Nikon D40 SLR Camera - Performance and Image Quality
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The performance of the D40 lags in some respects and shines in others. Where the D40 lags is in the autofocus and shutter lag categories. It is relatively slow in both of these, making it a bit slow when shooting objects which are moving, and in turn focus needs to be adjusted. In contrast, the D40 performs quite well in start-up times and shot-to-shot times. It only takes about 0.3 seconds for the D40 to turn on and be ready for its first shot. The shot-to-shot times are equally impressive at about 0.6 seconds between shots which is among the fastest compared to its competitors. Only the Canon Rebel XT is faster at 0.4 seconds between shots.
The battery life is above average with the included rechargeable battery. With typical use, you can expect to get over 450 shots before the battery will need a recharge. Additional batteries may be purchased for around $50, if you expect to need a backup.

The solid performance of this camera also produces great quality images. The 6.1 megapixel CCD sensor is relatively low for a digital SLR, but it still will produce great quality 8x10 photos and even larger with no loss of quality. The ISO performance of the D40 is excellent; it is capable of reaching levels of ISO 3200. Low-light shots with this camera are great, even without the use of the flash. Some people may want higher resolution with their digital SLR, but I have found the 6.1 megapixels to be just fine for this camera. For people who may want the higher resolution, the Rebel XT may be a better choice because it offers 8 megapixels of resolution.
The average, entry-level SLR user will not be disappointed with the performance or the image quality of the D40. You can expect fast and accurate shots with this camera, and for the price, it's hard to beat. For those who may want to step up to the next level of image quality and faster performance, you may want to check out the Nikon D80. The D80 is a great choice, but you will end up paying hundreds of dollars more than you would for the D40.
Summary
Nikon has spent a lot of advertising dollars in promoting the D40 as the top entry-level digital SLR camera on the market today. In my opinion, it is money well spent. This camera is everything Nikon says it is. It's an inexpensive way to enter in to the SLR world for point-and-shoot users. The solid look and feel, along with the fast performance and excellent image quality, make this camera a winner.

The D40 is a great choice for someone who has never had a digital SLR camera in the past. The included lens is perfect for the beginner and performs surprisingly well for a "kit lens." As of this writing, you can find the D40 for just over $500 with a little bit of searching online. Add this price to the cost of a high capacity SD memory card (not included in the kit), and you will be well on your way to producing professional quality photos for under $600.
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