The 600/4 GM works very well with the 2X TC. I have been using it with the A7R4 to capture images of the Grebes at Lake Hodges. Here are a couple of images of the Grebes "Rushing", which is part of their mating ritual. The combination works very well, although the low res images posted here do not fully show the quality of the images. I will post a somewhat larger set of images on the N&W forum.
AGeoJO wrote:
I have been using this lens in the last 2 days at 2 different birding locations. The optical performance is just superb. Although I have been pleased with the AF performance as well but I am not 100% convinced... yet. I simply haven't had the chance to fully evaluate it. Is the AF performance better than my adapted lens? You bet! With that said it is time for me to sell both adapted lenses for my wildlife and birding needs...
Here are a few images from the last two days. The first 3 images were taken this morning. I used a tripod and my A7r III to showcase the IQ that lens can pull. The last 5 images of a burrowing owl carrying a June bug it its beak were taken handheld (phew, not easy to do that for an old fart ). The total frames of the sequence was in the high 20's, using Zone AF with Tracking. And yes, all of them were critically sharp. I am planning of using a monopod at the next outing to catch the flying action though.
As a side note: The vegetation around the spots at both locations sucks.... I wish I could remotely operate a grass trimming device . Just FYI, the images were cropped as needed and edited using LR and PS.
Thank you for stopping by. Please, please post your images taken with that lens using any Sony camera here. ...Show more →
While all you guys are enjoying your new A1, I snapped this Barred Owl this afternoon with my decrepit old a9. Hand-held with 1.4 extender. It was very dark, plus, with the backlight, I had to increase the exposure comp, taking it to 6400 ISO.
This bird's M. O. was to drill sap wells into the bark, returning periodically to check for seeping sap and any insects attracted to the sap. Starting at the base of the tree it worked its way up, checking existing sap wells and drilling new wells as it deemed necessary.
). The total frames of the sequence was in the high 20's, using Zone AF with Tracking. And yes, all of them were critically sharp. I am planning of using a monopod at the next outing to catch the flying action though. 
