Canon 70-300 IS swap for Canon 70-200 f4 good idea?

[rgrebby]

Wondering about trying to swap my 70-300 lens for a used 70-200L f4

Is this a good idea and how much extra would I have to spend?

[beermonster65]

Second hand 70-200 f4 L tend to fetch between £350 - £450, I know this as I've done lots of research and got one for £350 in the end, image quality is superb but I do miss the reach I had on my Sigma 70-300 although I don't miss the softness at full stretch :)

[rgrebby]

My 70-300 is only a few months old and in perfect condition.

[HoppyUK]

What do you want to get rid for? You'll lose 100mm reach and IS.

I doubt you will see anything noticeable in terms of IQ, except when you try to hand hold it at a low shutter speed ;) but you will gain a nice big white L jobbie.