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Possible Duplicate:
Is there a noticeable difference between 1.8 and 1.4 prime lens?

I am a new to DSLR cameras and I just recently got my Nikon D5100 camera. I am now considering buying a lens (in addition to the kit's one) for the depth of field effect. I found the Nikkor 50mm F1.4D and Nikkor 50mm F1.8D, but I am not sure which one is better:

http://www.amazon.co.uk/Nikon-50mm-F1-8D-Nikkor-Lens/dp/B00005LEN4/ref=pd_cp_ce_1 http://www.amazon.co.uk/Nikon-50mm-1-4D-Nikkor-Lens/dp/B00005LENO/ref=cm_cr_pr_product_top

To me the only difference seems to be in the f-factor :-) But why is the huge difference in price? Are there any differences in picture quality?

marked as duplicate by mattdm, Imre, jrista Oct 23 '11 at 23:23

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  • Although the differences between the lenses are covered in the duplicate, the fact of the matter is that your camera will not support either of the "D" lenses with autofocus -- you need to look at the "G" versions. "D" lenses require a focus motor in the camera body; the D5100 doesn't have that feature. – user2719 Oct 24 '11 at 3:06
  • The problem is not indicated by D, there are many D lenses which will focus on D5100 (like AF-S 300 f/2.8D IF-ED VR or AF-S 17-35 f/2.8D IF-ED). You need AF-S for auto-focusing with D5100, which the 50mm lenses mentioned in question are missing. – Imre Oct 24 '11 at 6:09