Review by Glenn Carpenter for Rating: I was surprised to find, after rinaedg so many positive reviews of this lens, that the copy I received was so fuzzy at wide-open apertures that I could see it on UN-MAGNIFIED images right on my D90 s 3 screen.All lenses lose sharpness at wide apertures: this is a matter of basic physics and is the result of something called spherical aberration. Some are much better than others though, thanks to better optical designs that more effectively correct for this tendency. The 35mm f/2, for example, is very good wide open; the 85mm f/1.8 is decent (and very appropriate for portrait use). My copy of the 50mm f/1.8 lost both sharpness and significant contrast as f/1.8 was approached. I would quantify it as follows:f/1.8: very fuzzy (well beyond soft ), reduced contrast, almost un-useablef/2.8: still quite soft, much improved contrastf/4: slightly soft, good contrastf/5.6: sharp, good contrastf/8: very sharp, good contrastThese results were repeatable on my sample and held true regardless of shutter speed and technique. Notes:- The advantage of a lens like this is the ability to use wide apertures. A good portrait lens need not be particularly sharp, but wider than f/4 my copy of this lens was soft enough that I would use it for nothing other than casual people-photography. It would not suffice for critical night or low-light photography, or for general photography where sharpness might be desired. For photos of people it was fine at f/2.8, but below that it lost so much sharpness, and enough contrast, that photos of almost any subject looked dull.- The lens seems like an obvious choice as a first prime due to its price and the many excellent reviews of it here on Amazon and elsewhere. Even besides the sharpness degradation wide open, I found it less useful than I'd hoped. On a crop-size DSLR, it is a short telephoto lens, and it just hasn't turned out to be a focal length I use all that much. I would urge potential buyers to consider the 35mm f/2 before this lens as it gives the traditional normal perspective on a Nikon crop-size DSLR.- Some reviewers like this lens for portrait use, but again, I found it poorly suited for this. The 85mm f/1.8 is admittedly more expensive, but it has far more potential as a portrait lens. - This is not a high-contrast lens. It does not use any ED glass elements, which seem to be quite magical at improving contrast, and color rendition is noticeably less vibrant than such lenses. For some types of photography this can actually be desirable, but for general or landscape photography I prefer the higher-contrast lenses. - My sample of this lens may have been below average, considering that most reviews of the lens are very positive. However, if you read carefully, most thorough reviews do mention that it loses contrast and acuity at wide apertures. Ken Rockwell, for example, has reviewed the lens very positively, but when it came time to suggest lenses sharp enough to be used on the new D3x, with its ultra-high-resolution sensor, he gave the similar-performing (possibly better) f/1.4 G version only three stars. I would submit that it is really not quite as sharp a lens as its reputation would lead one to believe. My excellent 16-85mm DX zoom, for example (the only lens I've given a five-star review as of this time), is far sharper than this lens up to around f/8 and hold an edge even there and beyond.- Nikon has recently announced a new 35mm f/1.8 DX lens. I've ordered one and will probably post a review once I've had a chance to use it. I would suggest that it is very likely to be a better choice than this lens for almost any DX user. Being designed for the smaller DX sensor, it will probably be optimized for high linear resolutions within the smaller DX image circle. It is also a fairly inexpensive lens, not much more than this lens now that the 50mm has crept up a bit in price.- Even if my sample is significantly poorer than average, my experience indicates that it would be a good idea to thoroughly test a copy of this lens before committing to buy it. Be sure to compare images at wide apertures to those made at f/8, where sharpness should be very good, and determine for yourself whether the loss of sharpness and contrast is acceptable for your purposes.- Focus is plenty quick and accurate, at least on my sample. No problems at all in this regard (and none expected).Final note: This is an honest review of a lens I've actually owned and used, in comparison with other lenses that I've actually owned and used. Unfortunately there are always people who click negative reviews as unhelpful no matter how accurate the review, and that does a dis-service to other Amazon customers as those reviews wind up at the bottom where they are not seen. I wish more honestly critical reviews were available to help me make purchasing decisions, and I hope you think so as well.Other Lenses: I've had the opportunity to own and use many different Nikon lenses and have posted my impressions of some of them here on Amazon. For those interested, here are short summaries. I have used all these lenses on Nikon DX-sized DSLRs, most recently my current D90. Refer to the full reviews for further detail. Nikon 28mm f/2.8 AF-D: *** Competent, sharp lens is a good fit as a bargain DX normal prime. Slow f/2.8 max aperture poor. Very inexpensive in used market.Sigma 30mm f/1.4 HSM: *** Poor focusing consistency and below average large-aperture acuity combine for disappointing real-world performance. Fast max aperture, very capable if used with appropriate care.Nikon 35mm f/1.8 AF-G: ****1/2 Terrific lens at a bargain price. Not without flaws, but excellent in all important respects. A pleasure to use.Nikon 35mm f/2 AF-D: **** Sharp, especially at large apertures, moderate contrast. Classic normal lens for DX but consider new 35mm f/1.8 AF-S instead. Nikon 50mm f/1.8 AF-D: *** My sample was unacceptably poor at large apertures. Perhaps a below-average sample. Focal length not ideally suited to DX. Nikon 16-85mm VR ***** Very sharp at all settings, excellent contrast, very useful zoom range including true wide-angle at 16mm. Excellent VR. Best-kept secret for DX users. Nikon 28-200mm AF-G *** Of two samples, one was excellent and one poor, so watch for sample variations. Very good contrast. Not ideal hand-held due to lack of VR. Not ideal for tripod use due to design. Nikon 55-200mm VR **** Very good lens, very good sharpness and contrast, no fatal flaws. Cheap feel and feature-challenged, but has effective VR. A bargain. Nikon 70-300mm VR *** My sample had very poor performance above 200mm, good to very good elsewhere. Good contrast, generally very good focus performance. Good sports/action lens. Not good where critical sharpness is desired. Possibly a below-average sample.

Review by Sidarta Tanu for Rating: I don't even know where to start. This lens produces sharp pitruces and great color and contrast. And for its price (which seems to climb recently), it is worth more than 5 stars rating. I initially get this lens for low light action and sport photography (as this lens is famous for being one of the fastest lens together with its brother 50mm f/1.4), but I also found out that this lens is also perfect for portrait and other general purposes (macro etc). This is definitely a very versatile lens.As much as I want to encourage everyone to buy this lens right away, let me mention some of the limitation that you would see (which I think will be helpful to go over before deciding to buy this lens):First, being a prime lens, you will need to move your feet a lot to compose your picture. If you are used to zoom lens, don't underestimate this limitation. It takes me a while to get used to it, and sometime I still find people looking at me wondering why I am moving forward and backwards. the good news is that most of the time, they don't think I'm weird, but they are actually wondering if I'm a professional photographer.Secondly, the focal range of 50mm, which is considered the normal lens and great for portrait lens. but on many DSLRs which is not full frame (unless you have a full frame Nikon DSLR like the D700 or D3, then 50mm is 50mm), this lens become a 75mm equivalent which is in the border of a short tele lens. I actually like the 75mm equivalent though I often have to move backwards when taking picture of a group of people.Third, in some situation the autofocus might not able to focus (which is common for many other lens too). It is hard for the autofocus to lock when aiming at a wall that is one color (usually black or white), or on a clear sky (day or night). This kind of makes sense to me actually. IN these situations the AF assist light doesn't help either so you can opt for manual focus or set the focus to infinity when you can't find focus lock on scenic/landscape or sky photography. So far I don't have many problems with the autofocus. Sharpness increases as you stop down to f/2.2 or f/2.5. I actually use f/1.8 most of the time and the results are still nice. Personally, I'd rather use f/1.8 aperture settings than stopped down (e.g to f/2.8) and compensate with higher ISO setting which often gives me grainy picture. But if your object is not moving (static) then it is better to stop down to f/2.8 or more.If you are wondering whether you should get a fast lens or a lens with VR (Vibration Reduction), here's my take: In overall, VR does help a lot (as it will reduce camera shake) and will produce better/sharper picture than equivalent lens without VR (especially if the object is static). If the object is moving (sports/action) then VR feature alone might not help (depending on how fast the object is moving and how much light is available), and a fast lens often end up being a far better solution, even without VR feature as it will allow much faster shutter speed to freeze motion. Using tripod (and a remote) will substitute for the need of VR feature. In general I would recommend getting a fast lens with VR feature (and usually it is expensive) such as the 70-200 f/2.8 VR, but if one can only get for one or the other, then find out what do you want to use the lens for and then use the guideline mentioned here.If you are wondering whether you will get the benefit of buying f/1.4 lens over a f/1.8 lens, just remember that the f/1.4 lens is about 60% faster than f/1.8 at its widest aperture setting. With this information, you can decide if the additional speed will justify the additional cost. The bokeh is nicer as well in f/1.4 lens but I think speed is usually the main factor in deciding whether to get the more expensive f/1.4 lens. Here are the summary of pros and cons for this Nikon 50mm f/1.8D AF lens:Pros:1. Very fast (f/1.8)2. Very sharp pitruces (especially when stopped down to f/2.2, f/2.5 or more.)3. Great for sport/action photography4. Great for indoor and low light situation5. Great for portrait6. Bokeh is almost as good as many expensive Nikon tele-lens7. Fast autofocus8. Good for wedding photography (or no-flash event). However, if this is your main objective then you might want to get the 50mm f/1.4 version or 28-70mm f/2.8 lens)9. 75mm equivalent which can be considered a short tele lens (I actually like the fact that it's 75mm equivalent vs 50mm in DSLR. if you need more zoom, you can get the Nikon 85mm f/1.8, or the 70-200mm f/2.8 VR). If you have full frame DSLR(like the D3 or D700), then this #9 pros is not applicable.10. InexpensiveCons:1. Being prime lens, you need to move your feet a lot to adjust/compose2. Autofocus issue on some situations (read detail above)3. Plasticy build4. Autofocus is not the most silent but very reasonable5. 75mm equivalent with 1.5x multiplier on non full frame DSLR (many people find this is an odd range for normal lens. I actually like it). If you have full frame DSLR(like the D3 or D700), then this #5 cons is not applicable.6. Autofocus does not work with D40, D40x, D60 and D5000. The newer 50mm f/1.4G AF-S lens or 35mm f/1.8G AF-S lens will autofocus with those cameras.Bottom line: This lens is so versatile (and inexpensive) that I think everyone should own in addition to all the lenses that they already have. Being a very fast lens, it enables me to take pitruces in low light (sport/action photography) that I otherwise wouldn't be able to do.After knowing its limitation, I would predict that 99% of you that decides to buy this lens will find this lens very useful. And if you decide that you don't like it (which I think not more than 1%), I'm sure there will be a lot of people who wouldn't mind buying it from you (with some discount of course).Again, I would recommend everyone to get this lens. In some ways I can say that this lens makes me a better photographer.Happy Photographing!Sidarta Tanu

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