.nikonusa.com
Without a legend of what each MTF graph shows, it isn't straight forward to compare them.
https://support.usa.canon.com/kb/s/article/ART152319#:~:text=MTF charts display the lens,is about 21.5mm away.
Upvote
0
That's part of the answer, thank you. The part that's missing is the mapping of "F/8" and "F/max" to colors and so forth. It's an explanation but not a legend. To be able to meaningful comparisons between MTF graphs you need the legends included. Or why do some MTF graphs have more lines than others? That link above doesn't say.
Upvote
0
And you were needlessly rude, but hey, that's nothing new for you, is it? I was beginning to think you'd turned a new page but obviously not.
But that's only 4 lines, some Canon graphs have 8. We're getting closed to having a full understanding of MTF graph values, it is a shame vendors make it so difficult.
Upvote
0
Just type “Canon MTF charts“ into the search bar of your favorite search engine. One of the first few links will be to a canon site that explains all of this. Maybe that’s too challenging, and I had the page open anyway.
Regarding the number of lines, one of the things you might read in that site states:
Upvote
0
The one thing, the only thing my RF 50/1.8 doesn't do better than my EF 50/1.5 is the smoothness of the bokeh. Granted, part of the smoothness is possibly just poor resolution at wide apertures, but the 1.4 had that advantage.
That said, I should probably let it go. I have the 50/1.2L in EF format, and while it's not nearly as stellar as the RF 1.2 lens, it also have a very smooth rendering for portraiture. And it focuses very well on the R bodies, no more focus shift.
Upvote
0
I cannot understand "no more focus shift" for the EF 50mm 1.2L. This is a lens property not a focusing error. Since the lens focuses fully open even on R bodies it will have focus shift when stopped down. I understand that now you do not have to AF microadjust but that's all. Please explain.
Upvote
0
Curious, do you pros not depreciate the lens over 7 years or something?
Also, personally, I look at the purchase price MINUS the sale price as the true cost. I try to buy stuff mint-used and don't price stuff so that it sells fast, instead try to get a good price (though I'm also realistic). If you get a $12k lens used for $8k and sell it for $6k just before it's replaced a second time, then the lens doesn't cost $12k, instead it costs $250/year or something.
Upvote
0
Similar threads
