jerste

1.7ii

dpreview stated "the lens offers a full-frame equivalent focal length range of 229–914mm" not field of view.

but that does really not make any sense. If you shoot full frame and then crop you do not say - i was using 900mm or 2000mm lens equivalent

Why dpreview.com spreads this silly idea of ​​the equivalent of focal lenght? Just because the camera has a cropped sensor does not mean that the lens has a longer focal length.

Its a very sharp lens wide open at 500mm but i suppose many copies may be a bit soft and you have to calibrate it perhaps on your body.

d500 and z7 have almost the same pixel density so just use z7 in fx mode and crop later in pp. You could use z7 in dx mode for some reasons but i think you gain more to use it in fx. In fx you ...

I think you have some misconception about the reach in dx mode, in fact dx gives you zero more reach.

Nice photos. How is 500mm pf focusing with z6? What AF mode did you use? The photos seem slightly out of focus. In second photo focus is at the bottom right corner

Placed 18^th in the challenge.

Sony has internal zoom so less dust in the lens and in the camera. Sigma potential problems with AF - not sure about it, to be tested. Sigma has arca swiss compatible foot. Sigma is black so a ...

With bird you do not need zoom too often because you usually crop. Most super teles are not zooms. All 600mm f4, 500 f4, 400 f 2.8 are primes. I use 500mm on crop camera D500 and I am fine. You ...

i have not a difficulty, you know what i mean but you troll a bit, just read what you wrote: below 840mm and APS-C mode so effectively 1260mm. I ask how do you get more reach in aps-c mode 1260mm?

so effectively 1260mm.???

aps-c mode is just cropping. It will not give you more reach

Obviously Sigma 500 f4 will be a better choice for birding. 120-300mm with 2x tc is too much compromise on quality. Even 150-600 Sports is a better choice than 120-300.