Olympus Mju 410
Camera and Ikelite and Olympus housings
mju 410 Camera
 4.07M Pixels effective.
2272 x 1704 max.
3x optical zoom,
5.8 - 17.4mm, 35mm equiv: 35-105mm. Max aperture: f.3.1 (wide),
f/5.2 (tele).
Focus dist: std: 0.5m - ¥
, macro: 0.2m - ¥, s/macro:
³ 9cm.
Supplied accessory: strap,
32MB xD card, USB cable, A/V cable, Li-ion battery, charger,
mains cable, remote control RM-2, software. |
 Splashproof to
IPX4 |
Olympus
PT-016 Housing for mju / Stylus 300, 400, & 410:
 |
Olympus PT-016 with Epoque DCL-20 M46 wide
lens |
Olympus PT-016 with Epoque
DML-2 M46 macro lens |
|
Ikelite
Housing for Olympus mju / Stylus 300, 400, 410
Housing material: Polycarbonate.
Back door O-ring: 0132.46
Additional lighting:
 Mju cameras do
not use TTL flash. External slave flash triggering will be manual
only. Flash units (strobes) with variable output control or EV
controller are recommended. |
 |
|
mju 410 Underwater
Test Pictures
Despite its smallness and simplicity, the Olympus mju 410 camera
can produce excellent results underwater. The pictures shown
below were obtained using an Ikelite 6138.4 housing. Performance
in the Ikelite housing is particularly good because the housing
has an effective light-trap which prevents light from the internal
flash from leaking into the lens port.
Optical performance using the Olympus PT-016 housing was practically
identical except for some evidnce of light leakage into the port
when using slave flash illumination. This problem is caused by
the silver finish of the camera lens barrel (a triumph of fashion
over good practice - cameras should be black). A strip of self
adhesive foam fitted around the inside of the lens port cures
the problem. |
Internal vs External
Flash
m410
internal flash (zoom = max. wide) |
Ikelite DS-125 slave flash (max. wide) |
The camera internal flash can be used in both the Ikelite and
the Olympus housings but, as is always the case, the illumination
obtainable is somewhat weak underwater; and proximity of the
light source to the lens exacerbates the problems of backscatter
and specular reflection. In the left-hand picture above, the
white spot is caused by direct reflection of the flash from the
test-card. This effect will not be visible in normal underwater
photographs.
The right-hand picture above shows the improvement in illumination
obtained by using an external slave flash - in this case an Ikelite
DS-125 with 4100.6 EV controller. The direct flash reflection
is still slightly visible, indicating that a further improvement
in image quality is obtainable by applying black tape to the
front of the housing to obscure the internal flash. |
Optical Performance
Shown above is a picture taken with the camera zoom set at full
wide (focal length=5.8mm (35mm equiv: 35mm), aperture = f/3.1).
Slight pincushion distortion and corner chromatic aberration
are typical for an air-corrected lens behind a flat port, and
will not be noticeable in normal underwater photographs.
Geometric distortion and chromatic aberration can be removed
from the image using software (e.g., Panorama Tools) if so desired.
Such correction is not essential for normal purposes, but gives
noticeable improvement at high enlargement. The picture corrected
using Panorama Tools, is shown below. |
|
The PanoTools radial correction coefficients which were used
are shown right: |
 |
|
D. W. Knight. Text and photographs
© Cameras Underwater 2004. |
|
M46
(46mm x0.75) filter thread.
Internal flash
can be used underwater. Internal flash can be used to trigger
digital compatible slave.
