(C.Fn-02 = 0)
(C.Fn-02 = 2)
240s
f/8
105mm
240s
f/32
135mm
63s
f/32
135mm
15s
f/9
135mm
30s
f/29
135mm
30s
f/4.5
135mm
1.3s
f/8
40mm
1/10s
f/4
40mm
20s
f/8
105mm
63s
f/32
135mm
240s
f/32
135mm
15s
f/18
135mm
30s
f/4.5
135mm
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Is the 5D "long exposure noise reduction" function (C.Fn-02) useful? Here are my tests.
The pictures are 100% crops. They were photographed in RAW, converted with Photoshop Camera Raw default options (no sharpening) in 16 bits and finally sharpened with Photoshop USM filter using parameters 100%/1px/0.
| Noise reduction Off (C.Fn-02 = 0) |
Noise reduction On (C.Fn-02 = 2) |
|
|---|---|---|
| ISO 800 240s f/8 105mm |
|
|
| ISO 1600 240s f/32 135mm |
|
|
| ISO 1600 63s f/32 135mm |
|
|
| ISO 1600 15s f/9 135mm |
|
|
| ISO 3200 30s f/29 135mm |
|
|
| ISO 100 30s f/4.5 135mm |
|
|
| ISO 800 1.3s f/8 40mm |
|
|
| ISO 800 1/10s f/4 40mm |
|
|
| ISO 800 20s f/8 105mm |
|
|
| ISO 1600 63s f/32 135mm |
|
|
| ISO 1600 240s f/32 135mm |
|
|
| ISO 1600 15s f/18 135mm |
|
|
| ISO 100 30s f/4.5 135mm |
|
|
Conclusion: "Long exposure noise reduction" doesn't make miracles, but in some cases it seems to "smoothen" the worst noise dots somewhat.
© Erkki Vanninen