I'm struggling to find a spotting scope that rivals the clarity of what I see when looking through binoculars. Yes, I know that the two are apples vs oranges, yet I wasn't expecting image quality to be so different between the two optical instruments. I don’t live near a store that offers higher-end spotting scopes that I could go in and try out.
To explain further, I recently decided to sell my old Bushnell 10-30x 50mm spotting scope in order to enhance a recent interest in birdwatching. As I originally bought the Bushnell scope back in the 1980’s, I realize that my 21 year-old exit pupils were clearly in better shape than they are today. Even back then, zooming the scope out to 30x produced some rather dark and soft images. So I sold the scope after doing some research and eventually decided to purchase (online) Kowa’s Prominar TSN-664M scope with their 20-60x eyepiece. Frankly, I wasn’t very happy with the results at anything beyond 30x magnification. The view appeared to not only darken, but suffer from an overall lack of clarity and contrast. In fact the viewing image reminded me of shooting photos with a lens completely stopped down to it’s smallest aperture; the resultant degradation is either termed diffraction or diffusion (I’ve forgotten which). So, after reading numerous reviews I decided to try their wide 30x eyepiece instead.
I can’t say that I’m very happy with the image quality now, either. I don’t mean to pick on Kowa, but am I simply expecting too much from an optical system that is designed to view images at much higher magnifications/focal lengths than a “standard” 8x pair of binoculars? Yes, I own and use a pair of excellent Zeiss Victory SF 8x42 bins, but I’m not expecting this image quality in a 65mm spotting scope. Even my cheapo pair of Bushnell Legacy 8x42 bins have a superior overall image, versus what I’m seeing in the Kowa’s eyepiece.
Incidentally, I’ve been viewing birds at the feeder behind our house, and focusing on any nearby details like the wood grain of a fence and/or tree branches, icicles, et cetera. Nothing has been backlit, and our days have been primarily overcast but not exclusively. Opinions are most welcome.
To explain further, I recently decided to sell my old Bushnell 10-30x 50mm spotting scope in order to enhance a recent interest in birdwatching. As I originally bought the Bushnell scope back in the 1980’s, I realize that my 21 year-old exit pupils were clearly in better shape than they are today. Even back then, zooming the scope out to 30x produced some rather dark and soft images. So I sold the scope after doing some research and eventually decided to purchase (online) Kowa’s Prominar TSN-664M scope with their 20-60x eyepiece. Frankly, I wasn’t very happy with the results at anything beyond 30x magnification. The view appeared to not only darken, but suffer from an overall lack of clarity and contrast. In fact the viewing image reminded me of shooting photos with a lens completely stopped down to it’s smallest aperture; the resultant degradation is either termed diffraction or diffusion (I’ve forgotten which). So, after reading numerous reviews I decided to try their wide 30x eyepiece instead.
I can’t say that I’m very happy with the image quality now, either. I don’t mean to pick on Kowa, but am I simply expecting too much from an optical system that is designed to view images at much higher magnifications/focal lengths than a “standard” 8x pair of binoculars? Yes, I own and use a pair of excellent Zeiss Victory SF 8x42 bins, but I’m not expecting this image quality in a 65mm spotting scope. Even my cheapo pair of Bushnell Legacy 8x42 bins have a superior overall image, versus what I’m seeing in the Kowa’s eyepiece.
Incidentally, I’ve been viewing birds at the feeder behind our house, and focusing on any nearby details like the wood grain of a fence and/or tree branches, icicles, et cetera. Nothing has been backlit, and our days have been primarily overcast but not exclusively. Opinions are most welcome.