ThaiExcite
88/41 Kanlapapruek Road, Bangkae, Bangkae, 10160, Bangkok, ประเทศไทย
ติดต่อสอบถาม: 081-239-3299
อีเมล์: info@thaiexcite.com
URL: http://www.thaiexcite.com/William-Optics-Diffraction-Spikes-Bahtinov-Focusing-Mask-for-Telescopes-Dew-Shield-Diameter-From-75mm-110mm.html
William Optics Diffraction Spikes Bahtinov Focusing Mask for Telescopes Dew Shield Diameter From 75mm -110mm
It’s about 3 times brighter than traditional metal type.