teleconverters on telephoto lenses

Discussion in 'Adapted Lenses' started by pellicle, Feb 21, 2014.

  1. pellicle

    pellicle Mu-43 Hall of Famer

    Feb 10, 2010
    Southport, OzTrailEYa

    having had FD and OM 300mm lenses for a while I've often been curious as to exactly what benefit a x2 teleconverter brings to using on the m4/3 cameras (which are essentially a x2 anyway). I thought I'd put down some money and bought a Canon FD x2-A teleconverter lens and try it on my FD300mm f4

    I put this on my blog if anyone is interested.

    there are no ads on my blog, nor is it 'monetised' so don't worry about it being a 'stick-up'

    Hope that helps anyone who may have been thinking about this themselves

  2. Rasmus

    Rasmus Mu-43 Top Veteran Subscribing Member

    Nov 16, 2013
    Stockholm, Sweden.
    I believe you basically proved to yourself that teleconverters are only really worth it if you have the fastest lenses money can buy. As soon as maximum aperture becomes f/8 it tends to become rather less useful, especially since you'll need to stop down a bit for improved sharpness. Your 2x converter would likely be far more useful on a 300/2.8. I have a 2x converter with my 500 f/4 and I practically never get sharp images with 1000/f/8. An 1.4 converter would give me 700/5.6, I believe that could be far more useful.