List of products by brand Borg

Borg 2" M57 eyepiece holder SII 7504 connects to 57mm thread present on many Borg accessories and it provides connection for 50.8mm diameter accessories. On the telescope side it is equipped with a M57 thread, on the other side it offers connection for 50.8mm diameter accessories that are fixed by 2 metal screws.

Borg adapter M68.8 to M57 7507 allow you to connect Borg accessories with M57 thread to M68.8 thread.

Borg additional filter holder 7518 is intended for use with the 7519 filter slider. The 7158 filter holder is able to accommodate both 50,8mm (with 48x0,75 thread) and 52mm filters since it comes with a 52-48 step down adapter.

Borg filter slider 7519 makes changing filters a very simple task! This filter slider threads directly to all M57 threads of Borg telescopes and accessories and integrates a filter holder that lets you insert a 50,8mm or 52mm filter: this way you don't have to remove the camera (or to unscrew something else) to change the filter!

Borg fluorite apochromatic refractor 107FL f3.9 with ESATTO 3", 107mm diameter, 417mm focal length (f3.9), 6 elements fluorite apochromat with Canon lens, carbon fiber tube with 3 inches ESATTO focuser, M57 camera rotator, rear thread for camera connection, PLUS support rings. This wonderful apochromatic refractor with fluorite optics offers an incredible...

Borg fluorite apochromatic refractor 55FL f3.6 with ESATTO 2", 55mm diameter, 200mm focal length (f3.6), 6 elements fluorite apochromat, aluminum tube with ESATTO 2" focuser, rear thread for camera connection, PLUS support rings. Borg fluorite apochromatic refractor 55FL f3.6 with ESATTO 2" offers optical power, mechanical quality and design features at...

Borg fluorite apochromatic refractor 90FL f3.9 with ESATTO 3", 90mm diameter, 350mm focal length (f3.9), 6 elements fluorite apochromat, carbon fiber tube with 3 inches ESATTO focuser, rear thread for camera connection, PLUS support rings.

Borg 7922 extension comes with 49,8mm female thread on telescope side and 49,8mm male thread on camera side. This extension is 21,5mm thick.

Borg 7921 extension comes with 49,8mm female thread on telescope side and 49,8mm male thread on camera side. This extension is 8,2mm thick.

Borg M49.8 adapter 5005 allow you to connect photographic adapters, reducers, field flatteners and Borg telescopes to Canon EOS DSLR cameras.

Borg M49.8 adapter 5011 allow you to connect photographic adapters, reducers, field flatteners and Borg telescopes to Micro Four Thirds cameras.

Borg M49.8 adapter 5003 allow you to connect photographic adapters, reducers, field flatteners and Borg telescopes to Nikon cameras.

Borg M49.8 adapter 5032 allow you to connect photographic adapters, reducers, field flatteners and Borg telescopes to Nikon Z mirrorless cameras.

Borg M49.8 adapter 5007 allow you to connect photographic adapters, reducers, field flatteners and Borg telescopes to Sony Alpha (A mount).

Borg M49.8 adapter 5013 allow you to connect photographic adapters, reducers, field flatteners and Borg telescopes to Sony NEX or newer Alpha cameras.

Borg 7601 extension comes with 57mm female thread on telescope side and 57mm male thread on camera side. This extension is 12mm thick.

Borg 7603 extension comes with 57mm female thread on telescope side and 57mm male thread on camera side. This extension is 40mm thick.

Borg 7604 extension comes with 57mm female thread on telescope side and 57mm male thread on camera side. This extension is 60mm thick.

Borg M57 metal cap 7357 threads directly to M57 threads of the Borg telescopes and accessories.

Borg M57 rotating ring DX 7352 can be threaded directly to M57 threads of the Borg telescopes and accessories. It allows you to manually rotate the connected accessory with a great smoothness and very low backlash.

Borg adapter 7923 converts 57mm thread to a male M49.8 thread without adding extra light path.

Borg adapter 7522 converts 57mm thread to a male T2 only 5mm path.

Borg photographic adapter 7000 allow you to connect focusers, reducers, field flatteners or other accessories that come with M57 thread to the DSLR camera, by adding the proper Borg 500x optional adapter. On the telescope side it has a 57mm thread and a male M49 thread on camera side. Optical length 5mm, 45mm free aperture.