I shoot with either a 7D11 on a 500f4+ 1.4 converter, and a D500 on 500, 300 pf +1.4 converter. In almost all circumstances I crop my images.
I'd like try to improve my Wildlife photography, so my learned friends try to persuade me to go full frame.
Now I get that both Canon and Nikon full frame cameras will give me better ISO quality, more frames per second and probably better AF, esp the new R5 and would inevitably give me more images to play with.
Ultimately though I'm going to have to crop these images just to get to the same size of my Canon / Nikon native images. I then will need to crop even further to get the to the size of my cameras cropped images. (You might say well i need to get closer but in Britain wildlife will rarely allow this. )
If I crop on a 1DX total pixel count would be quite small and surely not as good as I'm getting now. If i do this on say a D850 or say an R5 the pixel count is going to be within the same field as my cropped cameras.
Given the use of the latest denoise and sharpening editors surely the finished images should not be that far apart from each other albeit there may be more of them to edit.
So what will I achieve by paying several extra thousands of pounds for a D5/6/R5? apart from getting a much slicker camera and why should full frame be the camera to aspire to? What am I missing?
Perfect advice from your friends
"so my learned friends try to persuade me to go full frame." good advice take it.
I hear you, Steve has also answered it well. and given you a FIX.
If you cant fill the frame on a FX then stay with the DX, simple.
For me well I see it like this,
In the left hand you have a D500 D7800, in the right hand you have the D5 D6, in the middle you have the best allrounder the D850, now just match it with the right glass.
Consolidate, Sell everything get a D850 and the right glass to go with it, 1) 600 FL. or 2) 800 FL, Spend the bucks, you only live once, you don't really need that new car do you LOL. 600 F4 Fl you say, its F4 not F5.6, its light fast sharp, great colour.
Rent first what you want to buy.
This page has some amazing views and some good tips.
One thing it shows is just how versatile and good the D850 really is. Oh it may not be the answer to your issue entirely, but your friends seem to thinkso, I would be asking why they are suggesting FX..
I find that a DX camera can deliver excellent images that even look like they were taken on higher res FX camera like the D850, however the DX camera seems to be more critically dependant on ideal light than say the D850 or single digit pro models. In the past I found hands down the moment the light goes off a little the DX goes in the bag.
Eventually I got rid of the DX cameras ages ago as have most of my colleagues, we are all FX purely for image quality (D850, D6, Z7)
Only and Opinion as always