Olympus VANOX-T - Page 37

D. Special Applications
The special applications introduced here can help to produce im
proved photomicrographs under certain conditions
1, Average exposure measurement for distribution of specimen
sure can be adjusted using the adjustment b
of specimen exhibit ightness, 9.9. dark
rescence illumination, ete., or low contrast chromosomes in brigh
field illumination, etc. (Fig. 58)
4 Specimen conditions and exposure control with ISO/ASA 100 film
in bright field 05
‘Objects are spread throughout
Position of | ISO/ASA| Exposure
posure rating varia
Objects sp
e the field Ш | № dl
Objects spread in dark field 2 200. | 1 full stop under
‘Objects
scattered
thinly
in
5
mme
dark fila
The exposure adi. button is adjustable in increments of 1/3 stops.
# If the entire adjustment range of the exposure adj. button is in
sufficient, use the film speed button, for additional correction.
* An average measurement is pertormed in the central integrated
measurement area (18mm diameter) on 35mm film plane
Exposure gg
2. Spot exposure measurement
1) Press the spot measurement button (Band ascertain that the wo!
| ing light located above the button is blinking. (Fig. 59)
2) Bring the specimen detail to b ší Toto pdt me
* From the standpoint of framing the picture, if the specimen
detail is not supposed to be in the spot area or İn case of a speci
men quick to fade, the use of the LOCK button is recom
mended, (Read page 35 for use of the LOCK button.)