Hi Tindomul, This reply is a few months after your question of why the Nikon 105mm but I thought I would reply anyways. I bought the newer version of this lens called the "AF-S VR Micro-Nikkor 105mm f2.8G IF-ED". That's a lot of title, but it is basically a macro 105mm lens with a nice large aperture of f2.8 and vibration reduction and great glass etc. It is rather expensive but you can buy a used one of the older model. It is also an excellent lens and had the f2.8 aperture, just not vibration reduction (VR) and a few new features like the silent wave motor for focusing. When you have the camera on a tripod you turn of the VR anyways. This lens is a nice in-between of the other two standard focal lengths for macros which is usually in the neighbourhood of 60mm and 200mm. With the 60mm you need to get real close and if you do bugs etc. that is not always possible. With the 200mm it is difficult to focus in confined areas at times as it is a long focal length. So you have to decide what suits you best, but they are all awesome lenses and the older models still get rave reviews from their owners. You can get less expensive macros but they usually come with a smaller aperture range such as starting at f4. The large aperture is important to allow you to use faster shutter speeds which are required when shooting outdoors in a breeze or shooting insects etc. However, quite often f2.8 gives too small a depth of field anyways so again you must decide what you are shooting. I love this 105mm macro and have used it a lot. It is also a great portrait and general use lens. I hope that helps.
Silken
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