f/3.4 vs f/4.5. How much difference would it make for the maximum aperture in a nikon zoom lens?
Question by AS: f/3.4 vs f/4.5. How much difference would it make for the maximum aperture in a nikon zoom lens?
Looking for wildlife photography , some even in dawn and dusk. Debating between – AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED and AF-S DX NIKKOR 18-200mm f/3.5-5.6G ED VR II. Have a previous kit lens with nikon D90 in the range of 18-105 so not sure if would be satisfied with 18-200 range so was leaning towards 70-300 range but confused if the maximum aperture of f/3.5 be more practically useful.
Answer by retiredPhil
The f/3.5 is on the wide end of the lens, 18mm. It is not the same as the wide end of the other lens, 70mm. So you cannot compare them. You would have to see what the 18-200mm aperture is at 70mm to compare them. Just running the numbers in my head, they would be very similar.
Since you already cover 18-105mm, it only makes sense to get the 70-300mm. I have used that lens on my D90 and it is very good.
When it gets dark, you will have to use the other two legs of the exposure triangle. If you use a longer shutter speed, it probably will be necessary to use a tripod. Upping the ISO to 800 is no problem, and I’ve gotten some good results at 1600. I avoid anything more than that.
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