Similar to the above question, I have a refracting telescope with an objective lens focal length f=200 mm. I have three possible eyepieces I can use with this telescope, having focal lengths of 9 mm, 25mm and 50 mm. I want to look at a cluster of stars which are well spread apart from each other on the sky. Which eyepiece would I best use for this? O A. 9 mm O B. 25 mm O C. 50 mm O D. It doesn't matter which one

Similar to the above question, I have a refracting telescope with an objective lens focal length f=200 mm. I have three possible eyepieces I can use with this telescope, having focal lengths of 9 mm, 25mm and 50 mm. I want to look at a cluster of stars which are well spread apart from each other on the sky. Which eyepiece would I best use for this? O A. 9 mm O B. 25 mm O C. 50 mm O D. It doesn't matter which one