There are eight focusing screens available for the T90, each one designed for a
specific focusing requirement.
|
Type |
Application |
| A |
Microprism |
Matte/Fresnel field with microprism rangefinder spot in
the center of the screen. Especially suited for general photography when using an aperture
of f/5.6 or larger. |
|
|
|
| B |
New Split |
Matte/Fresnel field with split-image rangefinder spot in
the center of the screen. The lens is in focus when the bottom half is even with the upper
half. Suited for general photography since, unlike former focusing screens, rarely does
one-half of the rangefinder darken, even when using small maximum aperture lenses. |
|
|
|
| C |
All Matte |
Matte/Fresnel field with clear matte center spot.
Especially recommended for macro and telephoto photography, this screen enables the entire
field of view to be seen without distraction. The lens is in focus when the subject can be
clearly seen. |
|
|
|
| D |
Matte/Section |
Similar to C screen but with horizontal and vertical
reference lines. Recommended for architectural photography and copy work in which accurate
image placement is essential. |
|
|
|
| E |
New Split/Microprism |
Standard with the T90. Three focusing methods (split
image, microprism and matte/fresnel) are possible according to preference. |
|
|
|
| H |
Matte/Scale |
Matte/Fresnel field with fine matte center plus
horizontal and vertical scales in millimeters. Recommended for close-ups,
photomacrography, copy work and architectural photography where it is useful to know the
size of the subject or the magnification involved. |
|
|
|
| I |
Double Crosshair Reticle |
Matte/Fresnel field with clear center spot containing
double cross-hair reticle. While focusing, move your eye left to right. If cross-hairs
stay in the same position on the subject, then the subject is in focus. Recommended for
photomicrography, astrophotography, or other applications requiring high magnifications. |
|
|
|
| L |
Cross Split-Image |
Matte/Fresnel field with cross split-image in the center
of the screen which divides the subject in half both horizontally and vertically. The
subject is in focus when the four quarters merge to become one unbroken image. Suitable
for general photography. |
