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<blockquote data-quote="hark" data-source="post: 724312" data-attributes="member: 13196">Thanks, Andy. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" /> I wound up getting 2 to compare. The first pre-owned TC was used in the hawk image above with the purple sky. I'm not sure why there was such a color shift, but every photo taken from that angle has purple sky. Plus it seems to front focus quite a bit. So I also ordered a refurbished one for comparison (yay, blue sky), but first I need to perform the AF tuning to before determining which one will work best for me. According to reviews, the 1.7x TC hasn't performed as well as the 1.4x. But I am surprised I'm getting these results which are definitely better than I anticipated. :encouragement:Since I'm not able to hand hold a super zoom (tendonitis in my right hand), I thought I'd have to settle for the focal length that my 300mm f/4 and 1.4x TC provided - and that is 420mm f/5.6. This 1.7x provides a focal length of 500mm f/6.7 (such an unusual aperture) but the aperture is larger than I anticipated. And that is great!</blockquote>

[QUOTE="hark, post: 724312, member: 13196"] Thanks, Andy. :) I wound up getting 2 to compare. The first pre-owned TC was used in the hawk image above with the purple sky. I'm not sure why there was such a color shift, but every photo taken from that angle has purple sky. Plus it seems to front focus quite a bit. So I also ordered a refurbished one for comparison (yay, blue sky), but first I need to perform the AF tuning to before determining which one will work best for me. According to reviews, the 1.7x TC hasn't performed as well as the 1.4x. But I am surprised I'm getting these results which are definitely better than I anticipated. :encouragement: Since I'm not able to hand hold a super zoom (tendonitis in my right hand), I thought I'd have to settle for the focal length that my 300mm f/4 and 1.4x TC provided - and that is 420mm f/5.6. This 1.7x provides a focal length of 500mm f/6.7 (such an unusual aperture) but the aperture is larger than I anticipated. And that is great! [/QUOTE]

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