Quote:
Originally Posted by Hans Tucker
Ok, I will bite. What makes the TOA150 & 130 different to a "regular" triplet. The TOA's are no different to the Astro-Physics & TEC refractors. The only thing different it the set-up of the collimation screws, they are in pairs in a push-pull design...the same design as in my Mewlon 250 and in its big brother the 300. Looking at my FS-78, which the objective is in a cell that can be collimated, I note the collimation screws are in a paired layout. No Lewis, there is nothing special about the TOA's above any other high end triplet.
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Hans, I have actually been on the phone to Fred at TNR a couple of years ago and he gave me a rather comprehensive run down of the Tak TOA's and basically said that they were much different to collimate than the conventional APO triplets and he most definitely would not feel comfortable trying to talk anyone through collimating one. They use specialised equipment for their collimating which I believe is not available to the general public. It may even be something that Takahashi developed, but that is only supposition on my part.
