SIGMA to start producing RF mount lenses in 2021

Starting out EOS R

EOS R5 - RF24-105mm F4L, RF70-200mm f2.8L
Feb 13, 2020
294
314
Every comparison I have seen suggest it's one of the worst modern 70-200's optically. Not nearly as good as the EF II or III when compared side by side. It's small, light and good enough but clearly compromises were made to obtain the small size and light weight.
Not sure which reviews you have read as most of the main one's doing direct comparisons say its a better lens, plus have experienced it yourself as my experience is it's a 1st class lens with great optics, especially when paired with the R5.
 

BirdDudeJosh

I'm New Here
Feb 6, 2020
19
17
Not sure which reviews you have read as most of the main one's doing direct comparisons say its a better lens, plus have experienced it yourself as my experience is it's a 1st class lens with great optics, especially when paired with the R5.
Christopher Frost and Dustin Abbot both clearly illustrate the weaknesses of the RF 70-200 f2.8. I am making the assumption that the reduced size, weight and are a factor in its poor performance but it certainly doesn't live up to the price tag or the expectation.
Specifically its corners suck wide open at all focal lengths and vignette and distortion middle of the road and certainly not "1st class".
 

Starting out EOS R

EOS R5 - RF24-105mm F4L, RF70-200mm f2.8L
Feb 13, 2020
294
314
Christopher Frost and Dustin Abbot both clearly illustrate the weaknesses of the RF 70-200 f2.8. I am making the assumption that the reduced size, weight and are a factor in its poor performance but it certainly doesn't live up to the price tag or the expectation.
Specifically its corners suck wide open at all focal lengths and vignette and distortion middle of the road and certainly not "1st class".
Well each to their own as they say. I've had no issues at all but then if you pixel peep and push it to extremes, any lens will struggle.
 

Johnw

EOS R5, Ra
Oct 10, 2020
8
2
I'm intrigued what people use the control ring for. I have a mix of EF and RF lenses now and haven't used the control ring as the R5 has 3 ring/dials + joystick already.
I use it for aperture since I have a couple of manual aperture lenses as well, so that way I always know aperture is a lens ring.
 

Coffy83

I'm New Here
Jul 10, 2020
15
6
Germany
Christopher Frost and Dustin Abbot both clearly illustrate the weaknesses of the RF 70-200 f2.8. I am making the assumption that the reduced size, weight and are a factor in its poor performance but it certainly doesn't live up to the price tag or the expectation.
Specifically its corners suck wide open at all focal lengths and vignette and distortion middle of the road and certainly not "1st class".
Poor performance? Lol
I have had the old EF one and the new one...they are both great but the RF is better. It is an amazing lens and now actually fits mounted on the camera in my small camera bag...what more could you want? I actually did a comparison between 8 135mm prime lenses and for the fun of it included the RF 70-200 in the test...it beat all of them in sharpness and contrast even at f2.8....I don’t think I have to mention the autofocus...best I have ever used.

By the way, I don’t know what reviews you watched, both Frost and Abbot praise the lens. Frost calls it “a masterpiece, not perfect but excellent“.
 
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JordanCS13

EOS R5 | R6
Aug 1, 2020
18
57
www.admiringlight.com
Christopher Frost and Dustin Abbot both clearly illustrate the weaknesses of the RF 70-200 f2.8. I am making the assumption that the reduced size, weight and are a factor in its poor performance but it certainly doesn't live up to the price tag or the expectation.
Specifically its corners suck wide open at all focal lengths and vignette and distortion middle of the road and certainly not "1st class".
Dustin Abbott had a bum copy of this lens no doubt. I have never seen images even remotely as bad as his corners in any shots with my lens. I did a comparison test with the RF 70-200/4L last week, and you can see the 100% corner crops throughout the range. It's not absolutely 100% perfect at f/2.8 throughout the range, but it's very good throughout the range. 70mm is the worst focal length for the corners, but even there it's decent.
 
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Nemorino

EOS R
Aug 29, 2020
124
145
Sigma released another interesting lens for FF mirrorless:
A 28-70mm f/2.8 contemporary priced 850€, weight under 500g and a 67mm filterthread.
Sadly only in E- and L-mount available.

Hope Sigma will join the RF party soon!
 
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