I am an amateur photographer that shoots high school sports ...
7 August 2015
Summary: I am an amateur photographer that shoots high school sports for our local high school. I wanted a fix aperture lens but found that it limited my distance to do so. I purchased this in hopes of getting some of that distance back. There is no quality degradation when using this with your lens.
Summary: I use this TC with a Minolta 400/4.5 HS APO coupled with my Sony A77ii & a99 bodies. I honesty don't see any degradation in image sharpness and AF function is retained when used with this lens.
Excerpt: I HAVE ONLY HAD ONE OPPORTUNITY TO USE THIS SO FAR, TRYING TO GET A PICTURE OF EAGLE USED WITH A 300MM 2.8 PRIME AND IT WORKED GREAT NEED THE ADDITIONAL FOCAL LENGTH AS USED THE 300MM WITH OUT AND DIDNT HAVE ENOUGH FOCAL LENGTH TO PULL IT IN, SO FAR i AM PLEASED
Summary: I was told before I bought this that it would not work on non-G series lenses, in 20 years of using Minolta hardware I have never encountered this so I was skeptical - but I can confirm it is true. None of my Minolta or Sony "non-G" lenses will work with this T/C.
Summary: I have owned the Sony 300mm f/2.8 G lens for a long time. I also had the Sony 2X TC but had mixed feelings about the results I was getting. The 2X caused loss of contrast and in low light my A900 would have difficulty finding auto-focus.
No downside other than the expected loss of 1 f-stop.
David De Bar, Amazon
20 February 2014
Summary: I use this TC on my Sony 300mm f/2.8 lens mounted on an A900 camera. I bought the 300mm lens at a good price from a photographer who needed to raise money quickly. I bought her Sony 2X teleconverter at the same time. I loved the 300m lens but was consistently disappointed when I used the 2X TC.
Excerpt: I use the Sony 1.4x with Minolta 200mm 2.8 HS APO G and A900. I don't see optical quality degrade much, only a little lower contrast at wide open, but it is still fully useable. Stop down a little to f/4.5 regain most the contrast back. The pictures look about the same compare to Sigma 100-300mm 4.