Updated from 12:55 p.m. EST

Shares of

National Instruments

(NATI) - Get Report

were among technology's losers Friday, falling 8.9% after the company lowered its first-quarter earnings and sales outlook.

The maker of measurement and automation products now expects earnings of 12 cents a share, down from previous guidance of 16 cents to 20 cents a share. Sales are now expected to fall by 5% to $130 million on a sequential basis instead of being flat with fourth-quarter sales of $137 million. Analysts polled by Thomson First Call had been expecting earnings of 18 cents a share on sales of $136.6 million. National Instruments blamed the shortfall on a reduction in large system-level orders and a decline in instrument control sales. Shares traded down $2.41 to $24.64.

Ipix

(IPIX)

fell 11% after the company posted fourth-quarter results that disappointed investors. Excluding discontinued operations, the supplier of imaging technologies posted a loss of $3.7 million, or 18 cents a share, on sales of $909,000. A year ago, the company posted a loss of $1.8 million, or 28 cents a share, on sales of $499,000. Last year's earnings included a $1.45 million tax benefit. Shares traded down 32 cents to $2.58.

Shares of

Viisage Technology

( VISG) fell 12.8% after the company delayed the filing of its annual report with the

Securities and Exchange Commission

. Viisage said that the company and its auditors need more time to review pending litigation involving the company and to assess the impact, if any, on its financial statements for the year ended December 2004. As a result of the filing delay, Viisage expects to receive a notice from

Nasdaq

market officials for noncompliance with continued listing requirements. Shares traded down 43 cents to $2.94.

Ciena

(CIEN) - Get Report

traded actively after the company said

Broadwing

( BWNG) would pay it $35 million as part of a settlement related to a patent infringement suit between the two companies. Under the terms of the settlement, Broadwing will pay Ciena $35 million in three equal installments. Of the total payment, Broadwing can use $33 million as credit toward the purchase of Ciena equipment and services over the next three and a half years. Shares of Ciena traded down 2 cents to $1.70, while Broadwing ended the day unchanged at $4.14.

Shares of

Taser International

(TASR)

fell 13.2% after the company warned that first-quarter sales would fall well short of expectations. The maker of stun guns said that it expects sales of $10 million. Analysts had been expecting sales of $13.6 million. The company blamed the shortfall on negative publicity during the first quarter, which caused a "temporary disruption in our sales pipeline," it said, and created "a significant disruption in the flow of new business in the first quarter." Shares traded down $1.58 to $10.42.

Other technology movers included

Intel

(INTC) - Get Report

, down 22 cents to $23.01;

Microsoft

(MSFT) - Get Report

, down 5 cents to $24.12;

Cisco Systems

(CSCO) - Get Report

, down 19 cents to $17.70;

Oracle

(ORCL) - Get Report

, up 5 cents to $12.53;

Sirius Satellite Radio

(SIRI) - Get Report

, down 6 cents to $5.56;

Red Hat

( RHAT), up $1.25 to $12.16; and

Lucent Technologies

( LU), down 4 cents to $2.71.