Thought I'd post a few examples straight from camera (jpgs from RAWs, no editing or cropping or artistic intent!) to illustrate the problems I'm having with BEAF. It'll be interesting to hear from folks whether my expectations for BEAF are in the right ballpark, but my opinion is that BEAF is not working as well as it used to with these sort of shots that I've been taking for years.
First three are with the 200-600 a few days ago. Second three are with the 100-400 today in slightly worse light. The 200-600 was terrible with BEAF and I barely got it to activate at all over the course of an hour's shooting. Overall, the 100-400 seemed to work more as I'd expect -- a bit sporadic with its BEAF activation, probably due to the low light, but I saw it working often enough to feel a little reassured. Focus modes I variously used were AF-C small spot (my usual default), medium spot, and zone, both in tracking and non-tracking modes. Lenses wide open at 600mm and 400mm, respectively.
Screech owl, pretty small in the frame, BEAF box was bouncing all over its body:
Red-tailed hawk, in good lighting, BEAF did not activate at all (excuse the minor file corruption... having issues with my card reader). I had about 5 minutes taking shots of this bird and despite trying multiple focus modes I never got BEAF to activate:
Nuthatch in decent but not great light. BEAF did not activate at all as I followed it:
Northern Cardinal brightening up a dull day. BEAF worked as expected for this shot:
But a few seconds later BEAF failed to activate at all as he bobbed his head around, which was more typical of this outing:
Despite having a black eye in a black mask, BEAF used to have no problem with Cardinals. But here's another in which BEAF did not activate at all. Yes, it's a busy background, but how can an algorithm not see there's a bright red bird at the center of the frame?!
Thought I'd post a few examples straight from camera (jpgs from RAWs, no editing or cropping or artistic intent!) to illustrate the problems I'm having with BEAF. It'll be interesting to hear from folks whether my expectations for BEAF are in the right ballpark, but my opinion is that BEAF is not working as well as it used to with these sort of shots that I've been taking for years.
First three are with the 200-600 a few days ago. Second three are with the 100-400 today in slightly worse light. Overall, the 100-400 seemed to work more as I'd expect, despite being a bit sporadic with its BEAF activation. Focus modes I variously used were AF-C small spot (my usual default), medium spot, and zone, both in tracking and non-tracking modes. Lenses wide open at 600mm and 400mm, respectively.
Screech owl, pretty small in the frame, BEAF box was bouncing all over its body:
Red-tailed hawk, in good lighting, BEAF did not activate at all (excuse the minor file corruption... having issues with my card reader). I had about 5 minutes taking shots of this bird and despite trying multiple focus modes I never got BEAF to activate:
Nuthatch in decent but not great light. BEAF did not activate at all as I followed it:
Northern Cardinal brightening up a dull day. BEAF worked as expected for this shot:
But a few seconds later BEAF failed to activate at all as he bobbed his head around, which was more typical of this outing:
Despite having a black eye in a black mask, BEAF used to have no problem with Cardinals. But here's another in which BEAF did not activate at all. Yes, it's a busy background, but how can an algorithm not see there's a bright red bird at the center of the frame?!
Thought I'd post a few examples straight from camera (jpgs from RAWs, no editing or cropping or artistic intent!) to illustrate the problems I'm having with BEAF. It'll be interesting to hear from folks whether my expectations for BEAF are in the right ballpark, but my opinion is that BEAF is not working as well as it used to with these sort of shots that I've been taking for years.
First three are with the 200-600 a few days ago. Second three are with the 100-400 today in slightly worse light. Overall, the 100-400 seemed to work more as I'd expect, despite being a bit sporadic with its BEAF activation. Focus modes I variously used were AF-C small spot (my usual default), medium spot, and zone, both in tracking and non-tracking modes. Lenses wide open at 600mm and 400mm, respectively.
Screech owl, pretty small in the frame, BEAF box was bouncing all over its body:
Red-tailed hawk, in good lighting, BEAF did not activate at all (excuse the minor file corruption... having issues with my card reader). I had about 5 minutes taking shots of this bird and despite trying multiple focus modes I never got BEAF to activate:
Nuthatch in decent but not great light. BEAF did not activate at all as I followed it:
Northern Cardinal brightening up a dull day. BEAF worked as expected for this shot:
But a few seconds later BEAF failed to activate at all, which was more typical of this outing:
Despite having a black eye in a black mask, BEAF used to have no problem with Cardinals. But here's another in which BEAF did not activate at all. Yes, it's a busy background, but how can an algorithm not see there's a bright red bird at the center of the frame?!
Thought I'd post a few examples straight from camera (no editing or cropping or artistic intent!) to illustrate the problems I'm having with BEAF. It'll be interesting to hear from folks whether my expectations for BEAF are in the right ballpark, but my opinion is that BEAF is not working as well as it used to with these sort of shots that I've been taking for years.
First three are with the 200-600 a few days ago. Second three are with the 100-400 today in slightly worse light. Overall, the 100-400 seemed to work more as I'd expect, despite being a bit sporadic with its BEAF activation. Focus modes I variously used were AF-C small spot (my usual default), medium spot, and zone, both in tracking and non-tracking modes. Lenses wide open at 600mm and 400mm, respectively.
Screech owl, pretty small in the frame, BEAF box was bouncing all over its body:
Red-tailed hawk, in good lighting, BEAF did not activate at all (excuse the minor file corruption... having issues with my card reader). I had about 5 minutes taking shots of this bird and despite trying multiple focus modes I never got BEAF to activate:
Nuthatch in decent but not great light. BEAF did not activate at all as I followed it:
Northern Cardinal brightening up a dull day. BEAF worked as expected for this shot:
But a few seconds later BEAF failed to activate at all, which was more typical of this outing:
Despite having a black eye in a black mask, BEAF used to have no problem with Cardinals. But here's another in which BEAF did not activate at all. Yes, it's a busy background, but how can an algorithm not see there's a bright red bird at the center of the frame?!
Mar 01, 2023 at 06:57 PM
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