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Old 27-06-2019, 07:43 PM
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Off Axis Guider and Reducer for SCT's

Off axis guider for SCT's that have a 2" visual back plus a 0.5x Reducer lens/ Tele-compressor. The OAG has an adapter ring the other end that screws in to standard Nikon, Canon and Sony Nex, T rings.

These were sold to me by a reputable IIS member. I no longer have a C8 and they have sat in my accessory case for too long so I need to let them go as I don't think I'll ever use them now.

I can not work out how they both attach together. You may need an additional adapter to attach them together and more spacer rings to reach focus for both camera and guide camera hence the low price.

I can not find any info online for these or any that look similar but they do come with some old instructions from the film photography days. They are in good condition and will get someone going with off axis guiding or the reducer lens to reduce their image scale for astrophotography. The reducer will make your f/10 SCT into a fast f/5 SCT and reduce your focal length by half as well as your exposure time.

Please don't ask me specifics as I have no idea and all the info I know about them are on the old instruction sheet.

$170 posted Australia wide, registered post.

PM me if interested thanks.

Dave.
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Last edited by Aussie_Dave; 17-07-2019 at 02:14 PM. Reason: Sold to Peter
  #2  
Old 27-06-2019, 07:46 PM
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Ye Oldie instructions.
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Old 29-06-2019, 05:47 PM
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Update: With the help of a fellow IIS member (linkpng) who owns one of these AOG's and focal reducers, thanks mate! I've now managed to attach the focal reducer lens to the OAG. The lens cell part of the focal reducer unscrews and comes out and screws on to the end of the OAG (camera end) with the spacer ring removed. All you would need to do is work out the focus distance from the focal reducer lens to camera sensor. So now they can be used together for guiding

The photos below show the focal reducer lens on the OAG. The first two photos without the space ring, the last photo with the spacer ring on that then screws on to standard thread T-rings. You may still need a spacer ring or two to get the correct distance depending on what camera is used ie DSLR with flip mirror, mirrorless or one shot astronomy camera.
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Last edited by Aussie_Dave; 01-07-2019 at 02:38 PM. Reason: typo
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Old 07-07-2019, 02:23 PM
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$150 posted.
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Old 16-07-2019, 10:08 AM
P1W2 (Peter)
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Hi Dave,
I'm interested, PM sent.
Thanks
Peter
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Old 16-07-2019, 01:14 PM
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PM replied Peter, thanks.
 

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