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Bees
super member
Reged: 12/28/07
Posts: 103
Loc: Saskatchewan, Canada
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I'm quite confused between two takahashi telescopes:
1. TSA-102S as shown here: http://tinyurl.com/ynnejd
F8
2. FSQ-106 (just the scope) here: http://tinyurl.com/2ea4eh
Besides the small difference in aperture, the f value is quite different and I'm assuming the FSQ is better for photography because it reduces exposure time. Can you still take pictures with the first option? Will they be as good if you add a focal reducer/field flattener? What about for visual observing? Is it possible in both scopes? Which is better for visual viewing?
I'm so confused. ANY advice would be helpful for me I'm trying to learn everything I can.
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Dean
Post Laureate
Reged: 12/31/04
Posts: 4967
Loc: Bailey Co Elev 8780 feet
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The FSQ is designed specifically for wide field astrophotography with large format CCDs while the TSA-102S can be thought of more as a general purpose APO.
You can certainly image with the TSA and get very good results and use up to about a DSLR sized CCD without needing a flattener, but for a larger chip CCD you will need a flattener and at some point the 2.7" focuser will cause vignetting (esp. with a reducer).
Likewise you can use the FSQ visually, but then you aren't using the features you pay a premium for. The main features of the FSQ that make it a great imaging scope are its very large corrected field - able to cover the largest CCD chip without needing a flattener and a large, heavy duty rotating focuser.
So unless you are planning on imaging with a heavy and/or large format CCD, you won't be taking advantage of the FSQ's features that you pay all that extra $ for. Likewise, if you do use a heavy, large format CCD, the TSA will not be able to produce results like the FSQ.
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"Don't sweat the petty things and don't pet the sweaty things" - George Carlin
deanrowe.net/astro
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