A major upgrade of Canon’s popular 70-200mm f/4 IS lens, the new Mark II remains relatively compact and lightweight, but packs a heavyweight punch in terms of performance. The speed and accuracy
70-200mm F4 zoom lenses may not get as much attention as their faster F2.8 siblings, but for many photographers these lenses hit the perfect sweet spot of price, performance, and weight. This week, we shoot the new Tamron 70-210mm F4 alongside the equivalent Canon and Nikon models to see how they stack up.
if I had no need for 2.8 and f/4 was all I wanted, the RF lens is smaller, lighter and the optics are fantastic. I use the same 70-200 and I picked up the f/4 at a Canon store a few months ago and it felt almost criminal how light the f/4 was.

Canon calls this the Canon Zoom Lens EF 70-200mm f/4 L USM. EF: Electronic Focus. All modern Canon lenses do this. L: Expensive as L. USM: Ultra-Sonic Motor: The focus motor operates silently. Optics. Canon 70-200/4 L USM construction. Fluorite and UD elements. 16 elements in 13 groups. One fluorite element for extreme sharpness.

The f/4.0 will focus on par with the 70-200 f/2.8 IS L ii (which I actually had hoped was better than the f/4.0). And for still subjects the IS is really excellent. So for many I guess they would be happy with its performance in low light. The optics of course remain mind blowing.
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The Pentax FA* 80-200mm F2.8. Let's not forget Pentax's previous fast full-frame zoom. This film-era autofocus lens was produced from 1994 to 2004 ( view specifications in our database) but still commands fairly high prices second-hand. We compared this lens to the D FA* 70-200mm and immediately observed that superiority of the newer optical
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canon 70 200 f4 vs f2 8