Tele converters

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kata eos

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Hi...wondering if i could have some advice on 2x Teleconverters,are they worth investing in?
Was thinking of getting one to fit onto my 75-300 lens as a "stop gap" measure(for if i see something that the 300mm won't quite reach),i know i will lose some stops ,i would like to get either a 50-500 or a 150-500 lens..but they are expensive for me at the moment.
thanks :-)
 
If it's an EF-s lens it wont fit!
 
75 - 300 lenes are EF not EFS! A genuine Canon EF extender won't work with this lens, so you will need to look at a kenko converter. If you go for 1.4 x coverter you will lose 1 stop and possubly AF.
 
mortimerhill said:
75 - 300 lenes are EF not EFS! A genuine Canon EF extender won't work with this lens, so you will need to look at a kenko converter. If you go for 1.4 x coverter you will lose 1 stop and possubly AF.
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A x2 converter is too much; you will lose 2 stops, so your max aperture is now f11. this will make focusing difficult and camera shake will be major problem as you will need to use slower shutter speeds
 
The 75-300 is generally recognised as one of Canon's worst for image quality. Adding a 2x TC will magnify all the bad bits to make the image terrible. Add that to the fact that your lens would now be f11 and manual-focus only and you'd soon find yourself
 
Thanks for info Frank :-)...If the 75-300 is recognised as the worst for image quality,that might explain why a picture i had taken of a deer a while back looked utterly rubbish..the lens came with the camera,it was a twin lens kit...only wish i had known of this forum before i bought it.oh well lol!:-)
 
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