lhansen
03-12-2014, 10:45 AM
I am looking for expressions of interest for the purchase of 2 telescopes:
Scope 1: Takahashi TOA-=130 with 4” focuser, TOA-FL67 flattener and spacers. I bought this telescope a few years ago and have enjoyed its superb optical quality and ease of use. The 4” focuser is massive and provides a stable platform to carry a large format camera. The flattener produces a superb flat field across an 88mm image circle (60% non-vignetted) allowing the use of large format cameras. Chromatic aberration is negligible with spot sizes varying only minutely across the entire image plane. See the following URL for more information: http://www.takahashi-europe.com/en/TOA-130.specifications.php (http://www.takahashi-europe.com/en/TOA-130.specifications.php)
Images taken with this scope are available on request. Please note that the objective was cleaned and collimated by TNS in 2012 and whilst the surface of the objective looks mottled, the coatings are intact and there has been no negative impacts on the quality of the images.
New this combo would set you back close to AU$9000. I am open to offers but I am looking around $6,000. NOW $5250
Scope 2: GSO R/C 10 steel tube. This scope was a bit of an experiment for me. Optically is it OK but the collimation system was a pain. Therefore I fitted an adjustment collar from which was purchased from Bintel and hacked off the rear of the mirror cell, thereby; reducing the strain on the mirror cell from a heavy imaging train and, allowing independent collimation of optics and camera train. The result has been pretty good however with my STL 11K there is some elongation of stars in the corner, something that could be cure with the appropriate flattener. I used a FLI PDF focuser with this scope and have the adapter to fit the PDF to the fixed instrument adapter.
Images taken with this scope are available on request.
I am unsure what this combo would cost new and I am open to offers but I am looking around $1,600.NOW $1300
Scope 1: Takahashi TOA-=130 with 4” focuser, TOA-FL67 flattener and spacers. I bought this telescope a few years ago and have enjoyed its superb optical quality and ease of use. The 4” focuser is massive and provides a stable platform to carry a large format camera. The flattener produces a superb flat field across an 88mm image circle (60% non-vignetted) allowing the use of large format cameras. Chromatic aberration is negligible with spot sizes varying only minutely across the entire image plane. See the following URL for more information: http://www.takahashi-europe.com/en/TOA-130.specifications.php (http://www.takahashi-europe.com/en/TOA-130.specifications.php)
Images taken with this scope are available on request. Please note that the objective was cleaned and collimated by TNS in 2012 and whilst the surface of the objective looks mottled, the coatings are intact and there has been no negative impacts on the quality of the images.
New this combo would set you back close to AU$9000. I am open to offers but I am looking around $6,000. NOW $5250
Scope 2: GSO R/C 10 steel tube. This scope was a bit of an experiment for me. Optically is it OK but the collimation system was a pain. Therefore I fitted an adjustment collar from which was purchased from Bintel and hacked off the rear of the mirror cell, thereby; reducing the strain on the mirror cell from a heavy imaging train and, allowing independent collimation of optics and camera train. The result has been pretty good however with my STL 11K there is some elongation of stars in the corner, something that could be cure with the appropriate flattener. I used a FLI PDF focuser with this scope and have the adapter to fit the PDF to the fixed instrument adapter.
Images taken with this scope are available on request.
I am unsure what this combo would cost new and I am open to offers but I am looking around $1,600.NOW $1300