Canon Officially Announces 4 new RF Lenses
- Thread starter Richard CN
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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? - Products & Innovation | Nikon USA
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.
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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.
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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.
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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:
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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.
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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.
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I was disappointed to discover this when I got my R6, as I don't have a computer.
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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.
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Finally received my RF 50mm f1.4L VCM today. Will spend a couple of days comparing it to the RF 50mm f1.2L and the RF 50mm f1.8 in real world shooting (not charts or MTF).
It’s longer than I thought but much lighter than the f1.2L lens and balances well on the R5 & R6 MKII.
Its build quality is very high but then that’s what you expect with a Canon L lens.
It’s longer than I thought but much lighter than the f1.2L lens and balances well on the R5 & R6 MKII.
Its build quality is very high but then that’s what you expect with a Canon L lens.
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The harder nut to crack for Canon will be the 85mm. The EF 85mm f1.4L IS USM is used by many wedding photographers and portrait photographers as a lighter weight alternative to the f1.2L lenses.
It’s the only EF lens I still own, it’s very sharp in the centre on the R5 (as it was on the EOS 5Ds before it), has that IS (four stops) and acceptably sharp out to the corners. It does suffer from abberations albeit correctable. With the RF / EF adaptor it becomes forward heavy but otherwise performs flawlessly and focuses quickly and accurately.
So Canon has a challenge with for me the “must have” addition to the RF 1.4L VCM lenses. I wonder if this lens will appear in 2025?
It’s the only EF lens I still own, it’s very sharp in the centre on the R5 (as it was on the EOS 5Ds before it), has that IS (four stops) and acceptably sharp out to the corners. It does suffer from abberations albeit correctable. With the RF / EF adaptor it becomes forward heavy but otherwise performs flawlessly and focuses quickly and accurately.
So Canon has a challenge with for me the “must have” addition to the RF 1.4L VCM lenses. I wonder if this lens will appear in 2025?
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After a week of use, the RF50 f/1.4L VCM is performing as expected! The one thing I have trouble getting used to is the noticeable clunk when the VCM powers down. I have the camera resting on the hood next to my laptop this morning when the idle power off kicked in after a few minutes and I both heard and felt the VCM drop down due to gravity. I know that it's normal designed to do that, but it's the only lens I have that does it 
It does have noticeable CA, especially with backlit subjects at f/1.4, but not a distracting amount. And not related to this lens specifically, but I now understand what people are saying about the R5II IBIS being very jerky in some situations, the image moves like it's bumping down a flight of stairs when you're panning. When you hold the camera relatively still, the IBIS works as expected.
In another thread I said my house was too small for 85mm, it turns out that my kitchen is too small for 50mm as well I wouldn't tell anyone I'd won the lottery, but a 35VCM appearing would be a sign!
It does have noticeable CA, especially with backlit subjects at f/1.4, but not a distracting amount. And not related to this lens specifically, but I now understand what people are saying about the R5II IBIS being very jerky in some situations, the image moves like it's bumping down a flight of stairs when you're panning. When you hold the camera relatively still, the IBIS works as expected.
In another thread I said my house was too small for 85mm, it turns out that my kitchen is too small for 50mm as well
I wouldn't tell anyone I'd won the lottery, but a 35VCM appearing would be a sign!
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A little off topic: Do you ever wonder whether or not we'll one day wake up and find the f/1.2 lenses discontinued? Supplanted by the f/1.4 lenses?After a week of use, the RF50 f/1.4L VCM is performing as expected! The one thing I have trouble getting used to is the noticeable clunk when the VCM powers down. I have the camera resting on the hood next to my laptop this morning when the idle power off kicked in after a few minutes and I both heard and felt the VCM drop down due to gravity. I know that it's normal designed to do that, but it's the only lens I have that does it
It does have noticeable CA, especially with backlit subjects at f/1.4, but not a distracting amount. And not related to this lens specifically, but I now understand what people are saying about the R5II IBIS being very jerky in some situations, the image moves like it's bumping down a flight of stairs when you're panning. When you hold the camera relatively still, the IBIS works as expected.
In another thread I said my house was too small for 85mm, it turns out that my kitchen is too small for 50mm as well
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I think they might be like the EF180L, no updates, but small production runs every few years.
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