Reviews and Problems with Kenko 420-800mm f/8.3-16
Showing 1-10 of 10
Price vs Quality
17 March 2012
Summary: First I should note that I purchased this lens used for around $30. At this price this was a lens I could afford to gamble on. This price will factor into my review later. What this lens amounts to is an attempt to utilize a telescope (think astronomy) for a camera lens. There is no aperture and the focus ring is very long (at least four full rotations from end to end). General build quality is sturdy and should be reliable.
Summary: I own this in the Canon EOS mount.. they are in fact all the same, just ships with a different T-mount adapter, and the 420-1600 just ships with a 2x teleconverter. This is a very light weight lens, especially for its focal length, it has no aperture blades, it's completely empty on the inside, its like an old style hand telescope.
Excerpt: This lens for the money is a worthwhile lens.I do not have a great need for 400-800 but for the money you cannot go wrong.As other evals stated, you need to shoot manual and your f/stop is fixed.You will need to use your shutter speed and ISO for light configuration.It takes good pictures but focus is not easy and takes some time to get used to.
Excerpt: I have a T-mount for my Telescope. When I want to spot rare wildlife or things that I know are going to be at a great distance (mostly wintering ducks in a few local bays) I lug this 25lb contraption out... Its not easy, but its 1250mm focal length has been great to document wildlife. I got this lens because 800mm and VERY Light. Its a compromise. You definitely need a tripod and I recommend using live-view to try to get a sharp focus.
Excerpt: There's a problem with the sentence: "Aperture is fixed and the Kenco Vari-zoom lens should be used with cameras set to a shutter priority mode": with a fixed aperture, the camera should be on APERTURE priority AI (or manual...) mode.
Excerpt: I have a Canon eos Rebel G, I used my new lense and got my pictures back. They were alittle fuzzy with a couple of pictures, but, I didn't use my tripod, I believe that's why they turned out that way. Next time I'll use my tripod and remote. The T-mount that came with it, the red dot is a little small and hard to see, so if you don't line it up right, it won't lock up properly, but over all, I'm pretty happy with it.
Pros: Durable, Lightweight, Rugged, Strong Construction