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

Takahashi 4" Field Flattener for Takahashi TOA-130NFB & TOA-150
Item # TK-TOA130FF
  • The Takahashi 67-FL Flattener attaches to the 4" focusers of the Takahashi TOA-130NFB and TOA-150 refractor.
  • Produces a big 70mm image circle.
  • The Takahashi 67-FL Flattener includes #83 coupling ring to adapt to both telescope unique features.


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
Additional Information

Additional Information

Manufacturer Takahashi
Barrel Size 4"
Warranty 5 Year Warranty

Customer Reviews 2 item(s)

Completely agree with Greg
This flattener made a WORLD of difference from the stock telescope. The images I'm getting with an STL-11000M are astounding with this!
1= Houston, We Have a Problem & 5= It's Out of This World
Review by Chris / (Posted on 3/8/2015)
Do Not Leave the Store Without It
This is an amazing piece of glass, which transforms both the visual and imaging experience when using the TOA-130 NFB. The field curvature of the TOA *must* be corrected for a satisfying imaging or viewing experience, and other flatteners just do not work nearly as well -- believe me, I have tried.

The 67-FL is very forgiving of backfocus distances when used with smaller imaging sensors (up to about 24 millimeters diagonal, and with larger sensors is absolutely required. It is a must-have for imaging of any sort at the native focal length, and is really a should-have for visual use as well, flattening the visual field in a way that thoroughly delights the eye. Even though it adds nearly $1000 to the cost of an already-expensive refractor, your TOA-130 just will *not* live up to its potential without a matched flattening element in the optical train. Takahashi should not allow the TOAs to be sold without this device. Do NOT purchase a TOA refractor without one of these!
1= Houston, We Have a Problem & 5= It's Out of This World
Review by Greg / (Posted on 2/27/2012)
Included Items

Included Items

  • Takahashi 67-FL Flattener
Questions & Answers

Product Questions

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?
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