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TAKAHASHI ANNOUNCES ITS NEW TOA 645 FLATTENER 0.99X FOR ITS TOA TELESCOPES

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TAKAHASHI ANNOUNCES ITS NEW TOA 645 FLATTENER 0.99X FOR ITS TOA TELESCOPES

Today Takahashi announces a new flattener for its TOA- 130 and TOA-150 telescopes. This flattener provides a large image circle to accommodate larger imaging sensors and replaces the 67 flattener, which was discontinued earlier this year.

The newly designed 645 flattener features two fully multi-coated lens elements in two groups and provides outstanding correction out to a 60 mm image circle. Being designed specifically for the TOA-130N and TOA-150B, RMS spot diameters of 1 micron on-axis are achieved. At a 30 mm diameter image circle, the RMS spot diameter is 2 microns, and at 43 mm it is 3 microns. Even out to the full diameter of 60 mm, the RMS spot diameter is 5 microns. With these spot sizes, images are nearly aberration on even the newest small pixel sensors.

 

The flattener is available in two versions, one for the TOA-130N and one for the TOA-150B. Optically, the two versions are identical, with the only difference being the length of the spacer on the camera side of the adapter. Unlike the old 67 flattener, the 645 flattener has an M72 thread on the telescope side, meaning it can be used not only on the TOA-130NFB, but on the TOA-130NS as well. Pricing and part numbers are:

 

Model

Part Number

Retail Price

TOA 645 Flattener 0.99X for TOA-130NS/NFB

TKA31587S

$780

TOA 645 Flattener 0.99X for TOA-150B

TKA32587S

$845

 

 

 

 

These graphs demonstrate the technical performance of the 645 flatteners.



 

Spot Diagram for TOA-130N with TOA 645 Flattener 0.99X

 

 

 

Spot Diagram for TOA-150B with TOA 645 Flattener 0.99X

 

 

 

Light Intensity as a function of radius with TOA 645 Flattener 0.99X

 

System charts for the new flattener are below:

System Chart for TOA-130

System Chart for TOA-130NFB

System Chart for TOA-150

 

The new 645 flatteners are expected to be available in Q4 2021.  The retail price for the TOA-130 version is $780 and for the 150 version is $845.

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