CHAPTER 1. DISCOVER YOUR ALPY 600
outer screw, and tighten carefully the two screws.
The slit is a fragile component - take extra
care when changing its position, and make
sure that you can move it freely, before turning
it.
Cleaning the slit
Over the time, there can be some dust on the slit. A
dust particle in the slit is seen in the image as a dark
line along the dispersion axis. You can clean-up the
slit with a soft, dry cloth, or gently blow away loose
particles.
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