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Tamiji Homma
Pooh-Bah
Reged: 02/24/07
Posts: 1085
Loc: California, USA
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Never mind.
I thought FFC works like Takahashi TOA 1.6x extender.
It may work for other configuration.
I just inserted FFC between MarkV and T2 diagonal.
It works now.
But originally I wanted to use FFC as refactor focal
extender than eyepiece focal reducer (magnifier).
I think it is good idea to get power before diagonal and
use long focal eyepiece... Oh well.
Tammy
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Paul C-I
member
Reged: 03/23/08
Posts: 27
Loc: United Kingdom
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A most detailed and informative piece.
Thank you Wargentin for sharing your experience on this.
Very helpful
Paul
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kroum
professor emeritus
Reged: 08/28/08
Posts: 630
Loc: Santa Clara, CA
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Another solution to the focus problems would be a low profile focuser. I got one for my dob and I have about an inch and a half more in-focus than I need, I have to use an extension tube to focus most of my eyepieces. Maybe if I had a binoviewer it would be just right 
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10in Hardin Optical Dob
100mm f6 Orion Achromat
6in Orion Short Tube Reflector
15X70 Barska Binoculars
32mm Astrola (Boo!)
25mm, 12.5mm Sterling Plossls
20mm Orion Expanse
9mm Hardin (GSO) Plossl
7.5mm Orion Ultrascopic
Ultima 2X shorty barlow
Turn on, tune in, and look through the eyepiece.
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davidpitre
Carpal Tunnel
Reged: 05/10/05
Posts: 1824
Loc: Central Texas
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Quote:
Another solution to the focus problems would be a low profile focuser. I got one for my dob and I have about an inch and a half more in-focus than I need, I have to use an extension tube to focus most of my eyepieces. Maybe if I had a binoviewer it would be just right
Are you sure your focuser is not vignetting at this point?
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David
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kroum
professor emeritus
Reged: 08/28/08
Posts: 630
Loc: Santa Clara, CA
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I dont see how it would, it is mounted in the same location as my old one, and it has the same size opening, if it vignetts, so would have the old one no?
--------------------
10in Hardin Optical Dob
100mm f6 Orion Achromat
6in Orion Short Tube Reflector
15X70 Barska Binoculars
32mm Astrola (Boo!)
25mm, 12.5mm Sterling Plossls
20mm Orion Expanse
9mm Hardin (GSO) Plossl
7.5mm Orion Ultrascopic
Ultima 2X shorty barlow
Turn on, tune in, and look through the eyepiece.
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