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Agena Synta / Vixen Style Deluxe Dovetail Mounting Base / Shoe for Finders – Cross Slot # XFURB

Our Price: $19.95
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In Stock (10+ Available)
Ships by Next Business Day
Our Product ID: OFIN-AG-XFURB
Manufacturer SKU: OFIN-AG-XFURB
Item Can Ship: Worldwide
Agena Synta / Vixen Style Deluxe Dovetail Mounting Base / Shoe for Finders – Cross Slot # XFURB

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Product Details

Agena's new XFURB Deluxe Mounting Base / Shoe features a new, unique cross-slot screw hole pattern, making it usable on a very wide variety of telescope tubes.

This base can be mounted on tubes that are 3.5" or larger in diameter (not telescope aperture), as well as flat surfaces. The long slots on the dovetail base also allow you to suitably position the finder at the most convenient or usable location on your tube or focuser, especially if you attach it to a Crayford focuser body using just a single mounting screw.

The screw slots can accomodate screws up to 5mm in diameter. So commonly used M4 or M5 screws will both work with this. Perpendicular to the optical axis, this base can be used with mounting hole spacings ranging from 10mm - 29mm (0.39" - 1.14") if you use 5mm mounting screws. With 4mm mounting screws, hole spacings can range from 9mm - 30mm (0.35" - 1.18"). Note that this spacing is not sufficient to be used on 8" and larger SCT telescopes if you want to use both mounting screws. However, it will work if you use only one screw, and the attachment will still be very rigid on SCTs.

If you happen to have a telescope tube in which the mounting hole pattern is along the optical axis, then this base can be used for hole spacings ranging from 9mm - 32mm (0.35" - 1.26") with 5mm mounting screws.

Virtually every other dovetail base on the market allows you to use only flat head screws. The recessed screw head slot on this base allows you to use most screws with even oval, hex, button, or other head types besides flat head screws as long as the screw head height does not exceed 3.25mm.

The base is made of die-cast metal and features a smooth black finish and two large locking thumbscrews. The center-to-center distance between the two locking screws is 24mm (0.94"). Total footprint size of this base is 42mm (1.65") perpendicular to the optical axis and 38.9mm (1.53") along the optical axis.

Note that some Synta / Vixen style brackets often have a small extension that slots into compatible bases to prevent slippage. This base does not feature this indented slot, so your finder bracket might stick out of the base by a little bit.

This item now comes with two M5 screws with a round head requiring the use of a hex key (not included) and with a thread length of about 9mm. However, be prepared to replace these with your own screws as (1) the included M5 screws may not match the threaded hole on your telescope and/or (2) the effective availabile thread length of this screw, once mounted, is only 3mm which will be too short for many applications.