0Nope, afaik they simply show the effective f-stop, and then you know why the shutter speed suddenly gets longer.
If you're using a Nikon camera in Av mode and go to 1:1 magnification, the shutter speed doesn't change you get shots underexposed by 2 stops?
So, you'd prefer that the camera report an aperture that is not the one you selected, whereas I'd prefer that the camera show the selected aperture and adjust the exposure to compensate.
It's not a moral issue, which calling it 'hiding' implies. Rather, Canon and Nikon have simply chosen different ways to represent the loss of light at high magnification.
As a side note, that must mean a Nikon camera will display an aperture value that is smaller than the lens is physically capable of achieving. So if we're going to make it a moral issue, Canon is hiding something, and Nikon is lying about something else.
There's no 'magic number' for that, there's no 'macro mechanism'
Imho there is, it's the "extension" that only a real macro lens has.
The EF-S 18-55mm f/3.5-5.6 IS STM has a maximum magnification of 0.36x, and at that magnification it is losing ~1 stop of light based on the narrower apparent aperture (or smaller effective f-stop, if you prefer that terminology). I wouldn't call the Rebel kit lens a 'real macro lens'...
That, the dr loss at the higher iso for ff, the working distance & swivel screen still make me use the 60d :-)
You seem to be ignoring the fact that the APS-C sensor has less DR than the FF sensor, at all ISO settings.
ISO 800 on the 6D has the same DR as ISO 100 on the 60D - a 3-stop advantage for the FF sensor
. At ISO 400 and above on the 60D, the 6D has approximately the same DR at a 2-stop higher ISO setting. Where is the DR advantage of the APS-C sensor?
Swivel screen? Canon's free EOS Remote app allows remote live view from the 6D, and may be more useful than a swivel screen. Granted, the 6D is the only Canon FF camera with Wi-Fi (so far)…but there's also CamRanger for the others.
As for the working distance advantage, that's the same argument for why APS-C is better when you're focal length limited in telephoto situations. It's only an advantage if you require more than ~8 MP for your output (i.e. you're printing larger than 16x24"/A2) and
you're shooting at relatively low ISO. For normal and small prints, web use, or if you have to boost the ISO, the cropped FF image will be as good or better.