Hi Tony,
Yes, there is a 1.25" version of the 2.5x APO barlow on the GSO page
2.5x magnification, 1.25", fully multi-coated,3 element
apochromatic $49.00
Follow this link
http://www.andrewscom.com.au/site-co...-guansheng.htm
And then scroll down to the barlows.
This is the one I meant before. $20 more than the achro, but worth it.
Cheers
Chris