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
Pros: Fast / accurate auto-focus, Lightweight, Strong Construction
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. I have an existing non-Sony T/C so this is not a deal breaker for me. The 14TC has a "rim" that interferes with all the other "non-G" lenses.
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. After years of second guessing myself I finally bought the 1.4X TC. I wish I had bought it sooner. Other than the expected loss of one f-stop, there is no downside!
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. The softness and loss of contrast of 2X all but negated the advantage of the magnification. I found I could do almost as well or some times better by cropping.
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. Only the Tokina 300mm 2.8 stop down to f/4 looks a little bit sharper than the Minolta+Sony 1.4x TC.
Pros: Consistent Output, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Strong Construction
Summary: I bought this 1.4 teleconverter because I cannot afford the 12,000 dollar 500mm telephoto lens. I thought I'd try this on my 70/400 mm telephoto lens. Problem is I cant manually focus the long shots, which is why I bought this. So I have this expensive piece of gear for moon shots. For now. All the Canon and Nikon guys have them, not sure why they have them, but I'll ask next time I go out. It looks good on my camera!
Excerpt: I am a wildlife photographer. First use at Merrit Island and Vera Wetlands. Works great with 70-200 f/2.8; fast AF. With 70-400G lens no auto focus. It takes practice but works great. With focus peaking, can focus quickly in majority of situations. Use the a77; shoot in RAW and see no noticible difference in output with it on/off. Worth the price. Glad I purchased it.
Pros: Easily Interchangeable, Fast / accurate auto-focus, Strong Construction, Use 70-400 No Af