The Astro-Physics SBDAPB Riser Blocks are used are used in a variety of configurations to either increase the clearance distance or to allow holes to line up. Here are a few applications:
16" Versatile Dovetail Plate (SBD16) and 12" Dovetail Plate (SBD12) used as an accessory plate with older mounting rings 55RING or 65RING: Refer to Astro-Physics Ring Hole Pattern diagram. Notice that the holes on top of the rings are offset from the middle, but the holes on the bottom of the rings are on the centerline. For this reason, you cannot attach the SBD12 or SBD16 directly to the top of the rings. You must use the SBDAPB to align the holes.
Guidescope: Raise mounting rings holding the scope in order to use a second set of mounting rings as "floating" rings (not attached to the mounting plate) to attach a guidescope.
800 Mount: These Riser Blocks can also be used to attach the 16" Easy-Balance Dovetail Saddle Plate (DOVELM162) to our older 800 mount.
Included:
Two Riser Blocks
Fasteners listed on Mounting Plate Fastener Chart
Specifications:
The Riser Block thickness is 0.5".
Please review the Hole Pattern Chart.
Previous version for reference: Hole Pattern Chart for Previous Version of Riser Blocks.
