ThaiExcite
88/41 Kanlapapruek Road, Bangkae, Bangkae, 10160, Bangkok, ประเทศไทย
ติดต่อสอบถาม: 081-239-3299
อีเมล์: info@thaiexcite.com
URL: http://www.thaiexcite.com/Sharpstar-2-Triplet-0.95x-Reducer-Coma-Corrector-for-f-3-f-6-Newtonian-Reflectors-with-M48-Thread.html
Sharpstar 2" Triplet 0.95x Reducer / Coma Corrector for f/3-f/6 Newtonian Reflectors with M48 Thread
รายละเอียด
รายละเอียด
Sharpstar 2" Triplet 0.95x Reducer / Coma Corrector for f/3-f/6 Newtonian Reflectors with M48 Thread
Sharpstar 2" 0.95× coma corrector can be applied to most marketable Newtonian reflective astrographs. It’s of high quality and easy to use. Sharpstar 2" 0.95× coma corrector is designed for APS-C imaging circles(28mm), suitable for Newtonian reflectors with focal ratio between f/3 and f/6, and aperture size from 150mm to 600mm. The reduction factor is 0.95×, thus it can reduce the original f/4, f/5 and f/6 respectively to f/3.8, f/4.75 and f/5.7, effectively shortening the exposure time. Besides, it can improve the star shapes. The diameter of stars in the center of the field can be limited within 10um.
Specifications
Reduction factor：0.95×
Image circle：44mm(maximum), 28mm(optimal)
Lens：triplet structure
Outer diameter：50.8mm(2")
Back focus：56mm(starting from the field-stop-ring to the focal plane)
Length：79.7mm
Coating：full-surface multi-layer coatings
Weight：0.22kg
Schematics
Astrophotos
(Click for high resolution version)
(Click for high resolution version)
(Click for high resolution version)