The TS Optics filter changer for Canon EOS cameras is a T-ring and filter changer all in one. You can use your DSLR camera like before but you now have the option to add a full size filter without altering the back focus. The filter can be exchanged without touching the camera!

Use in astrophotography:

• If the camera's original IR cut filter has been removed, a separate IR filter can be used
• You can insert contrast enhancing filters like UHC, Deep Sky, Nebula filters
• Enhanced RGB imaging is possible by using narrow-band color filters (see accessories)

Adaptation to correctors and T2 lenses (M42x0.75)

At the telescope side, the filter drawer has a female T-thread. With the optical length of 9 mm plus 1 mm for the spacer, the same length as a standard T2 ring is achieved. Please note that a 1mm spacer is sold separately.

Many correctors have a relatively long T-thread that may intrude the filter drawer and possible cause problems with the filter change. Here, we used the 1mm spacer to prevent this problem.

Which unmounted filters can be used?

TS offers two drawers for the filter changer: one for 36mm filters and one for 50 / 50.4 mm filters. For APS-C cameras, 36mm filters are sufficient so the smaller TSFES36 can be used. For full size DSLR sensors, we recommend the TSFES50. Both are listed in the accessories section.

• T2 ring for filter drawer
• One filter drawer for 50mm unmounted filters
• 1mm spacer is sold separately