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Sharlin · Saturday at 2:55 PM

Maximilian said:
With the 28-70 STM ending at 70 mm, this 70 mm should be the starting FL and it should go further than 150 mm.
With 200 or else preferred.

You mean Canon doesn't already have 70–200mm RF lenses?

In any case, if this ever becomes reality and is reasonably priced, it would be a perfect partner to a hypothetical, sorely lacking 17ish-50ish mm f/2.8 RF-S. Not every lens needs to be a part of a FF "trinity".

Del Paso · Saturday at 2:53 PM

Snapster said:
Maybe a travel lens to combo with the 14-35 L. Maybe.

Probably still would rather take 70-200 f4 and a fast 50mm prime. Actually this.

That's "exactly" what I do, for day-trips, RF 15-35 f/2,8 + RF 70-200 f/4, each on its own body. I dislike changing lenses (missed occasions and laziness).
But for longer trips, I add the RF 100-500 + EF 24mm TSE + 60mm macro.

P-visie · Saturday at 2:52 PM

PinholeR5 said:
At first look, my feeling was the same. This lens would complement Sigma's 10-18mm and 18-50mm very nicely. But it seems to be too large. I would actually expect (or, perhaps hope) that Sigma would come out with something more like a 50-115mm F2.8 that is more compact.

When I look at the table in the article it lests the lens length as:

176.15 (W) and 236.15(T)

I'm assuming these are in mm. When I look at the spects for the RF 70-200 F2.8 (non-Z) & F4 it lists the lens length as:

F4 : 119 (W) and 181(T) (https://www.the-digital-picture.com/Reviews/Lens-Specifications.aspx?Lens=1529)
F2.8 : 146 (W) and 212(T) (https://www.the-digital-picture.com/Reviews/Lens-Specifications.aspx?Lens=1417)

Which suggests that the 50-150mm would be longer than both of the current RF L non-z 70-200mm. Am I missing something? Is it just the diameter and weight improvements? Lower price? More versatile focal length range? It really doesn't seem to complete the "non-L f/2.8 trinity".

The length in the patent application is from the front of the lens to the image plane, so it includes the 20mm flange distance. So you need to substract 20mm from the lens length in the patent application. The lens size would be almost the same as the RF70-200mm f2.8.

See: https://www.canonrumors.com/canons-new-patent-ultra-compact-body-cap-lenses-for-the-rf-mount/

Nemorino · Saturday at 2:45 PM

R5m2 + RF 100L
stack of 80 frames

R5m2 + Laowa 25mm macro
stack of 21 frames
of this tremella https://www.canonrumors.com/forum/threads/mushrooms-and-fungi-of-any-kind.40761/post-1033480

Nemorino · Saturday at 1:58 PM

50-150 might be a good choice for portrait if you don't need or can afford faster primes.

HeavyPiper · Saturday at 1:44 PM

Snapster said:
Maybe a travel lens to combo with the 14-35 L.

With my 14-35mm f4L and a 50-150mm f2.8 would my travel kit for 90% of my needs.

Click · Saturday at 1:36 PM

Nice series, 7DmkI. I especially like the last one.

PinholeR5 · Saturday at 1:32 PM

axtstern said:
Gentlemen, maybe you are to much focused on the fullframe cult.

This lens is so far only a patent and the optical dimensions make it look like a full frame lens but I believe that fact to be a byproduct.

50-150 slots very nice into the 10-18 and 18-50 row currently occupied by Sigma/Tamron

With any APSC advantages diminishing rapidly after 100mm it makes sense to build a lens which is seen as good quality supplement for poor non pro APSC children of a lesser god like me, while also feeding the cheap R8 clients who jumped for whatever reason onto the fullframe train.

The full frame pros will shun such a non L product so cannibalizing the wrong herd of cash cows will be kept to a minimum .

Sigma tried three times to get such a lens right. I fell in love with their 2nd attempt but not many did. Their 3rd attempt resulted in a lens as big as their 70-200 2.8 and failed to make any impression.

Now Canon comes along and puts lightweight, stabilization, value and no RFS limit for future upgraders into one product. Sounds sexy or?

At first look, my feeling was the same. This lens would complement Sigma's 10-18mm and 18-50mm very nicely. But it seems to be too large. I would actually expect (or, perhaps hope) that Sigma would come out with something more like a 50-115mm F2.8 that is more compact.

When I look at the table in the article it lests the lens length as:

176.15 (W) and 236.15(T)

I'm assuming these are in mm. When I look at the spects for the RF 70-200 F2.8 (non-Z) & F4 it lists the lens length as:

F4 : 119 (W) and 181(T) (https://www.the-digital-picture.com/Reviews/Lens-Specifications.aspx?Lens=1529)
F2.8 : 146 (W) and 212(T) (https://www.the-digital-picture.com/Reviews/Lens-Specifications.aspx?Lens=1417)

Which suggests that the 50-150mm would be longer than both of the current RF L non-z 70-200mm. Am I missing something? Is it just the diameter and weight improvements? Lower price? More versatile focal length range? It really doesn't seem to complete the "non-L f/2.8 trinity".

Snapster · Saturday at 1:31 PM

Maybe a travel lens to combo with the 14-35 L. Maybe.

Probably still would rather take 70-200 f4 and a fast 50mm prime. Actually this.

David_B · Saturday at 11:36 AM

And a separate post for sensor area because forum software..

Image Height	Total Circle Area	Illuminated Sensor Area	Sensor Coverage %
19.96 mm	1,251.62 mm^2	851.20 mm^2	98.5%
21.63 mm	1,469.82 mm^2	864.00 mm^2	100%

David_B · Saturday at 11:33 AM

I thought I'd ask Gemini for some numbers on the image circle...

Feature	19.96 mm Lens	21.63 mm Lens	Difference
Image Circle Radius	19.96 mm	21.63 mm	+1.67 mm
Image Circle Diameter	39.92 mm	43.26 mm	+3.34 mm
Total Projected Area	approx 1251.6 mm^2	approx 1469.8 mm^2	+218.2 mm^2

snapshot · Saturday at 11:22 AM

axtstern said:
Gentlemen, maybe you are to much focused on the fullframe cult.

count me into the full frame cult!

Click · Saturday at 11:21 AM

I really like the eye contact in the first one. You've been spotted.

AlanF · Saturday at 11:19 AM

I've wanted to see a Firecrest for a very long time. Just seen my very first one. It was there for just a few seconds and I had to shoot before adjusting settings. These are tiny crops from the centre at iso 51200, denoised as standard in DxO followed by a run through Topaz. Terrible shots but great for me for the record.

Sporgon · Saturday at 11:15 AM

Tomba said:
You could check the Flickr group for this lens.

I checked it out; some terribly nervous bokeh at f/1.2, the boy on the green slide for instance, looks like the RF 50/1.8 !
The planar optical formula does tend to do this; adding an aspherical element makes it even worse. Even the EF 50/1.2 could get nasty. Kind of makes me confirm that if you want shallow dof and tasty bokeh with a ‘normal’ lens use an 85 or 100.

David_B · Saturday at 11:12 AM

neuroanatomist said:
I'm still waiting for someone to demonstrate in the final image the inferiority of digital geometric distortion correction, compared to optical correction that some people claim is superior. I tried and failed, finding that digital correction was just as good. Since you clearly believe that optical correction is better, perhaps you'll be the one to actually show some evidence to support that belief?

I won't hold my breath.

It can't meaningfully be done with the equipment we have available because you can't use the same lens to do both at the same time, meaning that there will always be differences in the image created.

The best you could do would be to take a lens such as this and create a system where you can alter the position of the sensor relative to the back of the lens so that when it is at 50mm, the position of the sensor is further back allowing the spread of light to cover more area. that assumes that the photos coming out the back of the lens are coming out at an angle.

It would also require custom firmware to record what comes out of the sensor because I think Canon do the stretching very early so you can never see an unstretched image. And custom software to measure the differences (better than pixel peeping by humans.)

Summary: proper comparison is as good as impossible to do for "normal" people so holding your breath for it to be done would not be healthy.

neuroanatomist · Saturday at 11:06 AM

Planterz said:
Hey, lookie here! It's almost exactly the lens so many were adamant that Canon would never make! (hey, I'm surprised too).

Interestingly, it's not an RF-S lens, which makes sense I suppose - if it doesn't benefit from being smaller for APS-C, they might as well make it full frame.

I can’t speak for all of those people, but I thought it extremely unlikely that Canon would make an f/2.8 RF-S lens providing an FoV similar to 70-200 on FF…and this patent doesn’t suggest I’m wrong.

Your claim/request was explicitly for an APS-C lens.

Planterz said:
Sony users have long lamented the lack of a ~45-135mm f2.8 APS-C lens to match the common 70-200m f2.8 telephoto zoom. I think once upon a time Sigma was rumored to be working on one, but clearly that never came to be. Fuji has a 50-140mm f2.8, but they're the only APS-C maker to do so. Now that there's potentially 4 mounts (X, E, Z, RF-S), maybe it'll finally make sense for Sigma or whomever to make one.

This design could become the third lens completing the non-L f/2.8 STM zoom trinity along with the RF 16-28/2.8 and RF 28-70/2.8. All of those lenses give something up compared to their f/2.8 L counterparts, and they also give something up (in addition to the stop of light) compared to their f/4L counterparts though they’re closer in price to the latter.

David_B · Saturday at 11:01 AM

m4ndr4ke said:
That's the thing, yes. Even if being done optically, it's still stretching. Some defend adding, for instance, an extra lens element to straighten the image.
Will that extra element lead to a softer image? Perhaps.

Lets get it right: optical correction is not stretching. The goal with optical correction is to try and ensure that as many individual photons are distinguishable as possible when hitting the thing capturing the image. You can't stretch a photo to make it hit two pixels instead of one, but what you can do is try and ensure that two photons on very similar trajectories hit individual pixels on the sensor.

With firmware/software stretching photon strikes that didn't happen have to be invented.

Del Paso · Saturday at 10:49 AM

I fully agree, but the worst was the choice of 2025's best photo gear.
Sony, Fuji, Nikon, OM, Sigma, Tamron. Canon??? Not one single product chosen...
Very Sony biased, they even warmly praise Sony MILCs (I've learned my lesson

) for their"great ergonomics".
They make me think of the German car magazines, guess which brands win the comparative tests...

EricN · Saturday at 10:05 AM

Del Paso said:
I know, I know!
I wanted to point out that some other reviews are quite positive, I guess it depends on what you're looking for.
This lens is definitely not for me, but others will certainly enjoy using it. Sharpness seekers pass your way. It may not be a lens for MTF or chart photography , but rather for "vintage look" lovers. Bad can sometimes be good, just like my beloved M Summilux 1,4/75 is objectively horrible at f/1,4, yet this is the aperture I most often use...

At least, it's 10mm closer to 35 f/1.2

axtstern · Saturday at 9:56 AM

Gentlemen, maybe you are to much focused on the fullframe cult.

This lens is so far only a patent and the optical dimensions make it look like a full frame lens but I believe that fact to be a byproduct.

50-150 slots very nice into the 10-18 and 18-50 row currently occupied by Sigma/Tamron

With any APSC advantages diminishing rapidly after 100mm it makes sense to build a lens which is seen as good quality supplement for poor non pro APSC children of a lesser god like me, while also feeding the cheap R8 clients who jumped for whatever reason onto the fullframe train.

The full frame pros will shun such a non L product so cannibalizing the wrong herd of cash cows will be kept to a minimum .

Sigma tried three times to get such a lens right. I fell in love with their 2nd attempt but not many did. Their 3rd attempt resulted in a lens as big as their 70-200 2.8 and failed to make any impression.

Now Canon comes along and puts lightweight, stabilization, value and no RFS limit for future upgraders into one product. Sounds sexy or?

Del Paso · Saturday at 9:43 AM

AlanF said:
Optical limits is one of Richard's favourite sites
Summary:
The Good
Very sharp at medium aperture settings
f/1.2 on a budget

The Bad
Blurry corners from f/1.2 to f/2
Excessive axial color fringing at f/1.2
Very pronounced focus shift
Wavy field curvature
Miserable corner bokeh in certain scenes
Overpriced for what it is

1.5/5 stars, Avoid!

Canon RF 45mm f/1.2 STM Review - OpticalLimits

A Canon lens with an aperture of f/1.2 and offered below $500 USD? Can this work out here? Let's check the Canon RF 45mm f/1.2 STM ...

opticallimits.com

I know, I know!
I wanted to point out that some other reviews are quite positive, I guess it depends on what you're looking for.
This lens is definitely not for me, but others will certainly enjoy using it. Sharpness seekers pass your way. It may not be a lens for MTF or chart photography , but rather for "vintage look" lovers. Bad can sometimes be good, just like my beloved M Summilux 1,4/75 is objectively horrible at f/1,4, yet this is the aperture I most often use...

Stig Nygaard · Saturday at 8:54 AM

Hector1970 said:
I don’t get your point. Every Canon Lens fits this. You don’t need dedicated APS-C lens to make it work.

Fullframe lenses are fine for tele lenses. But when it comes to standard and wideangle lenses, fullframe options are generally way bigger and more expensive than dedicated crop-lenses.

Canon APS-C system seriously needs something equivalent to 24-105 on a fullframe (so 15-70mm 'ish).
But maybe there's actually hope for getting a crop-lens like that:

Is Canon Finally Looking at Prosumer RF-S Lenses? - Canon Rumors

This is an exciting patent application from Canon showing a new design for a Canon RF-S 15-70mm and 15-80mm!

www.canonrumors.com

The 16 years old EF-S 15-85mm is still the most used lens on my R7 (Sigma has some nice crop lenses too, but nothing that really can replace this for me).

Tom R5R7 · Saturday at 8:51 AM

On the one hand, this isn't all that different from a 70-200 2.8 L. On the other hand, if the price point is very low, like the 45/1.2, then it's bound to be a winner. People want some aperture, but don't necessarily have a lot of $$$ to spend on it.