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spiid
newbie
Reged: 11/03/07
Posts: 1
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Hi,
My set is
1. PST
2. TV 2,5
3. Canon EOS 1D MarkIII
4. T-ring for attaching dslr to pst
My problem is that i cant achieve focus! Can anybody give good advise what i need more to achieve focus for this set?
Thanks
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John Carruthers
Skiprat
Reged: 02/02/07
Posts: 2371
Loc: Kent, UK
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Hi Spiid and welcome to CN, the image plane on a PST lies well down in the eyepiece tube, a Barlow may throw it back far enough for the camera to reach.
--------------------
Jc
ATM 10" F6.1, 1/25th wave spec (max wavefront error +/- 1/12.6 in zone 4 of 6, sodium light )
6" F7 spec
127mm F9.4 Refractor
10 x 50 bin
ETX80 (finder)
Canon 20D
PST
DSI 1
and a curious mind
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colinsk
Carpal Tunnel
Reged: 01/17/08
Posts: 2170
Loc: CA
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On my PST the farthest up I can get the focus with no barlow is 4 to 5mm above the lip of the EP holder. Because the Powermate 2.5 does not insert all the way flush I am not able to get a camera to focus in it. The T-thread adaptor looks like it gives you some more room but I guess is it not enough for you. 
If you find a combination that will come to focus please post it as I am interested as well.
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Mahalo,
Colin Kaminski
Coulter 10.1" Dobsonian
TV-76/Baader Film White Light
LS60T/DS50/FT/BF1200
LDX-75
AT Voyager
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pjstoker
sage
Reged: 04/21/06
Posts: 454
Loc: So. Calif, USA
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I think that what he is referring to is the T-adapter for his Canon EOS. This goes where the camera lens would normally go and allows one to use other T-treaded adapters with the camera.
Pat
--------------------
Patrick Stoker
http://home.earthlink.net/~pjstok/wp10_intro.htm
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