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Removing the Lens Cover
To protect your C90, the objective lens, rear cell, and accessories are fitted with protective covers. All are
tension-fitted and easily removed by pulling off. The covers should be removed as each piece is installed.
Once removed, place the covers in the box to ensure they won't get lost.
Attaching the Standard Accessories
With your C90 attached to a sturdy mount, as described earlier in this manual, you are ready to
attach the standard accessories. To do this:
1. Remove the protective cover from the rear cell of the C90, the 45º Erect Image Diagonal,
and the eyepiece.
2. Loosen the thumbscrew on the rear cell of the C90 so that the opening (i.e., inner diameter) is
unobstructed.
3. Slide the chrome barrel of the 45º Erect Image Diagonal into the rear cell.
4. Tighten the thumbscrew on the rear cell to hold it in place.
5. Loosen the thumbscrew on the eyepiece holder of the 45º Erect Image Diagonal. Make sure
that it does not block the inner diameter of the eyepiece holder.
6. Insert the chrome barrel of the eyepiece into the 45º Erect Image Diagonal.
7. Tighten the thumbscrew on the 45° Erect Image Diagonal to hold the eyepiece in place.