Scientific digital camera manufacturer Andor Technology's current order book is at a record level. However, while the systems division has delivered greater unit sale values, margins have been hit by "reduced manufactured content". Andor also remains exposed to the volatility of the currency markets and has been affected by the appreciation of the pound and Swiss franc. "Our software strategy and our expanded channels to market are having a positive impact on performance," the group says.Mineral exploration and development group Obtala Resources has agreed to acquire 50% of Sub-Saharan Africa-focused miner Greenhills Resources for a $4m staggered payment. Through the acquisition, Obtala receives a 37% interest in the Mokopane Tin Project in South Africa."The market fundamentals for tin are currently extremely favourable and looking forward I believe this investment into Greenhills' assets and its highly professional management team, will be transformational for Obtala and its shareholders," says Obtala chairman Frank Scolaro.