800D + 100-400 f5.6 II + Extender 1.4x III AUTOFOCUS WORKS ON F8 27 POINTS

KevinRA wrote:

Myrgjorf wrote:

KevinRA wrote:

cdmazoff wrote:

The new lens combo achieves 960mm

Brilliant it works and you like it.

To be clear it is only 560mm That's the laws of physics. (Your camera simply throws away the off-centre picture image by not being able to record it by the impact of a small sensor). You could get exactly the same image and magnification with an equal high density pixel full frame camera and 560mm.

Enjoy though

Where do you get a 61.4 MP FF with EF mount?

5DSR = 50 MP. Plus no AA filter. Difference in linear resolution is trivial between 50 and 61 MP.

I think the 5DSR is a little more expensive than the 800D. And it still doesn't have the pixel density of the 800D.

It's still not 896mm or 960mm. It's just 560mm on a crop sensor which throws away half the image - in terms of everything not least depth of field.

Nice images yes all being well. But it's a myth that crop cameras somehow increase your focal length - they just reduce your angle viewing by cropping the image and not using part of the lens capacity.

Of course 560 mm is 560 mm. Just like the 4.3 mm f/1.7 lens on my smartphone is a 4.3 mm f/1.7 lens even it's photos doesn't look like a photo from a 4.3 mm f/1.7 lens from my FF (I am still looking for that lens). But FOV, "magnification", pixel density and FPS are more important than FL in many situations.

The crop doesn't throws away half of the image. It just uses a smaller part of the image circle from the lens. Just like a FF also only uses part of the image circle. The crop camera just uses the very best part of the image circle without sharpness fall off, vignetting etc. The FF often has to use the lesser quality part of the image circle.

FF isn't THE optimal size for a image sensor. It's just a standard that the market and the industry has agreed on for some purposes. I guess medium format shooters may talk about the poor IQ and DOF control from the small FF sensors when they meet. We as FF shotter are happy, though, that we don't have to lug around with (or pay for) a 600 mm FF equivalent lens for medium format. Just like crop shooter may be happy that they  don't have to lug around with (or pay for) a 600 mm FF lens.

I am sure you know all this but I often feel that some FF owners are very arrogant towards crop shooters.  I have both FF and crop as I am doing some wild life photo. Many of the wild life photographers I know also have both FF and crop. Especially many Nikon shooters use the D500 a lot. Not because they can't afford a FF - they have FF's. But because the D500 sometimes is the best tool because of pixel density, FPS, AF, FOV in the OVF...

I don't what to start a long discussion that has been taken many times before, so I will leave this thread with this comment.