Cloud Break Optics

Esprit 150 專用 0.77x 減焦/平場鏡 (S20215)

Esprit 150 專用 0.77x 減焦/平場鏡 (S20215) - Main image
$325.5 $525 In stock

Category: 天文攝影配件

  • 36mm 全照明視野,相容於 APS-C 與全片幅感光元件
  • 後焦距 90mm(安裝後焦距墊片與 M48 環時為 55mm)
  • 將原生 f/7(1050mm)降至 f/5.4(810mm)
  • 與原生 f/7 相比,曝光時間減少 68%
  • 搭配全片幅相機使用時,視野為 2.54 × 1.7 度
  • 搭配 APS-C 裁切感光元件使用時,視野為 1.66 × 1.11 度
  • 包含減焦鏡、金屬旋入式鏡頭蓋、後焦距墊片及 M48 螺紋轉接環
  • 內建 2 吋濾鏡槽,可將濾鏡安裝於光路中
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Customer Reviews (4.6 / 5 · 5 reviews)

Joshua ★★★★★

I was worried about back-focus compatibility with my full frame setup, but the included spacers made it dead simple to hit 55mm. The drop from f/7 to f/5.4 cuts exposure times noticeably, and stars are sharp corner to corner on my APS-C camera.

Brian ★★★★★

The 36mm fully illuminated field covers my full-frame sensor perfectly, no vignetting at the edges. Dropping from f/7 to f/5.4 cut my sub-exposure times by about 40%, which is exactly what I needed for my narrowband setup.

Benjamin ★★★★★

Tried it last night with my APS-C camera and was thrilled to see pinpoint stars across the entire frame—the 36mm fully illuminated field really delivers. Dropping the scope from f/7 to f/5.4 cut my exposure times noticeably, and the back-focus setup with the spacer was straightforward.