Hello,
I was thinking about getting a Sigma 1.4x DG EX APO Teleconverter but I was wondering...
Is the TC worth buying ? I read the reviews on this forum and it looks quite good but... in a more practical way :
Is it worth putting it on a 500mm ? I got a 80ED telescope lens, used in a prime focus setup. It gives very good IQ, so is it better to crop or to use the TC (and crop even more?
).
As a consequence, does this TC work with manual focus lens ? Because my 80ED is connected through a T2.
Thank you !