So, I ran a test on my new 50 comparing it to my old AI'd one. It didn't really perform as well and it sort of makes me hesitant to keep it. This would be my first lens purchase after my kit lens with my d7k. For the money I want to be really sure about the purchase and I find myself on the fence. I have been paying my dues learning my camera as time permits since last April. Decided on the 50 since one day I want to upgrade to full frame since I loved FX back in the day of film and have been missing that since. Anyhow, went 1.4g because I liked my inherited one so much. I had a bit of a learning curve wrapping my head around working with autofocus and low light and wide open aps. After some frustration I finally realized that shooting close up, wide open on a moving subject such as a toddler, I really had to use manual focus or af-s single point. I just couldn't get the AF-A 39 point AF to cut it. It never picked the right focus point. So, if this sounds right let me know? I I know how slim the DOF is and how hard that is too work with. But that aside, it bugs me how this test came out. I feel like I can't trust the autofocus, and worry about a back focus issue with the new lens or maybe camera. Help me interpret my test please and advise me? I feel like colors are even better in my old lens.
Long story short... If I don't love it, I should return it IMO. I will be shooting mostly my toddler as I learn photography more. Maybe a zoom would be better? I think my kit 18-105 was great just couldn't open it enough. Or maybe I would be better off with the 50 1.8 since it is cheaper I would feel better about it?
I also have half a mind just keep my old one for when I want to use a 50, and save my money for my first fx camera?
Would love feedback on my test and also on recs for my next steps such as lens or camera suggestions so I can get my goals in order.
I tested against my kit at a higher f stop since I can't open my kit lens as much. It seems to back focus to so I dont know if this indicates a camera issue or what. I will say that I never had a problem with my kit. I only started pixel peeping recently I guess.