Use with any 2" Focuser or Star Diagonal for a Greater
Area of Coverage - Threaded for 48 mm Filters as well.

Note :
T-Rings / T-Mounts for most cameras can be had for $4.-
with this purchase, Request Custom Posting.
Many Medium Format T-Mounts in stock as well. (Inquire)

One of Hundreds of other Unique - Rare - Astro Equipment 
and accessories from an Inventory extending from the 1970's.
No Order is Too Small to Process !
Request posting catalog items for eBay purchase - Bundling
is Possible, Email with Your Needs.
Checkout the Entire Inventory Online, Search for :
astroptx

Only Quality Astronomical Filters for the Serious Observer:
Why Use a $1 Filter with Your Fine Oculars !
.965" - 1.25" - 2" (48mm) - etc.
Celestron - Meade - Bausch & Lomb (Japan)
Tiffen (USA)  HR Glass, Stackable in Metal Cells.
Many are Now Posted !