telephoto lens versus high resolution camera
Shopping for a camera. Should I invest money in a 3MP camera with a 10X zoom like the Canon Powershot S1 IS or go for more resolution in a camera such as 7MP camera with a 4X zoom like the Canon A620? They seem to be close in price. Most prints would probably not be over 4x6. Taking shots at a distance at a concert or a football game would seem to indicate a telephoto lens with a 10X zoom would be better; however, can you not get the same effect by cropping a higher resolution picture from a camera with only a 4X zoom?..

Comments (5)

Optical zoom buys you more than cropping a high res camera. It depends somewhat on the focal lengths involved but there are ways to do mathematical comparisons to see how two or more cameras compare Do a Google search on "figure of merit" and there are some articles which will tell you how to the figures...

Comment #1

Hi James, Craig is right, the math is simple. To print 4x6 you need to have 2 MPs. So with the S1 you can zoom 10X and crop 30%. With the Canon 620 you can zoom 4X and crop 57%. That will get you far from the 10X zoom of the S1. - Itai.

Comment #2

I'm primarily a landscape photographer, and I did extensive online research prior to purchasing my first digital camera. I got a Panasonic DMC-FZ30, and I'm very pleased with it. However, even after reviewing all the detailed technical information from reviews, I discovered one important area that was not covered anywhere: conversion lenses. I knew from the beginning that I would never settle for a lens that was limited to 35 MM (in 35 MM equivalents), so I knew I would use a wide-angle conversion lens. The FZ30 has a 55 MM lens thread, and as it happens, I already had a 0.7X Canon conversion lens I had been using with my camcorder that was 55 MM. What I discovered after using it on the Panasonic was that * The Canon conversion lens markedly softens the images;.

         * The Panasonic instruction book specifies that the wide- angle conversion lens should only be used at the camera's.

           full wide setting that gives a 24.5 MM equivalent. That.

           leaves a big gap from 35 MM to 24.5 MM.

         * There is some vignetting. So now I'm wondering whether it's worth my while to purchase Panasonic's wide-angle conversion lens (DMW-LW55, 0.7X, $250), or another that is 55 MM such as the Olympus WCON-07C ($99.95).

What bugs me about this is that none of my extensive reading prepared me for this, and there doesn't seem to be any information out there about the quality of conversion lenses...

Comment #3

Hi John, The gap is common as most manufacturer's wide-angle converters are designed for the widest settings, effectively making your camera fixed focal length. This is true of Canon, Nikon and Konica-Minolta converters, it may be true of others but I haven't tried them myself. As for fitting, the thread size just means that you can attach it, not that it will perform. The conversion lens must be designed for the lens onto which it is attached and consider the sensor behind it. This is not true in the film world because the imaging cicele is defined by the film format. In the digital camera world, manufacturers use different sensor sizes and make compromises with a lens' performance when designing it.

- Itai.

Comment #4

About FZ30 converters: go and see this page:.

Http:// there some info about different converters one can use with FZ30 Regards..

Comment #5

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