The first photograph is from my conservatory door across the patio, to centre focus on the basket containing a fuschia, on the right hand side of the archway. The distance is about 10 feet, (3 mtrs). The camera is set on the IA position. NO post processing has been done to any of these photographs, except to add the text and the crop to show the simulated addition of the SIGMA 1.4 Telephoto lens.
ORIGINAL VIEW (click the pic to enlarge)
ZOOM TO 18 X OPTICAL ZOOM (click the pic to enlarge)
SIMULATED 18 X OPTICAL ZOOM BY CROPPING (click the pic to enlarge)
ADDING THE SIGMA 1.4 TELEPHOTO LENS (click the pic to enlarge)
Adding the Sigma 1.4 Telephoto lens, makes the FZ28 into a MAXIMUM OPTICAL ZOOM of 25.2 X Optical Zoom. (40% MORE OPTICAL ZOOM) without any deterioration in the quality of the photograph.
At this level of increase, cropping the original "seems" to give the same result, however, the cropped picture has had the pixels enlarged to produce the result required, and therefore, must, lose some definition in the process, compared to the addition of the Sigma 1.4 telephoto lens.....
Whilst it is an extreme example, you can see what happens when you crop a picture, by looking at the third picture, that has been cropped, to simulate 18 X zoom.. By adding a good quality lens, such as the Sigma 1.4 teleconverter lens, there is no barrel distortion, and no chromatic aberration, as there has been with the other lenses that I have evaluated over the period. These problems can be caused by poor quality lenses, or the different focal length/plane of the combined FZ lens system and the additional. Fortunately, the Sigma lens works very well with the Leica FZ lens system.
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