Lens Characteristics and Specifi cations
253
entitled “Lenses for Digital Imaging.” DAC can only provide great image quality on a lens that
is optically designed to produce that quality. It cannot produce good image quality from an
inferior lens. The quality improvement that DAC can make is shown in Figure 14-16. The MTF
diagrams show clearly that the HC 35 has excellent quality even without DAC.
The diagram shows that the basic optical design produces excellent image quality even
without DAC. MTF diagrams are discussed in detail in this chapter in the section entitled
“Lens Quality Information.”
Figure 14-16
Digital APO correction. The red dotted lines in the MTF diagrams for the HC 35 mm
show the improvements made by the DAC correction at
f
/3.5 (left) and at
f
/8 on the right.
0
0.2
0.4
0.6
0.8
1.0
0
10
20
30
f/3.5
0
0.2
0.4
0.6
0.8
1.0
0
10
20
30
f/8
The HCD 4/28 mm Lens
The designation D indicates that this retrofocus wide angle lens can only be used for digital
imaging not for fi lm photography and only on H3D and H3DII camera models. There are two
reasons for this limitation: as part of the design brief, the lens has been designed with soft-
ware correction that works only with the H3 cameras which transmit the lens data to the
computer and the lens is optically designed to cover the diagonal of the 36.7
49.0 sensor
only, not the larger fi lm format. This allowed producing a lens with an exceptionally large,
practically unknown 95-degree angle of view for digital recording. The 28 mm lens also can-
not be used with the Converter H1.7x. The lens design of the HCD 28 mm lens is shown in
Figure 3-7 in Chapter 3. DAC improves the distortion correction on this lens.
WIDE ANGLE LENS DESIGNS
Biogon and Distagon are wide angle lens designs with two completely different optical con-
fi gurations. The Biogon is an optically true wide angle lens (the classic design that is still used
for wide-angle lenses on large-format cameras) known for its superb corner-to-corner quality
Содержание Digital Camera
Страница 1: ......
Страница 2: ...The Hasselblad Manual ...
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Страница 165: ...Heidi Niemala Editorial photograph made with a 50mm lens in the basement of a pre Civil War building ...
Страница 166: ...Heidi Niemala Photographed for clothing designer with a 150mm lens ...
Страница 167: ...Heidi Niemala Editorial portrait with a 150mm lens ...
Страница 168: ...Heidi Niemala Photographed with a 50mm lens during a sand storm at White Sands ...
Страница 198: ...Jonathan Exley An attention creating image of mult time Indianapolis 500 winner Helio Castroneves ...
Страница 200: ...Jonathan Exley Lifestyle Designer Kathy Ireland Courtesy of kathyireland com ...
Страница 243: ...Marco Grob Singer Alvin Chea from theTake 6 band photographed with an HC 2 8 80mm lens on an H camera ...
Страница 244: ...Marco Grob A make up test shot made with an HC Macro 4 120mm lens on an H camera ...
Страница 247: ...Marco Grob The Stairs photographed in CapeTown for Glamour magazine with an HC 3 5 50mm lens on an H camera ...
Страница 312: ...Raya High jewlery photograph produced with an HC 3 2 150mm lens on an H camera Raya Photographer ...
Страница 381: ...366 THE HASSELBLAD MANUAL Chart A2 Area coverage in inches with single extension tubes for the 6 4 5 film format ...
Страница 383: ...368 THE HASSELBLAD MANUAL Chart A4 Area coverage in inches with single extension tables for the 33 1 44 2 sensor ...
Страница 385: ...370 THE HASSELBLAD MANUAL Chart A6 Area coverage in inches with combinations of tubes for the 6 4 5 film format ...
Страница 387: ...372 THE HASSELBLAD MANUAL Chart A8 Area coverage in inches with combinations of tables for the 33 1 44 2 sensor ...
Страница 397: ...Chart D Close up charts for 80 to 250mm Hasselblad lenses an 503 and other V system SLR cameras based on the film format ...
Страница 398: ...Close Up Photography on Film or Digital 383 ...
Страница 400: ...Jonathan Singer ...
Страница 401: ...Jonathan Singer ...
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