Description
Adapters for 2-inch Focuser Drawtubes
2-inch O.D. Adapters to fit the TCF-S and other 2-inch focusers.
Each of our 2-inch Drawtube adapters are machined to tight tolerances for a smooth, snug fit into the TCF-S and TCF-Si 2-inch focuser drawtubes. A dovetail cut directly matches the thumbscrews on the TCF-S for a secure fit. By tightening the thumbscrews, the adapter is drawn tightly into the focuser’s drawtube.
These 2-inch drawtube adapters will usually fit very well into other manufacturer’s focusers as well. Contact Optec for any 2-inch drawtube adapter not listed here.
#17666 – 2-inch to 3″x24tpi male thread Adapter.
The 2-inch to 3-inch thread adapter was developed to easily adapt the Apogee and SBIG cameras and filters wheels for the TCF-S focuser.
By holding tight tolerances (+/- 0.003″) Optec has achieved a slip-fit that is second-to-none. When used with the TCF-S focuser, the #17666 with its precision machined dovetail cut exactly matches the three thumbscrews on the focuser’s drawtube. By tightening the thumbscrews, the dovetail is drawn tighter to the face of the drawtube completely eliminating flexure.
A word of caution, however, the FLI cameras and filter wheels featuring a 3-inch x 24tpi thread are slightly larger (3.005″). Be certain the #17666 2-inch nosepiece fits snugly into the FLI camera or filter wheel before installing into the TCF-S focuser. Additionally, the FLI filter wheels allow only 0.100″ of thread to extend into the filter wheel body without obstructing the moving filter carousel.
Specifications
- Overall Outside Diameter: 3.2″ (81mm)
- Outside Diameter (drawtube body): 1.995″ (50.7mm)
- Overall Height: 2.32″ (59mm)
- Height of 3×24 threads: 0.22″ (5.6mm)
- Clear Aperture: 1.80″ (45.7mm)
- Weight: 3.0 oz (85 g)
- Back-focus Usage: 0.10″ (2.75 mm)
Compatible with:
- TCF-S or TCF-Si focuser,
- TCF-S3 or TCF-S3i focuser with #17804 3-inch to 2-inch reducer,
- Any manufacturer’s 2-inch focuser or receiver.
Fast Shipping and Professional Packaging
Due to our longstanding partnership with UPS FedEx DHL as well as other major international carriers, we are able to provide various shipping options. Our warehouse personnel will pack each item according to our strict requirements. Before they are shipped, your goods will be thoroughly examined and secured. Everyday, we send to thousands of clients in different countries. This is a sign of our determination to become the largest online retailer globally. The warehouses and centers for distribution are in Europe, as well as the USA.
Note that orders containing more than one item will be processed according to the specific item.
Before shipping before shipping, we'll inspect thoroughly the items you've purchased. Most orders are delivered within 48 hours. The estimated delivery time is between 3 and 7 days.
Returns
The inventory is always changing and we do not fully manage it because of the fact that many parties are involved, including our warehouse and factory. Therefore, the actual inventory could change at any time. It's possible that your order will be unable to fill when you have placed the order.
Our policy is valid for 30 days. If 30 days have gone without a trace since the purchase and we are unable to offer an exchange or refund.
In order for your item to be returned it must be in its original packaging, unopened and in the same condition as when you received it in. It must also be in its original packaging.
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