I do think there may be user error in indoor shots especially at f4 because my ball head was loose, and I tightened the hex screw before I took my outside shots (hex tool was in my car). so in essence, it was on my tripod but it was somewhat loose so I still had to hold the camera steady while taking the indoor shots, especially to keep the frame uniform throughout.
60-250 by itself @ 250mm 100% crops
60-250 f4 1/250 iso 800
Attachment 388833
60-250 f5 1/250 iso 1600
Attachment 388834
60-250 f7.1 1/250 iso 3200
Attachment 388835
60-250 f8 1/200 iso 3200
Attachment 388836
60-250 f10 1/125 iso 3200
Attachment 388837
60-250 f11 1/100 iso 3200
Attachment 388838
60-250 f13 1/80 iso 3200
Attachment 388839
So far I'm happy with the AFA 1.7x. I will retest my 60-250 again, with and without the AFA 1.7x, just because I will be more careful and mindful of settings on my 2nd test. I did use the AFA 1.7x with my A 50mm F1.2 and was happy with the rendering and results there just from in camera peeping (resulting in 85mm f2.8). I deleted those test photos, but maybe I will retest and post that combination. The AFA 1.7x is spot on in focusing especially when you double check it using live view zoomed in, I finally get why on some lenses you have to get it within focusing range to enable the AFA to focus the rest of the way. My 60-250mm motor died, so all focusing on that without the AFA is manual. The 150-450 definitely appears better at rendering small details, as I would expect regarding its cost; I'm going to shoot with it constantly for the next year partly because I just found the 3 instances of the lens coming apart as reported in this forum and want to make sure if mine does that that it is still under warranty (I do have a later serial number than the reported mishaps). Last, I've never went birding before, but I'm definitely going to start especially now I have this lens, and I hear NJ is good real estate for birding.
Last edited by angelo9978; 04-16-2018 at 06:50 PM.