tele converter advice for D750...thanks
Jun 14, 2016 08:55:17 #
Jun 14, 2016 08:59:00 #
crbuckjr wrote:
Thanks to all......looks like I was barking up the wrong tree......thanks
Some of the big pluses of the forum are food for thought and some good links to follow up,and often some first hand experiences!
Jun 14, 2016 09:00:46 #
Jun 14, 2016 12:36:32 #
amfoto1
Loc: San Jose, Calif. USA
Save your money and buy a longer focal length lens instead.
Used to be, to get longer than 300mm cost a fortune. Now there are some relatively affordable choices up to 600mm. Sigma and Tamron offer 150-600mm lenses for around $1000. Now discontinued, but widely available for about half that are several Sigma such as 50-500mm, 120-400mm and 150-500mm.
Not true. A high quality TC used conservatively with a high quality lens can do a pretty good job. I use Canon gear, so can't help the original poster... but I use Canon 1.4X II quite a bit with 300/4, 300/2.8 and 500/4 primes... less often but occasionally with 135/2, 70-200/4 and 70-200/2.8. A mild TC such as the 1.4X shows little loss of image quality with high quality prime lenses. There's more loss of IQ with the zooms, but images are still usable. Especially, lower quality, general consumer grade zooms that already compromise are only made worse when you magnify their flaws and shortcomings with added magnification. I also use Canon 2X II TC, but almost exclusively with 300/2.8, only occasionally with 500/4 lens... never with any zoom.
True! A longer focal length lens is nearly always better than most combos of shorter lenses with TCs. Of course, it's likely more expensive, too. But there are no "free lunches" when it comes to optics.
Used to be, to get longer than 300mm cost a fortune. Now there are some relatively affordable choices up to 600mm. Sigma and Tamron offer 150-600mm lenses for around $1000. Now discontinued, but widely available for about half that are several Sigma such as 50-500mm, 120-400mm and 150-500mm.
Quote:
Teleconverters are a waste of money, unless you want a degraded image. A longer lens would be better.
Not true. A high quality TC used conservatively with a high quality lens can do a pretty good job. I use Canon gear, so can't help the original poster... but I use Canon 1.4X II quite a bit with 300/4, 300/2.8 and 500/4 primes... less often but occasionally with 135/2, 70-200/4 and 70-200/2.8. A mild TC such as the 1.4X shows little loss of image quality with high quality prime lenses. There's more loss of IQ with the zooms, but images are still usable. Especially, lower quality, general consumer grade zooms that already compromise are only made worse when you magnify their flaws and shortcomings with added magnification. I also use Canon 2X II TC, but almost exclusively with 300/2.8, only occasionally with 500/4 lens... never with any zoom.
Quote:
Teleconverters are a waste of money, unless you want a degraded image. A longer lens would be better.
True! A longer focal length lens is nearly always better than most combos of shorter lenses with TCs. Of course, it's likely more expensive, too. But there are no "free lunches" when it comes to optics.
Jun 14, 2016 17:45:43 #
crbuckjr wrote:
can you tell me a bit more about applying pixel enlargement techniques? thanks
I use the default Adobe Bicubic smoother for enlargement ( in Adobe programs like Elements) and do it in increments of 10% or less ( of the total image pixels) at a time and consider resharpening at the end.
Jun 14, 2016 18:15:00 #
imagemeister wrote:
I use the default Adobe Bicubic smoother for enlargement ( in Adobe programs like Elements) and do it in increments of 10% or less ( of the total image pixels) at a time and consider resharpening at the end.
BTW, This is also the way I reduce the pixel size - only use "bicubic sharper for reduction" - and do it by 50% at a time ......
Jun 14, 2016 22:15:13 #
crbuckjr wrote:
for my D750 I have a Nikor 28-300 zoom. I am thinking about getting a teleconverter to use in taking, for example, pictures of loons and eagles on our lake. Of course, I'd like all the automatic features (focusing, etc.) to continue to work. Obviously, I am attempting to avoid purchasing an expensive longer lens that I wouldn't use that oftern.
Any advice would be appreciated. Thanks, Chuck
Any advice would be appreciated. Thanks, Chuck
Don't do it - even if you find one that will physically work (and not ruin your lens or itself), the quality with that lens will be pretty awful, and the viewfinder will be dark, and autofocus will not work.
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