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[…] Autofocus was fantastic, image quality looks great, and the lens remains very impressive despite its small size.

This is a great little general purpose/travel lens, as it affords enough flexibility in the focal length to shoot many scenes, and the constant maximum aperture of F2.8 gives you more flexibility in different lighting situations.

It’s great to see Canon’s RF mount starting to open to these third party offerings, and very quickly we will see the amount of lenses available for RF-S (APS-C) tripled due to Canon’s move to open the protocols. This lens isn’t cheap, per se, at $599 USD, but I’d rather spend a few hundred extra bucks to buy this lens over the current Canon options any day of the week.

Pros:

Fantastic job porting to Canon

Extremely compact and lightweight

Nicely made with a weather sealing gasket

Useful focal range with constant F2.8 aperture

Great autofocus performance

Good video AF performance

Minimal focus breathing

Good sharpness across zoom range

Nice bokeh in most situations

Fairly good coma performance

Nice build and handling than RF lenses

Cons:

No optical stabilizer

Fairly strong barrel distortion at 18mm

Some ghosting in certain lighting conditions

Flare for RF lens mount slightly interferes with MF ring

I strongly recommend you have a look to Dustin Abbott’s review, beyond what is featured here. The review is comprehensive and delivers all the information you night want to know. Moreover, the review comes with sample images, test charts, and more. So, if you are on the fence for the this little Sigma jewel, have a look at the review.

If you prefer to watch the review, we got you covered too. Just start the video below.

Sigma 18-50mm F2.8 DN:

America: B&H Photo, Amazon USA, Amazon Canada, Canon Canada, Canon USA
Europe & UK: Amazon DE, Amazon UK, Amazon IT, Canon IT, WEX Photographic, Canon FR, Canon UK, Canon DE

Canon Patent: 200-1000mm F6.3-9 IS Lens For RF Mounts

August 19, 2024
Canon Patents
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Here is a new Canon patent application.

Canon patent application 2024111453 (Japan, published 8/19/2024) discusses optical formulas for a telephoto zoom lens, the 200-1000mm F6.3-9 IS.

Example 1

Focal length: 203.00-776.00
F-number: 6.42-9.18
Half angle of view: 6.08-1.60
Image height: 21.64
Total length: 331.63-421.61
Back Focus: 37.98-96.27

Example 2

Focal length: 203.00-699.99
F-number: 5.60-7.10
Half angle of view: 6.08-1.77
Image height: 21.64
Total length: 347.80-447.80
Back Focus: 38.65-94.84

Example 3

Focal length: 158.88-600.00
F-number: 5.89-9.18
Half angle of view: 7.75-2.07
Image height: 21.64
Overall length: 332.30-447.10
Back focus: 38.50-92.00

Example 4

Focal length: 199.98-980.38
F-number: 6.43-9.18
Half angle of view: 6.17-1.26
Image height: 21.64
Total length: 362.79-482.80
Back focus: 38.64-100.15

More Canon patents are listed here.

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Canon EOS R5 Mark II: Dynamic Range vs ISO Settings (little changed since original EOS R)

August 14, 2024
Canon Reviews
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Photons to Photo has published their dynamic range settings for the brand new Canon EOS R5 Mark II (preorder here).

EOS R5 Mark II at a glance:

45MP Full-Frame Stacked BSI CMOS Sensor
DIGIC Accelerator Processing
Dual Pixel Intelligent AF, Eye Control
8K 60 Raw/4K 60 SRAW/4K 120 10-Bit Video
Up to 30 fps, Pre-Continuous Shoot Mode
5.76m-Dot EVF with OVF Sim. View Assist
3.2″ Vari-Angle Touchscreen LCD
In-Camera Upscaling to 179MP
CFexpress & SD UHS-II Memory Card Slots
Wi-Fi 6E/Wi-Fi 6 Support

As you can see in the chart below, dynamic range has changed little since the original EOS R, and it’s basically the same as the EOS R3. So, forget about this pixel peepers stuff, take the camera you have, and go out snapping pics.

Canon EOS R5 Mark II preorder:

America: B&H Photo, Amazon USA, Amazon Canada, Canon Canada, Canon USA
Europe & UK: Amazon DE, Amazon UK, Amazon IT, Canon IT, WEX Photographic, Canon FR, Canon UK, Canon DE

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Canon Patent: RF 28-70mm F2.8 Lens

August 7, 2024
Canon Patents
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Canon patent application 2024104916 (Japan, published on August 6, 2024) discusses various optical formulas for a yet to be released RF lens: 28-70mm f2.8.

From the patent literature:

Description of the Related Art: In recent years, imaging optical systems used in imaging devices have been required to have high optical performance, a high zoom ratio, and a small size.
The zoom lens of Patent Document 1 has a lens group arranged in the order of positive, negative, positive, positive, negative, positive, from the object side to the image side. However, since the refractive power of the second lens group is strong, the chromatic aberration of magnification at the wide-angle end tends to become large, and the fluctuation of the curvature of field occurring during zooming tends to become large .
SUMMARY OF THE PRESENT EMBODIMENTS: An object of the present invention is to provide a zoom lens which has high optical performance, a high zoom ratio and is compact.

Example 1