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I'm surprised at the image quality. I've not measured lines/mm or anything like that, but took test images and compared them to other glass I have. Resolution is good, contrast is good, I think you'll get a solid image if you limit the light coming into the front of the lens. Flare is off the charts, if there is a bright item in front of you, it will be reflected in the middle of the image. The filter size is 67mm, I was fortunate that another lens I own uses that size and I simply tried on the different sizes I have on hand. I've ordered a UV filter to protect the front element and a metal lens hood to see if it will reduce the stray light on the image. Using the doubler you need a lot of light, but I still get nice images. Again, you are best off if you are shooting the brightest thing in front of the lens; any extra light will show up roughly in the middle of the image reducing the contrast there. Shooting at 500mm without the doubler makes everything easier, and the image is quite good. Of course the image is smaller, but it's very clear. I haven't done any serious comparisons between the doubled image and the standard one, but my impression is that it's a good unit, not degrading the image. I'm hoping I remember to update this review after I get the filter/hood, with information about how much the flare issue is reduced.Read full review
Verified purchase: Yes | Condition: New
Order another 450 lens and the aperture did not work, trashed it and saw a 500mm on line and ordered it. Works fine
Verified purchase: Yes | Condition: New
Excellent product, by reason cost benefit does not compare, and what is most important server in any camera. recommend. Produto excelente, pela razao custo beneficio nem se compara, e o que é mais importante server em qualquer camera. recomendo
I bought this for my wife's birthday, she should love it. I can not wait to give it to her at the end of the month