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©
2019: Stefan M. Bruehlmann-Fujii (Switzerland)
- 17 July
2019
Film: ILFORD SFX ISO 200
Camera: OLYMPUS OM-1
Lens: OM 24mm (f.2.8)
Filter : HOYA 72R
Tripod : Velbon
Sherpa
Condition : full sunlight ; (July
2019 ; afternoon)
Film development: ILFORD Ilfosol3 (6 Min)
TETENAL SUPERFIX (7 Min)
TETENAL
Mirasol (1 Min)
Remarks : These
are the results of a first trial with the IR-Film ILFORD SFX 200
Own film development with JOBO
equipment. Hybrid mode: Scanning with EPSON V300 PHOTO, no post-treatment
Measured exposure (without
filter): 1/250 sec - f16
With the Hoya 72R filter
mounted, it it
suggested to open up 4 stops of aperture to achieve a correct
exposure. From there, several variations
(bracketing) were done:
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Speed: 1/250 sec
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f 2.8 (-5stops)
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f4 (-4 stops)
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f5.6 (-3 stops)
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Remarks: Mounted lens hood led to vignetting in the corners
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Aperture: f16
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Speed 1/8
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Speed 1/15
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Speed 1/30
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Remarks: Mounted lens hood led to vignetting
in the corners
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Speed: 1/60 sec
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f2.8
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f4
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f5.6
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Remarks: Mounted lens hood led to vignetting
in the corners
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Aperture: f16
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Speed 1/2
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Speed 1/4
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Speed 1/8
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Remarks: Mounted lens hood led vignetting
in the corners; Speed 1/2 and
1/4 produces over-exposed image
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Speed: 1/1000 sec
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f2.8
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f4
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f5.6
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Remarks: no mounted lens hood; images under-exposed; EPSON scanner could not recognize the
image with f5.6 because of too little contrast; therefore manual marks with felt-pen were
applied.
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Speed 1/30
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Speed 1/60
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Speed 1/125
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Remarks: no mounted lens hood; all
images rather underexposed
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Speed 1/125 sec
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f2.8
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F4
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F5.6
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Remarks: no mounted lens hood
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Aperture: f16
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Speed 1/4
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Speed 1/8
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Speed 1/15
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Remarks: no mounted lens hood
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Aperture: f4
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Speed 1/30
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Speed 160
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Speed 1/125
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Remarks: no mounted lens hood
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Aperture: f2.8
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Speed 1/30
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Speed 160
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Speed 1/125
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Remarks: no mounted lens hood
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Aperture: f5.6
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Speed 1/2
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Speed 1/4
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Speed 1/8
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Remarks: no mounted lens hood; overexposed, strong grain
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Speed 4 sec
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Speed 6 sec
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f5.6
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f5.6
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Remarks: no mounted lens hood; results are useless, strong grain
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Summary: The
best results are achieved by following the 4 stop rule. (correction of 4 stops from the
measurement without the IR-filter).
The aperture itself does not seem to have much impact on the grain.
Overexposure – however –
produces strong grain. Overall, the
IR-effect (white foliage etc.) does not look very distinct. One reason could be that the scenery of
this tests did not provide many trees with young foliage.
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Feedback: photo@dentaku.ch
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