壓歲錢先留著！蘋果傳推8款「平價新品」最低不到1000元 Horn antenna
Standard Gain Horn Antenna
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Standard gain horn antennas are used as calibration devices that measure the gain of other antennas.
These antennas are made up of a combination of a Waveguide to Coax Adapter and Standard Gain Horn with Waveguide Input. It is a kind of simple combination but with great care and attention to create an antenna with accurate and suitable specs.
FT-RF Standard gain horn antenna product series includes waveguide sizes WR28, WR42, WR51, WR62, WR75, WR90, WR112, WR137, WR159, WR187, WR229, WR284 and WR340, WR430, WR510, WR650, WR770, WR975, WR1150, WR1500, WR1800, WR2100, WR2300, with broadband waveguide horn antennas have frequency capabilities ranging from 320Mhz to 40 GHz depending on type and style. with the gain of 10dBi, 15dBi, 20dBi and 25dBi.
Standard Gain Horn Antenna Applications:
- - Antenna measurement
- - Radar Detection System
- - Wireless Communication
- - Spectrum Monitoring
- - Electromagnetic interference Testing (EMI test)
Sony推出首款800mm焦段變焦鏡頭 限時註冊贈好禮即享券
Sony發表E接環全片幅鏡頭FE 400-800mm F6.3-8 G OSS超望遠變焦鏡頭 (型號：SEL400800G)，為Sony首款800mm焦段變焦鏡頭；承襲G系列鏡頭的柔美散景，並融合多項光學技術，加上高效精確的對焦及出色靈活的操控，適合運動、生態、航空攝影等領域的專業攝影師使用。
FE 400-800mm F6.3-8 G OSS 超望遠變焦鏡頭，含腳架座重量為2475公克，輕量化設計提高便攜性和機動性，而內變焦設計讓整體長度在變換焦段的時候保持不變，鏡頭重心也可維持在幾乎相同位置，方便長時間追蹤與拍攝。
全新推出的FE 400-800mm F6.3-8 G OSS鏡頭內建光學影像穩定系統，不僅支援積極模式(Active mode)且可依據追蹤主體移動模式切換MODE 1~3以應用於不同拍攝情境，確保捕捉清晰的影像；其他還包括了可於自動對焦模式下轉動對焦環以迅速切換為手動對焦的「全時手動對焦功能(DMF)」、線性響應手動對焦及對焦範圍限制器等設計，都讓專業攝影師能更直覺操作、支援多元的拍攝需求；此外，強度更優化的固定鏡頭支架與可方便調整濾鏡的新款遮光罩，也提升整體鏡頭使用體驗。
來自: https://www.chinatimes.com/realtimenews/20250227005408-260412
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