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AP Barcon

Started by slick50, 03/21/2008 02:24AM
Posted 03/21/2008 02:24AM Opening Post
Was thinking of trying the AP Barcon? Wanted to use the nose piece on the front of a diagonal to effectively double the FL of the scope and allow the use of longer FL eyepieces?

Would this work well? Would it function like an Extender Q would on a TAk? Any color corrective properties?

Any help would be appreciated.

Thanks,
john
Posted 03/21/2008 03:50PM #1
For visual use you can insert the Barcon into your diagonal to work at x1.7, or before the diagonal to work at x2 ( but you will need in this case an extension tube to focus if I remember well).
For imaging, you can screw only the optical part on your 2" nosepiece ( I personnally prefer the AP16T), and you will get approximately X1.7.
You field you should cover without noticeable degradation is depending on your F scope ratio, the shorter it is the more distorsion you will have.
There is also the Baader FFC which will have some flattening effect, but much more expensive.

Gilles

Gilles Cohen
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http://www.ovision.com/Gilles_Home.html