http://www.nikonchat.com/nikkor-300mm-f-4-5/
What lens should I buy for my Nikon D40 camera?
I have a Nikon D40 with 18-55mm lens that came with it. I would buy a zoom lens with something better and that works well in low. Any suggestions would be great! I've looked at this other lens recommended yesterday I'm not sure if it would be good low light …. What do think about it? nikon 70-300mm f/4-5.6G AF Nikkor SLR Camera Lens
A 70-300mm f4-5.6 lens is a very bad choice for photography in low light. If low light photography without flash is what you do then a 50mm f1.4 is the goal that you need. No, it is a screenshot of what you have to walk closer or a step back – as we did before zoom lenses were invented. In the 50mm f1.4 lens is 3 points faster than the f4 and 4 stops faster of f5.6. Your next best option would be the AF-S Zoom Nikkor 17-55mm f2.8 and / or the AF-S VR Zoom Nikkor 70-200mm f2.8 – but again they are not as capable as the 50mm f1.4 with little light. This is how it compares with f1.4 f2.8, f4 and f5.6 (this is hypothetical, but 100% applicable to show the ISO / f-stop relationship between shutter speed): ISO 100 f1.4 @ 1 / 125 sec. f2 @ 1 / 60 sec. – A stop of f2.8 to 1 / 30 sec. – 2 stops f4 @ 1 / 15 sec. – 3 stops f5.6 @ 1.8 sec. – 4 stops Sure, you can increase the ISO, but we know the effect on image quality. + 1 stop ISO 200 f1.4 @ 1 / 250 of a second. f2 @ 1 / 125 sec. f2.8 @ 1 / 60 sec. f4 @ 1 / 30 sec. f5.6 at 1 / 15 sec. ISO 400 + 2 stops from f1.4 to 1 / 500 sec. f2 @ 1 / 250 of a second. f2.8 at 1 / 125 sec. f4 @ 1 / 60 sec. f5.6 @ 1 / 30 sec. + 3 stops ISO 800 f1.4 @ 1 / 1000 sec. f2 @ 1 / 500 sec. f2.8 at 1 / 250 of a second. f4 @ 1 / 125 sec. f5.6 at 1 / 60 sec. + 4 stops ISO 1600 f1.4 @ 1 / 2000 sec. f2 @ 1/1000sec. f2.8 at 1 / 500 sec. f4 @ 1 / 250 of a second. f5.6 to 1 / 125 sec. So if you're using a lens 70-300mm f4-5.6 in the same conditions as the 50mm f1.4 will be forced to use ISO 1600 unless the plan shooting only 70 mm, where the goal is f4. You can then use ISO 800. 17-55mm f2.8, $ 1,179.95 USD at B & H. 70-200mm f2.8, USD $ 1,799.95 at B & H. 50mm f1.4, USD $ 479.95 at B & H. http:///www.bhphotovideo.com
Nikon 55-300mm f/4.5-5.6G ED VR AF-S DX NIKKOR Lens for nikon digital slr
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