The Sony a7IV has been added to DPReview’s studio scene test which you can view for yourself here. It looks like Sony’s new 33MP sensor has pretty good noise performance, but sensor performance has started to equalize in the noise department this year with almost all sensors above 24MP performing very similarly to Sony’s best 24MP sensor when scaled to similar dimensions. This isn’t a bad thing, but unless you’re shooting around base ISO you’re camera’s additional megapixels are kind of wasted.
Sony a7IV: B&H Photo / Amazon / Adorama
Sony a7III: B&H Photo / Amazon / Adorama
Sony a7RIVa: B&H Photo / Amazon / Momentum / Adorama
Sony A1: B&H Photo / Amazon / Moment / Adorama