![]() ![]() I’ve been able to pull off usable handheld shots at around 1/10th or 1/15th of a second when that would be practically impossible (for me) without image stabilization.The following shot was made with my 24-70mm lens at 70mm, at the lenses maximum aperture of f/2.8 and since the sun had just gone done and I was losing light fast, I ramped up the ISO to 800 knowing full well my Canon 5D Mark II could handle that with no problems. By setting the shutter speed slower, it lets in more light,giving you extra stops of light.This is all relative to how shaky your hands are when holding the camera. What they mean is that you should be able to set your shutter speed much slower than you normally could if you were handholding the camera. Being able to open your aperture from f/4.0 to f/2.8 is exactly one full stop of light however camera manufacturers will tell you that having a stabilization system in the lens will give you an extra 2-4 stops of light. ![]() Lets start off talking about the elephant in the room about these two lenses. Since I’m a Canon guy, and I own a full frame camera and the EF 24-70mm f/2.8L lens, and my friend is letting me borrow his cropped sensor camera and EF 24-105mm f/4 IS lens, I figured this would be a great time to finally give people some answers to these questions. Other factors that people ask about is how the bokeh is for each lens, what is the difference in reach look like, does the image stabilization counteract the f-stop difference, what is the difference when using a full frame vs cropped sensor camera, and how sharp one is against the other. The biggest difference that pops out is the f/2.8 lenses do have that extra stop of light but the f/4 lenses both have image stabilization (or vibration reduction). When people ask this question, many times they are asking about Canon’s 24-70mm f/2.8L (or Nikon’s 24-70mm f/2.8G version) lens vs Canon’s 24-105mm f/4L IS lens (or Nikon’s 24-120mm f/4G VR) lens. But it’s not quite that simple is it? Here’s our thoughts on f2.8 vs f4 lenses. Of course if this was the only factor to the question, my answer would be hands-down the 2.8 since it is a full stop faster than the other. Both f-stops are very popular and are on many of todays most popular lenses. This is a question we hear quite often here at The Phoblographer. ![]()
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