| Number | Focal Ratio | Image Circle | Backfocus | Price |
| TKA31580 | f5.4 | 44mm | $719 | |
| TKA31580L* | f5.8 | 65mm | 106.2mm | $3000 |
| TKA31580S | f5.8 | $745 | ||
| TKA32580A | f/5.4 | 44mm | $1190 | |
| TOA130R | f/5.76 | $719 |
Apart from the various adapters that I need which one to choose??? Asked on the Uncensored Takahashi mailing list.
* This is the Super Reducer that I tried ...
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Most people pointed to the TKA3250A reducer. This is its spot diagram:
Not quite as good as the .67 flattener but WAY better than the 645 reducer.
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Most people pointed to the TKA3250A reducer. This is its spot diagram:
Not quite as good as the .67 flattener but WAY better than the 645 reducer.
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ReplyDeleteHi Mark - did you eventually solve the issues with your reducer? I have a TOA 130 with a TOA FS reducer(31580) which appears to be producing uneven stars and curvature across the field of my new QSI 6162 APS-H format sensor. Did you get the 32580 reducer and does it give you better results? Cheers Andy
ReplyDeleteHi Andy,
ReplyDeleteNo, I finally gave up on a reducer for the TOA-130 scope. Which is too bad as it would be great to have a slighter larger fow and smaller f-ratio.
... and I'm still mad at Tahahashi for making such an expensive piece of equipment that doesn't really do the work, but hiding it in some obscure documentation.
Interestingly, the TOA-35RD 0.7x (#32580) works much better on the TOA-150 than on the TOA-130, according to Takahashi’s own spot diagrams.
ReplyDelete