Casio EX-V8 Apertures
The Casio V8 has the usual PASM
modes normally associated with larger cameras but there are
limitations. The aperture choice is stated as three apertures only, but
in reality it is two physical apertures and one more simulated in
loss of light terms by introducing a neutral density filter.
This use of the ND filter avoids a true small aperture which would
cause too much image degradation due to diffraction problems caused by
that small aperture. So for real optical effects such as depth of
field, there are actually only two real aperture choices and best to
avoid the smallest apertures in the Aperture 3 column.
A quick run through all focal lengths and checking the three apertures at each focal length yields the following chart.....
| Actual focal length |
Approx 35mm Equivalent |
Aperture 1 |
Aperture 2 |
Aperture 3 |
| 6.3mm |
38mm |
f/3.4 |
f/4.6 |
f/9.2 |
| 7.4mm |
45mm |
f/3.5 |
f/4.8 |
f/9.6 |
| 7.9mm |
48mm |
f/3.6 |
f/4.9 |
f/9.8 |
| 8.9mm |
54mm |
f/3.7 |
f/5.0 |
f/10.0 |
| 10.2mm |
62mm |
f/3.8 |
f/5.2 |
f/10.4 |
| 11.0mm |
66mm |
f/3.9 |
f/5.3 |
f/10.6 |
| 12.6mm |
76mm |
f/4.0 |
f/5.4 |
f/10.8 |
| 15.8mm |
95mm |
f/4.1 |
f/5.6 |
f/11.2 |
| 17.3mm |
104mm |
f/4.2 |
f/5.7 |
f/11.4 |
| 20.5mm |
124mm |
f/4.3 |
f/5.9 |
f/11.8 |
| 22.1mm |
133mm |
f/4.4 |
f/5.9 |
f/11.8 |
| 28.4mm |
171mm |
f/4.5 |
f/6.2 |
f/12.4 |
| 33.1mm |
200mm |
f/4.6 |
f/6.3 |
f/12.6 |
| 37.8mm |
228mm |
f/4.7 |
f/6.4 |
f/12.8 |
| 39.4mm |
238mm |
f/4.8 |
f/6.5 |
f/13.0 |
| 41.0mm |
247mm |
f/5.0 |
f/6.5 |
f/13.0 |
| 42.0mm |
253mm |
f/5.1 |
f/6.5 |
f/13.0 |
| 44.1mm |
266mm |
f/5.3 |
f/6.5 |
f/13.0 |
The long term results may be slightly different from this because the
focal lengths were chosen by observing the largest aperture in Aperture
Priority mode and keep zooming up the range until each most wide open
aperture decimal step
was discovered, such as f/4.0 to f/4.1, then f/4.1 to f/4.2 etc. The
results may be slightly different if zooming from tele end towards
wide.