paulja Posted March 11, 2012 Share #1 Â Posted March 11, 2012 Advertisement (gone after registration) hi everyone ,,i have a 400 f2.8 non modular with a 2x apo converter ,,i seems that with the converter im losing sharpness ,,im noticing that a pic taken without the 2x then blown up looks sharper ,, should this be,,also im using a canon 60d and fotodiox mount...thanks....paul Link to post Share on other sites More sharing options...
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pico Posted March 11, 2012 Share #2 Â Posted March 11, 2012 I have never found a tele-extender that did NOT diminish sharpness. (I am not speaking of the modular focal length lenses that share at least one major section.) Link to post Share on other sites More sharing options...
jaapv Posted March 11, 2012 Share #3 Â Posted March 11, 2012 That is basically correct. However with this type of combo on film I never found a significant difference. On digital, well it really depends on the amount of pixelpeeping. At 200% - sure - on print - not really. The Apo 1.4x can be said not to deteriorate the image. I even used both extenders stacked on the Apo 280/4.0 and could not complain about the results. Link to post Share on other sites More sharing options...
darylgo Posted March 12, 2012 Share #4 Â Posted March 12, 2012 From a very reliable source I was told that a 2x converter image at 100% should be superior to a same-lens-without-converter image at 200%. I tested this one time and it was true for my lens/converter combination. By superior I mean sharper (higher resoluton). Link to post Share on other sites More sharing options...
jamesk8752 Posted March 13, 2012 Share #5 Â Posted March 13, 2012 From a very reliable source I was told that a 2x converter image at 100% should be superior to a same-lens-without-converter image at 200%. I tested this one time and it was true for my lens/converter combination. By superior I mean sharper (higher resoluton). Â Perhaps - it very much depends on the quality of both the lens and the converter. A lens with CA or other faults will simply present a magnified version of the flaws. A poor converter (and most 2x converters are in this class) will introduce flaws of its own. Â In my experience, a top quality lens and a top quality converter will indeed produce a better image than a 2x blowup of the original image; however, in most cases when using inferior glass the blowup will give the better image. YMMV, of course. Â Regards, Jim Link to post Share on other sites More sharing options...
pico Posted March 13, 2012 Share #6 Â Posted March 13, 2012 [...]Remember that Leica long lenses aren't image stabilised [...] Â An aside - with some lenses and cameras' image stabilization does not work when the unit is already stable, such as well held (rare case), or on a tripod. In fact, if on a tripod stabilization can _add_ shake. Link to post Share on other sites More sharing options...
jaapv Posted March 13, 2012 Share #7 Â Posted March 13, 2012 Advertisement (gone after registration) That is why it can be switched off - or set to a "tripod"setting. Link to post Share on other sites More sharing options...
paulja Posted March 13, 2012 Author Share #8 Â Posted March 13, 2012 thanks for the replys ....paul Link to post Share on other sites More sharing options...
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