Takahashi 4" Field Flattener for Takahashi TOA-130NFB & TOA-150

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Takahashi 4" Field Flattener for Takahashi TOA-130NFB & TOA-150

Takahashi The 67-FL Flattener

The Takahashi 67-FL flattener is designed to be used with either the Takahashi TOA-130NFB and/or the Takahashi TOA-150 refractor. Both telescope have unique connections, so a #83 coupling ring is also included in the package which will allow it to adapt to both telescopes or the extension tube.

Get a great flat field with whatever type of system you use!

Takahashi Product Number: TK-67-FL


Accessory TypeFlattener
Free ShippingYes
Warranty5 Year Warranty

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  • What is the metal back distance of the TOA 67 flattener when used with TOA 130 NFB. I have a number of 106.2mm that I have found referenced but not sure if this is correct?

    106.2mm is the correct distance if you are measuring from the M92 thread at the end of the included extension TAR0130 extension tube that comes with the reducer. If you remove the 25mm long spacer ring, the back focus is 131.2mm from the M92 thread on th