Moving beyond 35mm DSLR 200911 (English short version)

Moving beyond 35mm DSLR H3DII-39, HTS 1.5, HCD 28

Color

Correctly render the most difficult lighting

Detail

Enough for final crop

Optics

To capture every detail

From the lab

Optical and digital performance

H3DII-39, HTS 1.5 with HCD 28mm, ISO 50.

Nikon D3X, Nikkor TS24, ISO100.

H3DII-50, HTS 1.5 with HCD 28mm, ISO 50. Picture is cropped to reduce image height (non-proportional).

H3DII-31 ISO 100

H3DII-31 ISO 800

Canon ISO800

The colors from the H3DII-31 are rendered correctly at all ISO settings. The colors from the Canon and Nikon c足 ameras show a clear color shift in 足several colors.

H3DII-31 ISO100

Canon ISO100

Nikon ISO100

Nikon D3X, Nikkor TS24, ISO100.

The image shot with the Nikon camera, shows some unnatural saturation whereas the H3DII image show the original colors of the scene.

Taking colors further

The H3DII image has detail all over the 足image area and thanks to the automatic Digital Lens Correction in 足Phocus, there is no visible chromatic 足aberration or distortion in the image.

H3DII-39, HTS 1.5, HCD 28, f/16.

DAC corrected.

H3DII-39, HTS 1.5, HCD 28, f/16.

Nikon D3X, TS-24mm, F/11.

Nikon D3X, TS-24mm, F/11.

The Nikon image has clearly less 足detail and also show some heavy chromatic aberration which cannot easily be corrected for as it is not symmetrical when the lens is shifted.

Taking details further MTF diagram for HCD 28mm and HTS 1.5 at f/6.3.

(10, 20 40 lp/mm) f/6.3

MTF diagram for Nikkor TS-24mm at f/3.5.

(15, 30 60 lp/mm) f/3,5

100

60

MTF [%]

MTF [%]

80

40 20 0 0

10

20

30

40

Distance from Center [mm]

Edge detail from test target image shot with H3DII-39 using HCD 28mm + HTS 1.5 at f/6.3. Area is indicated with a red box in the test target ­image below

0

6

12

18

24

30

Distance from Center [mm]

Edge detail from image shot with Nikon D3X using TS-24mm at f/5.6. Area is indicated with a red box in the test target ­image below.

f/11 100

MTF [%]

80 60 40 20 0 0

10

20

30

Distance from center [mm]

Actual test target (100cm × 75cm) and sample MTF diagram.

The MTF diagram shows the lens performance from the center of the image to the edge as indicated by the two yellow dotted lines.

40

The photo on this page was shot with a state-of-the art 35 mm DSLR system comprising a 21.1 megapixel body and a f1.2/50 mm lens at ISO 100.

The aperture stopped down to f2.0.

The easily visible red fringe running along the line of the shoulder proves that contrast of fine detail is un­ doubtedly compromised by lateral chromatic aberration.

The rendition of low contrast detail in the corner of the image is suffering from the general drop in contrast near the edge of the image circle.

Sharpness isn’t just compromised near the edges of the image. The anti­ aliasing filter in front of the sensor is placing an upper limit on the resolution of lens and sensor combined.

The photo on this page was shot with an H3DII-31 with an HC 80mm lens at ISO 100. The aperture was stopped down to f2.8 to obtain the same depth of field as the 35 mm DSLR systems.

Lateral chromatic aberration is not an issue with the Hasselblad lens.

The advantage of a higher resolution sensor continues to be visible even near the corners of the image, due to much better edge sharpness of the Hasselblad lens.

The high contrast of fine detail that the lens delivers can be fully exploited as there is no anti-aliasing filter limiting the resolution. Moiré artifacts are eliminated by the moiré tool in Phocus.

Extract from Victor 2008 Photokina Special article “...The bigger the better”

Fundamental advantages Larger sensors and higher resolution

More well-defined depth of field

Medium-format CCD’s are more than twice as large as 35 mm sensors.

Due to the larger sensor, a Medium Format camera produces a shorter depth of field at the same ­aperture, than a 35 mm DSLR. E.g. f/2,8 on a 36 × 48 mm format produces the same depth of field as f/2 on 24 × 36 mm format.

H4D-60: 53.7 × 40.2 mm H3DII-39/50: 49.1 × 36.8 mm H3DII-31: 44.2 × 33.1 mm

• The same diameter of aperture or more correctly, the entrance pupil 1 produces the same depth of field on both formats • The larger format requires a longer focal length for the same field of view • The f-number = focal length / diameter of entrance pupil: Same diameter gives a higher f-number on the larger format • The larger f-number reduces aberrations and produces a higher image quality

35 mm DSLR: 36 × 24 mm

1

Entrance pupil: The aperture viewed from the front of the lens.

Larger and brighter viewfinder image Compared to a 35 mm DSLR, the Hasselblad viewfinder image is significantly larger and brighter.

Latest from the lab • F ull automatic Digital Lens Correction support for all HC/HCD lenses • Full Digital Lens Correction support for all Carl Zeiss C type lenses (V System/H System+CF adapter) • Full Digital Lens Correction support for all Carl Zeiss F/FE lenses (V System)

www.hasselblad.com 11.09 - UK v1 - 80500549