For working photographic there are the Intes Micro Mak-Newtons a very interesting alternative to the Apos.
For introduce you this very good telescopes I will offer you as follow
Intes Micro MN 56 Mak-Newton telescope. This is a 5" f/6 system with a focal length of 762 mm.
This System got a optical quality of L/6 ptv vawefront at 632,8 nm
More informations about this system you can find here
http://www.hoo-germany.de/produkt.php?prd=1
The price without VAT but include Dew-shield and shipping to Singapore is 892,24 Euro (1740,58 S$)
Here a testreport about this telescopes http://www.scopereviews.com/page1h.html#2