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MTFs for Canon R 100-500mm, 600 f/11 and 800 f/11

Alan, thanks for pointing me to optyczne.pl--interesting stuff there. I'd be careful comparing the two graphs you posted though, because they used different lenses.

If you look at Bryan Carnathan's cross-test, he used the same lens: Canon EF 200mm f/2L IS USM Lens Image Quality

Another possibility would be to get a 90D instead of the RF800 (a refurb is cheaper now). Then I could shoot with just the 1.4x, which would give 2x shutter speed at ISO100 with about the same MP. But from their test, it looks like the AA filter would eat up most of the extra resolution, even though it only works in one direction.
The data at f/8 and greater should be independent of lens as most good lenses have negligible aberration there and it's diffraction that is limiting. The R5 is still outresolving the 5DSR at these narrower apertures. I don't put much store by the TDP's charts, they are the weakest point of one of the best websites, if not the very best.

The 90D does not realise the full potential of its 32 Mpx sensor. And, you would have to use low isos. I found at the high isos I shoot at, usually 640 to much more, I wasn't getting better resolution than a 20 Mpx crop without an AA-filter (D500). I just checked on https://www.optyczne.pl/433.4-Test_aparatu-Canon_EOS_90D_Rozdzielczość.html and indeed they find the D7500, another 20 Mpx sensor without the AA-filter, is just as sharp! optyczne.pl is a hidden gem of a website. I read it using chrome browser to translate automatically.
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Canon launches an 'Edit Van'

Canon India launched an 'edit van' yesterday in India. It is quite a cool van. And let this be a wake-up call to people who think that India is not important to Canon. Canon guy said this is the first of it's kind and they chose to launch it in India for the volume of work India does. Here are some links I made for you all to see. It was fun. I was the first one in.. :cool:
I have added my photo, just for fun... LOL

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New Canon 600mm f/4 Design Uses Spotting Scope Trick

I'm, over 60 and hand hold the 600 f/4... lol
I find my CF varizoom crows foot mono pod to be a net strength/maneuverability advantage. Either shooting from simgle or slow walk locations taking all the load off is darn handy. The friction settings on all the moving parts keep the swings under control when this birds come blasting past.

Took awhile to learn how to dance with it, I am no Fred Astair (sp?)

I dont use it as a still tripod or leave it un handed for more than a few seconds, once balanced the effort to keep it aligned/standing is minimal
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Patent: Canon RF 20mm f/1.8L and RF 24mm f/1.8L

Fast, Wide AND small & light? Yes please.
I would contend that 3 of the 4 is good enough for me (remove the fast). If you want fast as well the only possible way would be with heavy software correction or a curved sensor so optics become easier to design.

It would be great if Canon is able to put out some lenses like Laowa, but with AF as those lenses check every box except the AF.
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Industry News: Nikon plans to have 50+ Z-mount lenses by 2025

Here's a repost of post I did about a year ago, but it makes sense once again:

I just don’t get why people still compare the RF 100-500mm to Sonys 200-600mm lense. Those lenses feature completely different designs for different purposes.

RF 100-500mm - 200-600mm
77mm Filter - 96mm filter thread
20 cm - 32 cm
1.45 kg - 2.1 kg
0,5 m - 2,4 m Minimum focus

If you look at the purposes intended, it is even clearer:
  • RF: possible walk-around lense
  • Sony: most „sit and wait“ lense… (birders e.g.)

  • RF: landscapes, sports, wildlife (77mm thread allows regular filters…)
  • Sony: almost exclusively wild-life
The narrower end and the exceptional minimum focus makes the RF 100-500mm a great sport lense for example for soccer, handball (huge in Germany) while the 200-600mm isn’t suitable here.

In addition, the RF 100-500mm is an L lense, the 200-600mm is not a G Master lense, a fact which a lot of users complained on the sonyalpharumors site when the lense was released. Since the 200-600mm features weather sealing and still is not a GMaster lense, it likely says that the image quality is not the best possible. (while it is still good IQ)

The Sony 200-600mm is a great option for wildlife photography. And yes, it is an offering Canon does not have. But Canon has a different, much more versatile and way more handy option. Comparing those lense just doesn’t make sense.

I don´t wanna trash the Sony 200-600mm lense here, because it great lense for what it is. But I’m sick and tired of people bitching and moaning about the fact, that the 200-600mm is one third of stop faster between 472-500mm and people literally comparing apples and melons. Furthermore, they only compare a single tiny fact…
Wow, what a response. I just don't think the 100-500 was a big improvement of a lens over my 100-400 II. 200-600 at least gives me some additional reach at a reasonable price point, which was my point.....but wow, what a reply.
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Canon will announce the RF 16mm f/2.8 and RF 100-400mm next

That's not what happened. The Ra and the R6 both came out after the RP. It's common for Canon to add functionality to newer cameras that they don't go back and add to older cameras. For example, your EOS RP has focus bracketing. The EOS R does not, even though it is a more expensive camera it came out before the feature was introduced. The Ra (as stated, a newer camera than the RP) has focus bracketing, too, as do the even more recent R5, R6 and R3.

This is not correct. While that point may be valid in general, that's not the case with this feature. As gruhl28 noted, the feature is present on the R which was the first camera released. This is a screengrab of the R's menu for the quick dial showing the ISO option, this is the option that is missing on the RP. The reality is that the RP, as the lowest end camera is simply forced to accept the blows of the Canon cripple hammer even when they fall in arbitrary and strange ways. Still, can't really fault Canon with this strategy if it works for them I guess. Multiple people in this thread have stated their intention to upgrade to an R6 knowing how unnecessarily crippled the RP is. When I got the RP, I wasn't expecting top of the line AF, or IBIS, or any of the other headline features Canon has now, but I didn't expect it to be so limited that I would be unable even to take a manual exposure in the same way that the R/Ra allows.

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Exascend Launches Nitro CFexpress – the World’s First VPG400-Certified CFexpress Type B Card

Exascend, Inc., a leader in industrial-grade, enterprise-class and cinematography flash storage solutions launches the world’s first VPG400-certified CFexpress Type B memory card – Exascend Nitro CFexpress. Certified VPG400 by the CompactFlash® Association using its stringent Video Performance Guarantee Profile 4 (VPG400) qualification, Nitro CFexpress delivers incredible sustained video recording performance in even the most demanding cinema camera systems. With 512 GB capacity – over three times the capacity of existing VPG400-rated CFexpress Type A cards – it enables cinematographers to capture long shots without unnecessary interruption. Further fortified with IP67-certified ruggedness, a next-generation-ready CFexpress controller and ultra-thin...

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Do people still experience Blackout on their Canon R5/R6 with the latest firmware update

Last friday I shot around 1700 frames with my gripped R5 (fw 1.5.2) & RF 50mm 1.2L...
I had 1 hiccup in the middle of the birthday party: no blackout (that happened rarely in the past), but the camera froze once: it became unresponsive and the EVF was frozen. Turning it off and on fixed that, no need to remove the battery.
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Patent: Is Canon planning to release catadioptric (mirror) super telephoto lenses?

Specific sky targets such as galaxies and nebulae sit around 200-450mm.
Well it actually depends entirely on which target. Some close by galaxies like Andromeda will fill the frame at those lengths. Others would be better at 1500, others would be better at 3000, etc.
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Review: Canon RF 16mm f/2.8 STM by Christopher Frost

I have the lens too and I’m quite happy for my use cases.


For selfie I don’t care about corner sharpness, but all other aberrations are perfectly controlled.


For astro I won’t use the lens corrections but light frames to deal with vignetting .. no one cares about straight lines for Milky Way photography so I actually get sharpness and contrast where I need it. Coma is fairly okay, worst case I have to stop it down to f4 .. still better then the EF 16-35mm f4L for Milky Way I reckon, it had more aberrations traded for better corner sharpness.


Big plus for the smooth bokeh and close focusing distance!

most annoying is actually the lack of weather proofing, despite its small size I’d like to leave it out for Astro for a couple of hours and don’t have to take it down during a small drizzle.
Where do you base that? I strongly doubt it! Not only from my 16-35 4L IS experience in landscape and astro but also from lenstip,com full review. Sorry but I do not accept your statement. You can like the RF16 all you want or you can pursuade yourself - I do not care - but what you say about 16-35 does not hold.
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My Canon RF 85mm f/2 Macro IS STM Review

I have this lens too and I like it. Yes the AF isn't that fast, but I've also used the 85 1.2 and I didn't find the AF to be much faster on that lens either. Yeah it has the USM which moves faster but it also has a lot more big heavy glass to move at 1.2, which ends up making it kind of a wash imo. But this lens is much cheaper, great IS, and has the Macro/close focusing which are actually improvements over the 1.2 for a lot of people. I wouldn't choose either of the Canon 85s for an application where AF speed was the main requirement.
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CFexpress Options Bloom: More, Faster, Cheaper

For my 5d3 / 5d4 I always used Sandisc cards...
When I got the R5 I switched to Sony Tough, and then when I got a second R5 I picked up an Angelbird card.
The Angelbird card had twice the capacity (512 vs 256,) for close to half the price!!

The Sony is NOT worth the extra money - It gave me a little trouble, but the Angelbird
has been great. Highly recommend!

Angel bird is a great company, with great support.
They may not be as well known as some companies,
but it is easy to see they care about their products -
I have already ordered another 2 Angelbird CFExpress Cards,
and an Angelbird reader (I picked up a Sandisc reader with the first Sony Card)
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