Pros and Cons of a teleconverter

9 years 7 months ago #401237 by Chris Ly
Can someone share these with me please. 


Thank you

Chris


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9 years 7 months ago #401383 by garyrhook
I can hear it now.

With a TC you lose some portions of a stop of light! The 1.4 costs you 1/3 stop, the 1.7 is 2/3 stop, the 2 is a full stop.

They are an inexpensive way to extend the focal length of a lens. I have considered the TC2, but I'll probably end up getting the Tamron 150-600 for wildlife and lunar work, at some point.

If in doubt, rent one and see what you think.


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9 years 7 months ago #401442 by Andrew AG
I own a 1.4X and a 2X is absolutely correct.  I find that I use my 1.4X most of the time, you lose to much performance with the 2X.  Now if you are shooting in bright daylight, then it really doesn't make any difference. 


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7 years 9 months ago #486633 by Stic
Probably a bit late to chime in now, but...

I have a Tamron 2x converter (in off white to match my 100-400L) which I picked up secondhand for a ridiculously low price...

I think ALL of my moon shots are taken with it...

No good for moving subjects (focus slow and only in live view), but the reach...

On my crops, it gives me the equivalent of 1280mm at the long end...


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7 years 8 months ago #489701 by Finn

Andrew AG wrote: I own a 1.4X and a 2X is absolutely correct.  I find that I use my 1.4X most of the time, you lose to much performance with the 2X.  Now if you are shooting in bright daylight, then it really doesn't make any difference. 


Funny how that works.  I missed that memo when I bought my 2x too! It's good to use during day light hours on birds, when you don't mind sacrificing a couple stops! 


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7 years 8 months ago #489962 by effron

Stic wrote: P.

On my crops, it gives me the equivalent of 1280mm at the long end...


It will NOT give you a 1280mm equivalent, it will double the image size on a crop sensor or a full frame sensor. If you use the same lens with TC on both sized sensors, and shoot say a small stone, the stone will be the EXACT same size on both sensors. You will get an auto crop on the crop camera, of course...

Why so serious?
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7 years 8 months ago #489964 by Screamin Scott
What Ernest is saying is that it gives you the same Angle of View as a longer lens but it doesn't change the focal length of the lens it is being used on

Scott Ditzel Photography

www.flickr.com/photos/screaminscott/

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7 years 8 months ago #489989 by Stic
Hence, why I said 'equivalent'...

...and not, "it makes my 100-400 a 200-800"...


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7 years 6 months ago #500289 by emailamir
Pro:

Your subject will look closer

Con:

It may give some noise to the image


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7 years 6 months ago #500410 by Shadowfixer1

emailamir wrote: Pro:

Your subject will look closer

Con:

It may give some noise to the image

Noise? The only reason you would get more noise is because there is not enough light. The image most likely won't be as sharp as without a TC but noise, no, if light is good. 
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