Just wondering if it would be worth buying a 2X convertor to add to my Canon 350D, 75-300mm 1:4-5.6 lens, as I'm a keen (although new) aviation photographer who can't afford a new/second hand 100-400 lens.
Scott.
Scott53051 Mostly Lurking  14 posts Joined May 2006 Location: Walsall, UK. More info | Nov 29, 2006 14:08 | #1 Just wondering if it would be worth buying a 2X convertor to add to my Canon 350D, 75-300mm 1:4-5.6 lens, as I'm a keen (although new) aviation photographer who can't afford a new/second hand 100-400 lens. Camera Gear: Canon EOS350D. 18-55mm, 70-300mm usm, Tamrac bag. 1 right hand fore finger & shaky hands.
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In2Photos Cream of the Crop  19,813 posts Likes: 6 Joined Dec 2005 Location: Near Charlotte, NC. More info | Nov 29, 2006 14:17 | #2 A 2x convertor will yield two stops of light loss, giving you a 600mm f/11 lens. AF goes out the window so you will be manually focussing. Also, the IQ from adding the 2X will degrade. The amount od degredation depends on the lens. Lenses like the 300 f/2.8 don't show much loss, but your zoom would most likely suffer badly. I don't think it would be of great benefit. Save the money spent on the TC and get a longer lens later. Mike, The Keeper of the Archive
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Billginthekeys Billy the kid  7,359 posts Likes: 2 Joined Nov 2005 Location: Islamorada, FL More info | Nov 29, 2006 14:19 | #3 as mike said, it will be much more hurt than good. just save up the money for mabye a used sigma 50-500mm Mr. the Kid.
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Scottes Trigger Man - POTN Retired  12,842 posts Likes: 10 Joined Nov 2003 Location: A Little North Of Boston, MA, USA More info | Nov 29, 2006 15:09 | #4 What Mike said, no doubt. You can take my 100-400 L away when you pry it from my cold, dead fingers.
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OwainShaw Some of my best friends are people.  More info | Nov 29, 2006 15:33 | #5 Is that lens even compatible with teleconverters? Never mind, I really wouldn't reccomend it anyway. | New website.
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Scottes Trigger Man - POTN Retired 12,842 posts Likes: 10 Joined Nov 2003 Location: A Little North Of Boston, MA, USA More info | Nov 29, 2006 15:36 | #6 Good point - I'm pretty sure that lens wouldn't fit on a Canon 2x, but it should fit a Sigma 2x. You can take my 100-400 L away when you pry it from my cold, dead fingers.
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Thanks for the advice, I'll think I'll start saving. Camera Gear: Canon EOS350D. 18-55mm, 70-300mm usm, Tamrac bag. 1 right hand fore finger & shaky hands.
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