I have a brand new Hotech - Self Centering -Field Flattener for f5-f8 refractors for sale. I bought this Field Flattener for testing on my f5 Achromat scope that I was developing for narrowband imaging. It has only been on the scope twice for spacing and focus testing. It turned out to be unsuitable for that scope (which has a rear mounted Petzval corrector). I have decided to sell that Acrhomat scope and the Flattener is no longer needed.
So I am offering it here for any APO, or other fast refractor owners, that would like this nice Field Flattener.
Hotech Details page here, including a link to a review:
http://www.hotechusa.com/category-s/4.htm
Agena Astro page here:
http://agenaastro.com/hotech-2-sca-field-flattener.html
Current pricing from most retailers is $160 USD plus international shipping (circa $208 Aud).
I am asking $160 for mine, and this includes shipping to any Australian address via Registered Parcel Post.
PM me here if interested.