I'm thinking about the D100 for Christmas (or a little after), but only have a superficial knowledge of digital photography. I have two questions -
1 - I understand that there is a 1.5x effect on the lens focal length. My question out of ignorance is, does this have any impact on the maximum aperature? For example, some teleconverters make the effective aperature 5.6 instead of 2.8. Do we have the same situation with digital.
2 - I need to learn more about digital capabilities and how to achieve some of the results I've seen displayed on Nikonians. Do any of you digital mavens have an introductory book to recommend?
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A BAD DAY BEHIND A NIKON BEATS A GOOD DAY BEHIND A DESK - Bob Tomerlin
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#1. "RE: I need a tutorial" | In response to Reply # 0eba Registered since 06th Jun 2002Mon 22-Jul-02 03:50 AM
In the page http://www.nikon.co.jp/main/eng/society/index.htm you will find links to digital photography (in the photoworld section).
You will certainly find some answers to your questions there.
Concerning aperture, the values are the same for digital or standard photography. Aperture can be seen as a ratio between the lens diameter and the focal length of the lens. Not to be confused with the "field" covered by the lens which also depend on the size of the image (ccd or film). So with a 2X converter, you will have a effective aperture of 5.6 instead of 2.8
Hope it helps
#2. "RE: I need a tutorial" | In response to Reply # 0AlanC Basic MemberMon 22-Jul-02 02:27 PM
The 1.5 times multiplier is a misleading term - it's much more accurate to call it a field of view crop.
The D100's sensor measures 23.7mm x 15.6mm so it records the central two thirds of a 35mm frame. The 1.5 times 'multiplier' comes from the fact that if you were shooting film you'd need a lens with a focal length 1.5 times greater to get the same field of view.
There's no effect on any other aspect of the lens: maximum apertures and depth of field stay the same, so it's not like permanently having a teleconverter on the camera.
As to books on the subject, I'm not sure. Relatively affordable digital SLRs are a new thing, so the majority of books that are around at the moment target the compact digitals.