Upload & Sell: On
Thanks for the welcome Yeah ... I suppose the best way is to play with it and determine fit for my own needs. Not being a professional, though, some nuances may be lost on me.. such as the manual focussing ring, which I never use (but considering the amount of discussion on its absence, or difficulty to use, on the 1.8 and its presence on the 1.4, I am beginning to wonder whether I should).
That's just it, though - if we get into a dollars conversation, it's a losing game from the start. Since, after switching to a 6D,...Show more →
IMHO, keep the 1.8 and send the 1.4 back; get a refund. With Canon recently releasing their 24/28/35 IS primes I'd guess a 50/85 aren't far behind and these new lenses seem to have pretty good IQ.
As Jim stated, their; 1.4 vs. 1.8, IQ isn't much different. I've had my 1.4 since early 2000 and had NO issues, but some actually have had it's USM and/or AF fail...neither issue seems to affect the 1.8; at least it's not reported. If a slower lens is okay; usable, then check out the 50 f2.5 Macro, it is a sharper lens...
However, to get better IQ you have to get L glass or an expensive 3rd party lens. As for DXO, no comment, I don't use their rating system, understand it either...so I don't pay it much attention.
When I look to get a new lens I usually go to 'The Digital Picture' website and a few others for reviews/images, I also browse through images and text here on FM. Up above in the menu is an option titled EXIF Gallery, check it out, you can use it to search FM for images from a body, lens or combination of, there are more search options as well.
And, one last thing...your 50 1.8 on a crop body had the same FOV as an 85mm lens. I'd be looking seriously at Canon's 85 f1.8, it is fast, killer sharp, one of Canon's true non-L gems...and I highly recommend it.