In the intense circumstance the place an object can be an infinite distance away, S1 = ∞, S2 = file and M = −file/∞ = 0, indicating that the thing might be imaged to only one stage while in the focal plane. ⑪ 구매회원이 상품 수령 후 교환이나 환불을 https://qoo.tn/AQLEFS