If I stacked 2 canon extension tubes of 25mm, but from diferent versions (the early EF25 and the new EF25 II), will I have any problems with autofocus on my 300mm f/4 IS lens. Do I need the 2 of the same version, so they work properly?
How about quality o the images of the 300mm f/4 IS lens + 50mm of extension tubes? Does any one have a photo exemple to show?
Need fast repply.
best regards,
Paulo Anjo
