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<blockquote data-quote="stmv" data-source="post: 130504" data-attributes="member: 10038">I personally find that when I go beyound 1.5 in tele converters, I am less satisfied with the results, I know that the light is reduced by a fstop, but darn, I swear my sharpness is reduced too (even on tripod), so, I prefer to stay away from the teleconvertors, Although I hear that the 1.4 matched with the Nikkor 300mm is like a dream (so,, I'll be picking one of those up).but, would find it hard to believe that the zoom would be better, unless for some reason that particular sigma prime was a dog, which I doupt. as far as aperature, comes down to trade-offs, you are already giving up an fstop, and if you are forced to step down, and have to boost the ISO up too much introducing noise, you might be better off with the shallower fstop and lower ISO, depends on your camera.Personally, I like to hang between F8-F11 on the majority of my shots, unless,, 1. I intentionally want the shallow dofor2. I am trying to reduce light to the max for the dreamy water effects and or light trails.</blockquote>

[QUOTE="stmv, post: 130504, member: 10038"] I personally find that when I go beyound 1.5 in tele converters, I am less satisfied with the results, I know that the light is reduced by a fstop, but darn, I swear my sharpness is reduced too (even on tripod), so, I prefer to stay away from the teleconvertors, Although I hear that the 1.4 matched with the Nikkor 300mm is like a dream (so,, I'll be picking one of those up). but, would find it hard to believe that the zoom would be better, unless for some reason that particular sigma prime was a dog, which I doupt. as far as aperature, comes down to trade-offs, you are already giving up an fstop, and if you are forced to step down, and have to boost the ISO up too much introducing noise, you might be better off with the shallower fstop and lower ISO, depends on your camera. Personally, I like to hang between F8-F11 on the majority of my shots, unless,, 1. I intentionally want the shallow dof or 2. I am trying to reduce light to the max for the dreamy water effects and or light trails. [/QUOTE]

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