Is the Sigma 30mm Prime 1.4 DC DN a good match for the EOS R6 Mark II?

[Prior83]

Hi everyone, I was looking for some advice. 

I have the canon R6 Mark 2 and was looking at a 30mm prime lens. I've seen the Sigma 30mm 1.4 DC DN but am aware it's built for a crop sensor camera. Should I hang fire and wait for a 30mm Prime built specifically for a full frame camera or is this still a good lens that will perform as well? 

[Ron888]

I know nothing of Canon's future plans but they recently launched the 35/1.4 VCM lens.I'd be surprised if they make another around that range for some time

[March411]

If  you mount a crop sensor lens on your R6 MKII it will/should go into crop mode automatically essentially cropping the image to match the smaller sensor area of a crop sensor lens. A full-frame image sensor is physically about 63% or 1.6x larger than an APS-C format image sensor.

The calculation to project the sensor reduction is to use a factor of 2.56. The result for your R6 MkII 24 MP camera I believe would be that your sensor/camera would effectively have an estimated usable 9.4 MP sensor due to the crop.

A fairly substantial reduction of resolution.

[Prior83]

That's really useful. Thank you Marc. 

[ebiggs1]

I wouldn't buy the Sigma 30mm 1.4 DC DN and don't recommend you do either.