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Old Jul 3, 2010, 4:46 PM   #1
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Default Buying a D90- Have old lenses-Advice?

Hello all-

Am graduating from a Panasonic Lumix FZ-20 to a D90. The FZ did some really good things for my basic skills, but took a dive of the dash of my boat and........

My question involves using some old lenses I have from when I invested in Nikon film gear in the mid 90's (just before digital became what it has become ).

My thoughts are to purchase the body first and use the 2 lenses I have now and add others as I go forward, adding better wide angle first and then adding length, such as a Sigma 50-500 later for reach on birds etc.

The lenses I have are:
AF Nikkor 28-85 1:3.5-4.5
Tamron LD 1:4.5-5.6 Tele-Macro 1:3.8

Both Lenses are old but barely used, no drops, scratches etc.

Would this approach work for general photography, some birding, some macro?

If I am correct to 2 lenses give me a 42-127mm for the Nikkor and 105 to 450mm for the Tamron with autofocus on the D90? I also understand the low light limitations of both lenses, but have read that the D90 will help with this due to much improved ISO capabilities?

Thanks in advance,

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Old Jul 3, 2010, 5:12 PM   #2
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The main thing you should know is that the Nikon D90, along with most dSLRs, has a smaller image sensor than the 35mm film exposures you're accustomed to. A 35mm film exposure is 24x36mm, but the APS-C image sensor in the D90 is 18x24mm, so, with the same lenses, it will have a narrower angle of view. The D90's image sensor is 2/3 the size of a 35mm film exposure, or put another way, a 35mm film exposure is 1.5X larger than the APS-C image sensor. It is this 1.5X 'Crop Factor' that gives you a hint at the difference. The 28-85 will have an angle of view of a lens with a focal length 1.5X longer when it's mounted on the D90. So it will work like a 42-127mm lens would on a 35mm film camera. That doesn't change how it operates, but on a 35mm film camera, 28mm was pretty wide, but on an APS-C camera, it's closer to a 'Standard' lens. The downside of all this is that you won't really have anything for wide angle shooting with your D90. As a result, you might want to think about getting an inexpensive lens with a shorter focal length, to make up for that loss. Something like Nikon's 18-55mm kit lens might be a good choice.
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Old Jul 3, 2010, 5:20 PM   #3
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TCav-

Thanks for the reply. As I stated in my post I am aware of the "crop" factor and the first lense I would add would be for wide angle. Am thinking of the Tokina 11-16 or the Sigma 10-20 or the Nikon 10-24.

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Old Jul 3, 2010, 5:56 PM   #4
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A 19mm lens would have a 35mm equivalent focal length of the 28mm you've used with your 28-85mm lens. That's why I suggested the 18-55. All the lenses you've mentioned would leave a significant gap between what they will give you and what you've already got.

But if you're ok with that, I certainly am.
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