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FORUMS ➔ Cameras, Lenses & Accessories ➔ Canon Lenses 
Thread started 27 Apr 2010 (Tuesday) 21:51
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prime suggestions and tele question

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jpbimages
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Apr 27, 2010 21:51 |  #1

using a 2x tele converter
Does it double everything?
If I use a sigma 150m f/2.8 lens, I know it will be 300mm but will it stay at 2.8, or will THAT become 5.6 as well?!

I am looking to buy something with more reach... is there really a lot of advantage of having a zoom?! I absolutely LOVE my nifty fifty... I never thought I could fall in love with a piece of glass and plastic... until I used this!




  
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nightcat
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Apr 27, 2010 22:04 |  #2

a 2X will also double any imperfections the lens has. Usually you will get better image quality with a 1.4X.




  
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jpbimages
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Apr 27, 2010 22:21 |  #3

will it close the aperture as well?




  
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DreDaze
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Apr 27, 2010 22:30 |  #4

jpbimages wrote in post #10079545 (external link)
will it close the aperture as well?

yes you'll lose 2 stops with a 2X...and 1 with a 1.4X

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jpbimages
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Apr 27, 2010 22:33 |  #5

Thanks DreDaze, I thought I had heard that somewhere....
Now the question is.... what primes to start buying up! LOL




  
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prime suggestions and tele question
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