Big aperture and small aperture lens difference
The Sony lens takes diffraction pretty hard while a Nikon 28-300mm I also own is less pronounced. Diffraction becomes a problem around f/22 and the lens will become increasingly less sharp. It’s really your dedication to stargazing that is most important… In my eyes, it’s much better to have 6-inch telescope under the stars twice a week than 14-inch stored in your house because the effort of setting it up prevents you from using it often. What is certain for all lenses is that as the aperture gets smaller (bigger f-number) beyond f/13, the worse the lens performs in terms of sharpness.
#Big aperture and small aperture lens difference upgrade
When you upgrade your telescope for one with a bigger aperture, you may expect the images you see through your scope to be much clearer and sharper. In comparison with a moderately sized telescope, say 60mm, said telescope harvest 70 times more light than your naked eye! Now you might be surprised that your eye pupils have an aperture of 7mm and are doing exactly this exact job as you are reading this article.
In a refracting telescope, the light goes from the main lens (aperture) directly to the eyepiece lens. In a reflecting telescope, the light is then passed on to the secondary mirrors, then to the focal point. The larger the aperture, the more light is collected, which results in a greater image resolution. Light is collected through the telescope’s aperture and sent toward the next optical piece inside the scope.