Go Back   IceInSpace > Equipment > Astrophotography and Imaging Equipment and Discussions

Thread Tools Rate Thread
Old 23-06-2017, 12:54 PM
Novichok test rabbit

LewisM is offline
Join Date: Aug 2012
Location: Somewhere in the cosmos...
Posts: 9,326
Reducing/flattening an Astro-Physics refractor

I already have the TOA-35R reducer/flattener for my Tak FS-102 (works perfectly), and was wondering, to same some money to use the same reducer/flattener in my Astro-Physics 12Ed refractor - see any issues?

Focal ratio of the Tak is f/8, the AP is 8.5. Focal lengths are close.

All I would need to do is have my mate turn up an AP to Tak adapter, then space it with the adapter I already have for the FS.

Or is this all bad physics and mathematics? Or just try the damned thing

I know the AP telecompressor is cheap enough (cheaper than the Tak), as are their parts, but I am still trying to be frugal
Reply With Quote
Old 23-06-2017, 01:22 PM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
Join Date: Oct 2007
Location: Hinchinbrook
Posts: 18,240
Would that work?
Attached Thumbnails
Click for full-size image (flattener.jpg)
53.1 KB19 views
Reply With Quote
Old 23-06-2017, 02:00 PM
Registered User

casstony is offline
Join Date: Feb 2006
Location: Warragul, Vic
Posts: 4,274
You won't know until you try, unless someone else has tried that configuration.

The TOA/FS reducer doesn't seem to be so good on my TSA120 (still testing) but it's f/7.5; you might be lucky with f/8.5.
Reply With Quote
Old 23-06-2017, 04:38 PM
Slawomir's Avatar
Slawomir (Suavi)
Amateur Photon Collector

Slawomir is online now
Join Date: Sep 2014
Location: Proserpine
Posts: 3,021
I would make adapters for the Tak reducer. Another option: APM's Riccardi 0.75. Probably made in Taiwan, but works with several focal lengths/apertures.
Reply With Quote


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +10. The time is now 04:32 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Meade Australia
Celestron Australia
Lunatico Astronomical
SkyWatcher Australia
OzScopes Authorised Dealer
Astronomy and Electronics Centre