Cambo HR Digaron Macro 105 mm f/5.6 Bedienungsanleitung

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HR Digaron Macro 105 mm f/5.6

High-Performance Lens

for Magnication Scales from 1:4 to 4:1

User Manual

36 x 56 mm

37 x 49 mm

37 x 37 mm

24 x 36 mm

33 x 44 mm

40 x 54 mm

Image circle diameter 82 mm

provides clearance for camera movements

Suitable for

all up to date

sensor formats:

Minimum / maximum subject size with different sensor formats

Sensor format Subject size at 4:1 Subject size at 1:4

36 x 56 mm ≈ 9 x 14 mm ≈ 144 x 224 mm

40 x 54 mm ≈ 10 x 13.5 mm ≈ 160 x 216 mm

37 x 49 mm ≈ 9.3 x 12.3 mm ≈ 148 x 196 mm

36 x 48 mm ≈ 9 x 12 mm ≈ 144 x 192 mm

33 x 44 mm ≈ 8.3 x 11 mm ≈ 132 x 176 mm

24 x 36 mm ≈ 6 x 9 mm ≈ 96 x 144 mm

19.1 x 28.7 mm (APS-H) ≈ 4.8 x 7.2 mm ≈ 76 x 115 mm

15.6 x 23.6 mm (APS-C) ≈ 3.9 x 5.9 mm ≈ 62 x 94 mm

15.1 x 22.7 mm (APS-C Canon) ≈ 3.8 x 5.7 mm ≈ 60 x 91 mm

13.0 x 17.3 mm (FT/MFT) ≈ 3.3 x 4.3 mm ≈ 52 x 69 mm

12 aperture blades for a circular pupil and a perfect bokeh

The HR Digaron Macro 105 mm f/5.6 with 8 lens elements in 4 groups not

only stands out due to its exceptional sharpness, but also due to a per-

fect bokeh thanks to an almost circular aperture with 12 aperture

blades, even when stopped down: light spots outside the depth of eld

are reproduced as homogeneous circular circles of confusion.

Stop down only as far as needed for the wanted depth of eld

!

Because the resolution of this high performance lens is incredibly close

to the diffraction limit, you should always only stop down by as much as

the necessary depth of eld requires. Stepping down does not increase

sharpness (this is already optimum with a full aperture), but produces

diffraction that reduces contrast and resolution. Please remember that

the effective aperture in the macro range becomes much smaller than

for far distances. At a scale of 1:1, the nominal f-number 5.6 becomes an

effective f/11; at a scale of 2:1, it becomes f/16; and at a scale of 3:1,

even f/22. This is why the aperture setting is deliberately limited to the

smallest nominal aperture of f/16.

Suitable for technical cameras, SLR and other system cameras

The large image circle of 82 mm diameter is big enough for even the

largest sensors of professional digital backs and still has sufcient re-

serves for camera movements (parallel shift and/or lens tilt). At the

same time, the exceptional sharpness exceeds that of classical macro

lenses both at very high resolution digital backs and at smaller system

camera sensors (with even smaller pixel pitches in some cases).

The matching to different camera systems takes place using specic

adapters on the V groove interface. Since the optical design of the lens

does not permit a leaf shutter, the camera or the digital back has to

have a focal-plane shutter or a sensor with an electronic shutter.

Focusing can take place by changing the distance from the motif or from

the sensor. The latter is done using a bellows, using the bellows exten-

sion of the camera or using extension rings (with a xed imaging scale)

and a helical focusing mount (for continuous scale changes).

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