Boy has a Nikon D3100, with lenses like 18-55, 55-200 and a couple more. He takes photos and videos of wildlife and trains.
He has suggested an Xmas present of a 600mm lens. I have two issues with this: firstly it’s probably the wrong thing, as he tends to walk around taking pictures rather stay in one spot with a tripod. Secondly it’s fucking expensive!
I think that a much better choice would be to get a used D3500 or D5600 body, as this would give higher resolution, much better low light output and ISO, plus phone connection etc.
But I’m slightly concerned about getting a camera like that when the future seems mirrorless. That said, a whole new camera system is unlikely to be within budget.
Buying that and you will be paying for lenses that he already has. It may be too small a camera to easily use with large lenses should he get one.
I think the lightest fx fit 150 - 600 is over 2kg that is a lot to lug around
Going from 200mm to 600mm is a really large step, perhaps too large. Is getting a Tamron 100 - 400 an option? and later if needed a 1.4x converter?
I reckon that a new body would actually be the most useful in practice - having an extra 4 stops is very handy, as well as lots of features and better AF. But a new lens does things that you just can’t do with they lenses he has.