My experience mirrors David’s. In fact, I sold the 2x converter for that reason.
Gitzo tripod, Markins M20, Wimberley sidekick, all locked down tight and still…
Are the images good? Yes. But you do notice they’re not *quite* as sharp and I find it annoying! Maybe I’m too much of a pixel peeper though Akos – I know Art Morris happily uses a 2x when he needs the reach.
Also, bear in mind that Dave is the sort of lucky bugger that can get his hands on an 800 when needs the reach… 
Al
On 26 November 2010 08:22, David Stowe
> Akos > The 500mm is such a sharp lens that you get used to a certain level of > quality. With a 1.4x I don’t really notice the difference, whereas with a 2x > I do notice a difference in quality. Nothing to do with technique. I also > have reasonable shots with stacked converters but you could never say they > are as sharp as the 500mm by itself. > Obviously its easy to make these images look sharp when resizing for web > forums and adding sharpening etc, but at 100% i personally find a > difference. > Cheers > Dave > > On 26/11/2010, at 7:43 AM, Ákos Lumnitzer wrote: > > David > > I have to disagree about the Canon EF 2x. Maybe you have a bad copy or I > have a fabulous one. Under the right circumstances and using solid technique > I most certainly get more than good enough quality images and I don’t even > use a 500/4L yet. Even stacking a 1.4x and a 2x I can get very good results > (hand holding!). Just food for thought. I admit, I am no pixel peeper, but > certainly have a very good grasp of this funny thing called photography and > professional nature photographers world-wide like what I am capable of > producing. What my point is that there are many factors to consider with > converters; light, lens, technique, converter quality (individuals most > likely differ) and so on. I won’t even touch the subject of cropping > (excessively) as many now do because they have 15+ megapixel cameras. > > respectfully yours > > Akos > (just an amateur in many worlds) > > ============================== To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line) to: birding-aus-request@vicnet.net.au
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